Step 1 : Simple Custom Element

.gitignore

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+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Typescript v1 declaration files
+typings/
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variables file
+.env

README.md

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+# Introduction to Web Components
+
+This repo was created to support [a technical workshop](https://www.meetup.com/Coffee-Code-and-Chat/events/245662648/) given in Utrecht in December 2017.
+
+Each index file represents a simple exercise meant to show a given aspect of **[Web Components](https://www.webcomponents.org/)**.
+
+## Slides and Work Material
+
+[Slides are here](https://docs.google.com/presentation/d/1h_wp7a_xbjJxeNLu6_Dd8Q4fBy2zA6jc1AjZrNqSEjo/edit?usp=sharing)

bower_components/webcomponentsjs/.bower.json

@@ -0,0 +1,35 @@
+{
+  "name": "webcomponentsjs",
+  "description": "Web components polyfill",
+  "main": "webcomponents.js",
+  "homepage": "http://webcomponents.org",
+  "authors": [
+    "The Polymer Authors"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/webcomponents/webcomponentsjs.git"
+  },
+  "keywords": [
+    "webcomponents",
+    "web-components",
+    "polyfill",
+    "shim"
+  ],
+  "license": "BSD-3-Clause",
+  "ignore": [],
+  "devDependencies": {
+    "web-component-tester": "^v6.0.0"
+  },
+  "version": "1.0.20",
+  "_release": "1.0.20",
+  "_resolution": {
+    "type": "version",
+    "tag": "v1.0.20",
+    "commit": "e83a68eb7d74f7d03e6ed111085730c10cb58507"
+  },
+  "_source": "https://github.com/Polymer/webcomponentsjs.git",
+  "_target": "^1.0.20",
+  "_originalSource": "webcomponentsjs",
+  "_direct": true
+}

bower_components/webcomponentsjs/.eslintrc.json

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+{
+  "extends": "eslint:recommended",
+  "env": {
+    "browser": true,
+    "es6": true
+  },
+  "parserOptions": {
+    "ecmaVersion": 6,
+    "sourceType": "module"
+  }
+}

bower_components/webcomponentsjs/.gitattributes

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+/webcomponents*.js binary
+/webcomponents*.js.map binary
+/webcomponents-loader.js -binary

bower_components/webcomponentsjs/.gitignore

@@ -0,0 +1,3 @@
+node_modules
+bower_components
+dist

bower_components/webcomponentsjs/.travis.yml

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+language: node_js
+sudo: required
+dist: trusty
+node_js: stable
+addons:
+  firefox: latest
+  apt:
+    sources:
+    - google-chrome
+    packages:
+    - google-chrome-stable
+before_script:
+- export DISPLAY=:99.0
+- sh -e /etc/init.d/xvfb start
+- sleep 3
+script:
+- npm install -g bower
+- bower install
+- wct -l chrome
+- wct -l firefox
+- if [ "${TRAVIS_PULL_REQUEST}" = "false" ]; then wct -s 'windows 10/microsoftedge@14' -s 'windows 8.1/internet explorer@11' -s 'os x 10.11/safari@10' -s 'os x 10.11/safari@9' -s 'Linux/chrome@41'; fi
+env:
+  global:
+  - secure: Fpp9LwJSGOdTrSIImQTlbzxozBsqe/2AJN5OfTXSe12FZxqzz50gevdxQcIlLypKaNyCtjb980DJbwdJR2cXUqaunLZAPWxrKa7ZPwamUxW+zVL7EHqy5zuvD+yJ+Vmk3ahs3WBTVyJ8T3XoaSfo9VumDIcKggWGJwgvM3blIMg=
+  - secure: Bj8MgzUVP0X8MLgK3d9eF48V7x0rPJyrN1IyguzKyJJVC8LV2XZXF+6o/M+zNsVMSsjhgXMkS3RRuaUShxO/OS6gHeG31FWcZqbXfZfgMMyH8a8zDls+r8m2lGEICaZo1OTXR0uiR/VNVt7n2xoBnTmjmRFwkaxAZk4yCjbXYzQ=

bower_components/webcomponentsjs/CONTRIBUTING.md

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+# Contributing
+
+Want to contribute to webcomponents.js? Great!
+
+We are more than happy to accept external contributions to the project in the form of [bug reports](../../issues) and pull requests.
+
+## Contributor License Agreement
+
+Before we can accept patches, there's a quick web form you need to fill out.
+
+- If you're contributing as an individual (e.g. you own the intellectual property), fill out [this form](http://code.google.com/legal/individual-cla-v1.0.html).
+- If you're contributing under a company, fill out [this form](http://code.google.com/legal/corporate-cla-v1.0.html) instead.
+
+This CLA asserts that contributions are owned by you and that we can license all work under our [license](LICENSE).
+
+Other projects require a similar agreement: jQuery, Firefox, Apache, Node, and many more.
+
+[More about CLAs](https://www.google.com/search?q=Contributor%20License%20Agreement)
+
+## Initial setup
+
+1. Setup Gulp: `sudo npm install -g gulp`
+1. Fork the project on github and pull down your copy.
+   > replace the {{ username }} with your username and {{ repository }} with the repository name
+
+        git clone git@github.com:{{ username }}/{{ repository }}.git
+
+1. Test your change results in a working build.
+   > in the repo you've made changes to, try generating a build:
+
+        cd $REPO
+        npm install
+        gulp
+
+The builds will be placed into the `dist/` directory if all goes well.
+
+1. Commit your code and make a pull request.
+
+That's it for the one time setup. Now you're ready to make a change.
+
+## Submitting a pull request
+
+We iterate fast! To avoid potential merge conflicts, it's a good idea to pull from the main project before making a change and submitting a pull request. The easiest way to do this is setup a remote called `upstream` and do a pull before working on a change:
+
+    git remote add upstream git://github.com/polymer/webcomponentsjs.git
+
+Then before making a change, do a pull from the upstream `master` branch:
+
+    git pull upstream master
+
+To make life easier, add a "pull upstream" alias in your `.gitconfig`:
+
+    [alias]
+      pu = !"git fetch origin -v; git fetch upstream -v; git merge upstream/master"
+
+That will pull in changes from your forked repo, the main (upstream) repo, and merge the two. Then it's just a matter of running `git pu` before a change and pushing to your repo:
+
+    git checkout master
+    git pu
+    # make change
+    git commit -a -m 'Awesome things.'
+    git push
+
+Lastly, don't forget to submit the pull request.

bower_components/webcomponentsjs/LICENSE.md

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+# License
+
+Everything in this repo is BSD style license unless otherwise specified.
+
+Copyright (c) 2015 The Polymer Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+
+* Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+* Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+* Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

bower_components/webcomponentsjs/README.md

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+webcomponents.js (v1 spec polyfills)
+================
+
+[![Build Status](https://travis-ci.org/webcomponents/webcomponentsjs.svg?branch=master)](https://travis-ci.org/webcomponents/webcomponentsjs)
+
+> **Note**. For polyfills that work with the older Custom Elements and Shadow DOM v0 specs, see the [v0 branch](https://github.com/webcomponents/webcomponentsjs/tree/v0).
+
+A suite of polyfills supporting the [Web Components](http://webcomponents.org) specs:
+
+- **Custom Elements v1**: allows authors to define their own custom tags ([spec](https://w3c.github.io/webcomponents/spec/custom/), [tutorial](https://developers.google.com/web/fundamentals/getting-started/primers/customelements)).
+- **HTML Imports**: a way to include and reuse HTML documents via other HTML documents ([spec](https://w3c.github.io/webcomponents/spec/imports/), [tutorial](https://www.html5rocks.com/en/tutorials/webcomponents/imports/)).
+- **Shadow DOM v1**: provides encapsulation by hiding DOM subtrees under shadow roots ([spec](https://w3c.github.io/webcomponents/spec/shadow/), [tutorial](https://developers.google.com/web/fundamentals/getting-started/primers/shadowdom)).
+
+For browsers that need it, there are also some minor polyfills included:
+- [`HTMLTemplateElement`](https://github.com/webcomponents/template)
+- [`Promise`](https://github.com/stefanpenner/es6-promise)
+- `Event`, `CustomEvent`, `MouseEvent` constructors and `Object.assign`, `Array.from` (see [webcomponents-platform](https://github.com/webcomponents/webcomponents-platform))
+
+## How to use
+
+The polyfills are built (concatenated & minified) into several bundles that target
+different browsers and spec readiness:
+
+- `webcomponents-hi.js` -- HTML Imports (needed by Safari Tech Preview)
+- `webcomponents-hi-ce.js` -- HTML Imports and Custom Elements v1 (needed by Safari 10)
+- `webcomponents-hi-sd-ce.js` -- HTML Imports, Custom Elements v1 and Shady DOM/CSS (needed by Safari 9, Firefox, Edge)
+- `webcomponents-sd-ce.js` -- Custom Elements and Shady DOM/CSS (no HTML Imports)
+- `webcomponents-lite.js` -- all of the polyfills: HTML Imports, Custom Elements, Shady DOM/CSS and generic platform polyfills (such as ES6 Promise, Constructable events, etc.) (needed by Internet Explorer 11), and Template (needed by IE 11 and Edge)
+
+If you are only targeting a specific browser, you can just use the bundle that's
+needed by it; alternatively, if your server is capable of serving different assets based on user agent, you can send the polyfill bundle that's necessary for the browser making that request.
+
+## `webcomponents-loader.js`
+Alternatively, this repo also comes with `webcomponents-loader.js`, a client-side
+loader that dynamically loads the minimum polyfill bundle, using feature detection.
+Note that because the bundle will be loaded asynchronously, you should wait for the `WebComponentsReady` before you can safely assume that all the polyfills have
+loaded and are ready to be used (i.e. if you want to dynamically load other custom
+elements, etc.).
+
+Additionally, you can check if `window.WebComponents` exists to know if the `WebComponentsReady` event will fire, and you can check if `window.WebComponents.ready` is true to check if the `WebComponentsReady` event has already fired.
+
+Here's an example:
+
+```html
+<!-- Load polyfills; note that "loader" will load these async -->
+<script src="bower_components/webcomponentsjs/webcomponents-loader.js"></script>
+
+<!-- Load a custom element definition via HTMLImports -->
+<link rel="import" href="my-element.html">
+
+<!-- Use the custom element -->
+<my-element></my-element>
+
+<!-- Interact with the upgraded element -->
+<script>
+  window.addEventListener('WebComponentsReady', function() {
+    // At this point we are guaranteed that all required polyfills have loaded,
+    // all HTML imports have loaded, and all defined custom elements have upgraded
+    let MyElement = customElements.get('my-element');
+    let element = document.querySelector('my-element');
+    console.assert(element instanceof MyElement);  // 👍
+    element.someAPI(); // 👍
+  });
+</script>
+```
+
+## `custom-elements-es5-adapter.js`
+According to the spec, Custom Elements must be ES6 classes (https://html.spec.whatwg.org/multipage/scripting.html#custom-element-conformance). Since most projects need to support a wide range of browsers that don't necessary support ES6, it may make sense to compile your project to ES5. However, ES5-style custom element classes will **not** work with native Custom Elements because ES5-style classes cannot properly extend ES6 classes, like `HTMLElement`.
+
+To work around this, load `custom-elements-es5-adapter.js` before declaring new Custom Elements.
+
+**The adapter must NOT be compiled.**
+
+```html
+<!-- Load Custom Elements es5 adapter -->
+<script src="bower_components/webcomponentsjs/custom-elements-es5-adapter.js"></script>
+<!-- Load polyfills; note that "loader" will load these async -->
+<script src="bower_components/webcomponentsjs/webcomponents-loader.js"></script>
+<!-- Load the es5 compiled custom element definition -->
+<link rel="import" href="my-es5-element.html">
+
+<!-- Use the custom element -->
+<my-es5-element></my-es5-element>
+```
+
+## Browser Support
+
+The polyfills are intended to work in the latest versions of evergreen browsers. See below
+for our complete browser support matrix:
+
+| Polyfill   | IE11+ | Chrome* | Firefox* | Safari 9+* | Chrome Android* | Mobile Safari* |
+| ---------- |:-----:|:-------:|:--------:|:----------:|:---------------:|:--------------:|
+| Custom Elements | ✓ | ✓ | ✓ | ✓ | ✓| ✓ |
+| HTML Imports |  ✓ | ✓ | ✓ | ✓| ✓| ✓ |
+| Shady CSS/DOM |  ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
+
+\*Indicates the current version of the browser
+
+The polyfills may work in older browsers, however require additional polyfills (such as classList, or other [platform](https://github.com/webcomponents/webcomponents-platform)
+polyfills) to be used. We cannot guarantee support for browsers outside of our compatibility matrix.
+
+
+### Manually Building
+
+If you wish to build the bundles yourself, you'll need `node` and `npm` on your system:
+
+ * install [node.js](http://nodejs.org/) using the instructions on their website
+ * use `npm` to install [gulp.js](http://gulpjs.com/): `npm install -g gulp`
+
+Now you are ready to build the polyfills with:
+
+    # install dependencies
+    npm install
+    bower install
+    # build
+    gulp
+
+The builds will be placed into the root directory.
+
+## Contribute
+
+See the [contributing guide](CONTRIBUTING.md)
+
+## License
+
+Everything in this repository is BSD style license unless otherwise specified.
+
+Copyright (c) 2015 The Polymer Authors. All rights reserved.
+
+## Helper utilities
+
+### `WebComponentsReady`
+
+Under native HTML Imports, `<script>` tags in the main document block the loading of such imports. This is to ensure the imports have loaded and any registered elements in them have been upgraded.
+
+The `webcomponents-lite.js` polyfill (as well as the smaller bundles and the loader) parse element definitions and handle their upgrade asynchronously. If prematurely fetching the element from the DOM before it has an opportunity to upgrade, you'll be working with an `HTMLUnknownElement`.
+
+For these situations, you can use the `WebComponentsReady` event as a signal before interacting with the element. The criteria for this event to fire is all Custom Elements with definitions registered by the time HTML Imports available at load time have loaded have upgraded.
+
+```js
+window.addEventListener('WebComponentsReady', function(e) {
+  // imports are loaded and elements have been registered
+  console.log('Components are ready');
+});
+```
+
+## Known Issues
+
+  * [ShadowDOM CSS is not encapsulated out of the box](#shadycss)
+  * [Custom element's constructor property is unreliable](#constructor)
+  * [Contenteditable elements do not trigger MutationObserver](#contentedit)
+  * [ShadyCSS: :host(.zot:not(.bar:nth-child(2))) doesn't work](#nestedparens)
+  
+### ShadowDOM CSS is not encapsulated out of the box <a id="shadycss"></a>
+The ShadowDOM polyfill is not able to encapsulate CSS in ShadowDOM out of the box. You need to use specific code from the ShadyCSS library, included with the polyfill. See [ShadyCSS instructions](https://github.com/webcomponents/shadycss).
+
+### Custom element's constructor property is unreliable <a id="constructor"></a>
+See [#215](https://github.com/webcomponents/webcomponentsjs/issues/215) for background.
+
+In Safari and IE, instances of Custom Elements have a `constructor` property of `HTMLUnknownElementConstructor` and `HTMLUnknownElement`, respectively. It's unsafe to rely on this property for checking element types.
+
+It's worth noting that `customElement.__proto__.__proto__.constructor` is `HTMLElementPrototype` and that the prototype chain isn't modified by the polyfills(onto `ElementPrototype`, etc.)
+
+### Contenteditable elements do not trigger MutationObserver <a id="contentedit"></a>
+Using the MutationObserver polyfill, it isn't possible to monitor mutations of an element marked `contenteditable`.
+See [the mailing list](https://groups.google.com/forum/#!msg/polymer-dev/LHdtRVXXVsA/v1sGoiTYWUkJ)
+
+### ShadyCSS: :host(.zot:not(.bar:nth-child(2))) doesn't work <a id="nestedparens"></a>
+ShadyCSS `:host()` rules can only have (at most) 1-level of nested parentheses in its argument selector under ShadyCSS. For example, `:host(.zot)` and `:host(.zot:not(.bar))` both work, but `:host(.zot:not(.bar:nth-child(2)))` does not.

bower_components/webcomponentsjs/bower.json

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+{
+  "name": "webcomponentsjs",
+  "description": "Web components polyfill",
+  "main": "webcomponents.js",
+  "homepage": "http://webcomponents.org",
+  "authors": [
+    "The Polymer Authors"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/webcomponents/webcomponentsjs.git"
+  },
+  "keywords": [
+    "webcomponents",
+    "web-components",
+    "polyfill",
+    "shim"
+  ],
+  "license": "BSD-3-Clause",
+  "ignore": [],
+  "devDependencies": {
+    "web-component-tester": "^v6.0.0"
+  }
+}

bower_components/webcomponentsjs/custom-elements-es5-adapter.js

@@ -0,0 +1,16 @@
+(function () {
+'use strict';
+
+(()=>{'use strict';if(!window.customElements)return;const a=window.HTMLElement,b=window.customElements.define,c=window.customElements.get,d=new Map,e=new Map;let f=!1,g=!1;window.HTMLElement=function(){if(!f){const a=d.get(this.constructor),b=c.call(window.customElements,a);g=!0;const e=new b;return e}f=!1;},window.HTMLElement.prototype=a.prototype;Object.defineProperty(window,'customElements',{value:window.customElements,configurable:!0,writable:!0}),Object.defineProperty(window.customElements,'define',{value:(c,h)=>{const i=h.prototype,j=class extends a{constructor(){super(),Object.setPrototypeOf(this,i),g||(f=!0,h.call(this)),g=!1;}},k=j.prototype;j.observedAttributes=h.observedAttributes,k.connectedCallback=i.connectedCallback,k.disconnectedCallback=i.disconnectedCallback,k.attributeChangedCallback=i.attributeChangedCallback,k.adoptedCallback=i.adoptedCallback,d.set(h,c),e.set(c,h),b.call(window.customElements,c,j);},configurable:!0,writable:!0}),Object.defineProperty(window.customElements,'get',{value:(a)=>e.get(a),configurable:!0,writable:!0});})();
+
+/**
+@license
+Copyright (c) 2017 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+*/
+
+}());

bower_components/webcomponentsjs/entrypoints/custom-elements-es5-adapter-index.js

@@ -0,0 +1,16 @@
+/**
+@license
+Copyright (c) 2017 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+*/
+'use strict';
+
+/*
+ * Polyfills loaded: Custom Elements ES5 Shim
+ */
+
+import '../node_modules/@webcomponents/custom-elements/src/native-shim.js';

bower_components/webcomponentsjs/entrypoints/webcomponents-hi-ce-index.js

@@ -0,0 +1,21 @@
+/**
+@license
+Copyright (c) 2017 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+*/
+'use strict';
+
+/*
+ * Polyfills loaded: HTML Imports, Custom Elements
+ * Used in: Safari 10, Firefox once SD is shipped
+ */
+
+import '../node_modules/@webcomponents/html-imports/src/html-imports.js';
+import '../node_modules/@webcomponents/custom-elements/src/custom-elements.js';
+
+import '../src/post-polyfill.js';
+import '../src/unresolved.js';

bower_components/webcomponentsjs/entrypoints/webcomponents-hi-index.js

@@ -0,0 +1,20 @@
+/**
+@license
+Copyright (c) 2017 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+*/
+'use strict';
+
+/*
+ * Polyfills loaded: HTML Imports
+ * Used in: Safari Tech Preview
+ */
+
+import '../node_modules/@webcomponents/html-imports/src/html-imports.js';
+
+import '../src/post-polyfill.js';
+import '../src/unresolved.js';

bower_components/webcomponentsjs/entrypoints/webcomponents-hi-sd-ce-index.js

@@ -0,0 +1,22 @@
+/**
+@license
+Copyright (c) 2017 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+*/
+'use strict';
+
+/*
+ * Polyfills loaded: HTML Imports, Custom Elements, Shady DOM/Shady CSS
+ * Used in: Safari 9, Firefox, Edge
+ */
+
+import '../node_modules/@webcomponents/html-imports/src/html-imports.js';
+import '../node_modules/@webcomponents/shadydom/src/shadydom.js';
+import '../node_modules/@webcomponents/custom-elements/src/custom-elements.js';
+import '../node_modules/@webcomponents/shadycss/entrypoints/scoping-shim.js';
+import '../src/post-polyfill.js';
+import '../src/unresolved.js';

bower_components/webcomponentsjs/entrypoints/webcomponents-hi-sd-ce-pf-index.js

@@ -0,0 +1,26 @@
+/**
+@license
+Copyright (c) 2017 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+*/
+'use strict';
+
+/*
+ * Polyfills loaded: HTML Imports, Custom Elements, Shady DOM/Shady CSS, platform polyfills, template
+ * Used in: IE 11
+ */
+
+import '../node_modules/@webcomponents/webcomponents-platform/webcomponents-platform.js';
+import '../node_modules/@webcomponents/template/template.js';
+import '../src/promise.js';
+import '../node_modules/@webcomponents/html-imports/src/html-imports.js';
+import '../src/pre-polyfill.js';
+import '../node_modules/@webcomponents/shadydom/src/shadydom.js';
+import '../node_modules/@webcomponents/custom-elements/src/custom-elements.js';
+import '../node_modules/@webcomponents/shadycss/entrypoints/scoping-shim.js';
+import '../src/post-polyfill.js';
+import '../src/unresolved.js';

bower_components/webcomponentsjs/entrypoints/webcomponents-sd-ce-index.js

@@ -0,0 +1,42 @@
+/**
+@license
+Copyright (c) 2017 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+*/
+'use strict';
+
+/*
+ * Polyfills loaded: Custom Elements, Shady DOM/Shady CSS
+ * Used in: Safari 9, Firefox, Edge
+ */
+
+import '../node_modules/@webcomponents/shadydom/src/shadydom.js';
+import '../node_modules/@webcomponents/custom-elements/src/custom-elements.js';
+import '../node_modules/@webcomponents/shadycss/entrypoints/scoping-shim.js';
+
+let document = window.document;
+// global for (1) existence means `WebComponentsReady` will file,
+// (2) WebComponents.ready == true means event has fired.
+window.WebComponents = window.WebComponents || {};
+
+function fire() {
+  requestAnimationFrame(() => {
+    window.WebComponents.ready = true;
+    window.document.dispatchEvent(new CustomEvent('WebComponentsReady', { bubbles: true }));
+  })
+}
+
+function wait() {
+  fire();
+  document.removeEventListener('readystatechange', wait);
+}
+
+if (document.readyState !== 'loading') {
+  fire();
+} else {
+  document.addEventListener('readystatechange', wait);
+}

bower_components/webcomponentsjs/externs/webcomponents.js

@@ -0,0 +1,25 @@
+/**
+ * @license
+ * Copyright (c) 2017 The Polymer Project Authors. All rights reserved.
+ * This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+ * The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+ * The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+ * Code distributed by Google as part of the polymer project is also
+ * subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+ *
+ * @fileoverview Symbols needed to compile webcomponents
+ * @externs
+ */
+var require;
+var global;
+var ES6Promise;
+var process;
+var define;
+var module;
+var exports;
+
+var ShadyDOM;
+var WebComponents;
+
+/** @type !Function */
+Promise.cast;

bower_components/webcomponentsjs/gulpfile.js

@@ -0,0 +1,176 @@
+/**
+ * @license
+ * Copyright (c) 2017 The Polymer Project Authors. All rights reserved.
+ * This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+ * The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+ * The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+ * Code distributed by Google as part of the polymer project is also
+ * subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+ */
+
+'use strict';
+
+/* eslint-env node */
+/* eslint-disable no-console */
+
+const gulp = require('gulp');
+const sourcemaps = require('gulp-sourcemaps');
+const rename = require('gulp-rename');
+const rollup = require('rollup-stream');
+const source = require('vinyl-source-stream');
+const del = require('del');
+const runseq = require('run-sequence');
+const closure = require('google-closure-compiler').gulp();
+const babel = require('rollup-plugin-babel');
+
+function debugify(sourceName, fileName, extraRollupOptions) {
+  if (!fileName)
+    fileName = sourceName;
+
+  const options = {
+    entry: `./entrypoints/${sourceName}-index.js`,
+    format: 'iife',
+    moduleName: 'webcomponentsjs'
+  };
+
+  Object.assign(options, extraRollupOptions);
+
+  return rollup(options)
+  .pipe(source(`${sourceName}-index.js`), 'entrypoints')
+  .pipe(rename(fileName + '.js'))
+  .pipe(gulp.dest('./'))
+}
+
+function closurify(sourceName, fileName) {
+  if (!fileName) {
+    fileName = sourceName;
+  }
+
+  const closureOptions = {
+    new_type_inf: true,
+    compilation_level: 'ADVANCED',
+    language_in: 'ES6_STRICT',
+    language_out: 'ES5_STRICT',
+    isolation_mode: 'IIFE',
+    assume_function_wrapper: true,
+    js_output_file: `${fileName}.js`,
+    warning_level: 'VERBOSE',
+    rewrite_polyfills: false,
+    module_resolution: 'NODE',
+    entry_point: `entrypoints/${sourceName}-index.js`,
+    dependency_mode: 'STRICT',
+    externs: [
+      'externs/webcomponents.js',
+      'node_modules/@webcomponents/custom-elements/externs/custom-elements.js',
+      'node_modules/@webcomponents/html-imports/externs/html-imports.js',
+      'node_modules/@webcomponents/shadycss/externs/shadycss-externs.js',
+      'node_modules/@webcomponents/shadydom/externs/shadydom.js'
+    ]
+  };
+
+  return gulp.src([
+      'entrypoints/*.js',
+      'src/*.js',
+      'node_modules/es6-promise/lib/es6-promise/**/*.js',
+      'node_modules/@webcomponents/**/*.js',
+      '!node_modules/@webcomponents/*/externs/*.js',
+      '!node_modules/@webcomponents/*/node_modules/**',
+      '!**/bower_components/**'
+    ], {base: './', follow: true})
+  .pipe(sourcemaps.init())
+  .pipe(closure(closureOptions))
+  .pipe(sourcemaps.write('.'))
+  .pipe(gulp.dest('.'));
+}
+
+gulp.task('debugify-hi', () => {
+  return debugify('webcomponents-hi')
+});
+
+gulp.task('debugify-hi-ce', () => {
+  return debugify('webcomponents-hi-ce')
+});
+
+gulp.task('debugify-hi-sd-ce', () => {
+  return debugify('webcomponents-hi-sd-ce')
+});
+
+gulp.task('debugify-hi-sd-ce-pf', () => {
+  // The es6-promise polyfill needs to set the correct context.
+  // See https://github.com/rollup/rollup/wiki/Troubleshooting#this-is-undefined
+  const extraOptions = {context: 'window'};
+  return debugify('webcomponents-hi-sd-ce-pf', 'webcomponents-lite', extraOptions)
+});
+
+gulp.task('debugify-sd-ce', () => {
+  return debugify('webcomponents-sd-ce')
+});
+
+gulp.task('closurify-hi', () => {
+  return closurify('webcomponents-hi')
+});
+
+gulp.task('closurify-hi-ce', () => {
+  return closurify('webcomponents-hi-ce')
+});
+
+gulp.task('closurify-hi-sd-ce', () => {
+  return closurify('webcomponents-hi-sd-ce')
+});
+
+gulp.task('closurify-hi-sd-ce-pf', () => {
+  return closurify('webcomponents-hi-sd-ce-pf', 'webcomponents-lite')
+});
+
+gulp.task('closurify-sd-ce', () => {
+  return closurify('webcomponents-sd-ce')
+});
+
+function singleLicenseComment() {
+  let hasLicense = false;
+  return (comment) => {
+    if (hasLicense) {
+      return false;
+    }
+    return hasLicense = /@license/.test(comment);
+  }
+}
+
+const babelOptions = {
+  presets: 'minify',
+  shouldPrintComment: singleLicenseComment()
+};
+
+gulp.task('debugify-ce-es5-adapter', () => {
+  return debugify('custom-elements-es5-adapter', '', {plugins: [babel(babelOptions)]});
+});
+
+gulp.task('default', ['closure']);
+
+gulp.task('clean-builds', () => {
+  return del(['custom-elements-es5-adapter.js{,.map}', 'webcomponents*.js{,.map}', '!webcomponents-loader.js']);
+});
+
+gulp.task('debug', (cb) => {
+  const tasks = [
+    'debugify-hi',
+    'debugify-hi-ce',
+    'debugify-hi-sd-ce',
+    'debugify-hi-sd-ce-pf',
+    'debugify-sd-ce',
+    'debugify-ce-es5-adapter'
+  ];
+  runseq('clean-builds', tasks, cb);
+});
+
+gulp.task('closure', (cb) => {
+  const tasks = [
+    'closurify-hi',
+    'closurify-hi-ce',
+    'closurify-hi-sd-ce',
+    'closurify-hi-sd-ce-pf',
+    'closurify-sd-ce',
+    'debugify-ce-es5-adapter'
+  ];
+  runseq('clean-builds', ...tasks, cb);
+});

bower_components/webcomponentsjs/package.json

@@ -0,0 +1,56 @@
+{
+  "name": "@webcomponents/webcomponentsjs",
+  "version": "1.0.20",
+  "description": "Web Components Polyfills",
+  "main": "webcomponents-lite.js",
+  "directories": {
+    "test": "tests"
+  },
+  "keywords": [
+    "webcomponents",
+    "web-components",
+    "polyfill",
+    "shim"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/webcomponents/webcomponentsjs.git"
+  },
+  "author": "The Polymer Authors",
+  "license": "BSD-3-Clause",
+  "bugs": {
+    "url": "https://github.com/webcomponents/webcomponentsjs/issues"
+  },
+  "scripts": {
+    "build": "gulp",
+    "test": "wct"
+  },
+  "homepage": "https://webcomponents.org/polyfills",
+  "devDependencies": {
+    "@webcomponents/custom-elements": "^1.0.6",
+    "@webcomponents/html-imports": "^1.0.3",
+    "@webcomponents/shadycss": "^1.1.0",
+    "@webcomponents/shadydom": "^1.0.9",
+    "@webcomponents/template": "^1.2.0",
+    "@webcomponents/webcomponents-platform": "^1.0.0",
+    "babel-preset-minify": "^0.2.0",
+    "del": "^3.0.0",
+    "es6-promise": "^4.1.1",
+    "eslint": "^4.12.0",
+    "google-closure-compiler": "^20171112.0.0",
+    "gulp": "^3.8.8",
+    "gulp-add-src": "^0.2.0",
+    "gulp-header": "^1.8.9",
+    "gulp-rename": "^1.2.2",
+    "gulp-sourcemaps": "^2.4.1",
+    "rollup-plugin-babel": "^2.7.1",
+    "rollup-stream": "=1.23",
+    "run-sequence": "^2.0.0",
+    "vinyl-buffer": "^1.0.0",
+    "vinyl-source-stream": "^1.1.0",
+    "web-component-tester": "^6.4.1"
+  },
+  "publishConfig": {
+    "access": "public"
+  }
+}

bower_components/webcomponentsjs/src/post-polyfill.js

@@ -0,0 +1,63 @@
+/**
+ * @license
+ * Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+ * This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+ * The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+ * The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+ * Code distributed by Google as part of the polymer project is also
+ * subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+ */
+
+'use strict';
+
+let customElements = window['customElements'];
+let HTMLImports = window['HTMLImports'];
+let Template = window['HTMLTemplateElement'];
+
+// global for (1) existence means `WebComponentsReady` will file,
+// (2) WebComponents.ready == true means event has fired.
+window.WebComponents = window.WebComponents || {};
+
+if (customElements && customElements['polyfillWrapFlushCallback']) {
+  // Here we ensure that the public `HTMLImports.whenReady`
+  // always comes *after* custom elements have upgraded.
+  let flushCallback;
+  let runAndClearCallback = function runAndClearCallback() {
+    if (flushCallback) {
+      // make sure to run the HTMLTemplateElement polyfill before custom elements upgrade
+      if (Template.bootstrap) {
+        Template.bootstrap(window.document);
+      }
+      let cb = flushCallback;
+      flushCallback = null;
+      cb();
+      return true;
+    }
+  }
+  let origWhenReady = HTMLImports['whenReady'];
+  customElements['polyfillWrapFlushCallback'](function(cb) {
+    flushCallback = cb;
+    origWhenReady(runAndClearCallback);
+  });
+
+  HTMLImports['whenReady'] = function(cb) {
+    origWhenReady(function() {
+      // custom element code may add dynamic imports
+      // to match processing of native custom elements before
+      // domContentLoaded, we wait for these imports to resolve first.
+      if (runAndClearCallback()) {
+        HTMLImports['whenReady'](cb);
+      } else {
+        cb();
+      }
+    });
+  }
+
+}
+
+HTMLImports['whenReady'](function() {
+  requestAnimationFrame(function() {
+    window.WebComponents.ready = true;
+    document.dispatchEvent(new CustomEvent('WebComponentsReady', {bubbles: true}));
+  });
+});

bower_components/webcomponentsjs/src/pre-polyfill.js

@@ -0,0 +1,63 @@
+/**
+ * @license
+ * Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+ * This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+ * The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+ * The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+ * Code distributed by Google as part of the polymer project is also
+ * subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+ */
+
+'use strict';
+
+// Establish scope.
+window['WebComponents'] = window['WebComponents'] || {'flags':{}};
+
+// loading script
+let file = 'webcomponents-lite.js';
+let script = document.querySelector('script[src*="' + file + '"]');
+let flagMatcher = /wc-(.+)/;
+
+// Flags. Convert url arguments to flags
+let flags = {};
+if (!flags['noOpts']) {
+  // from url
+  location.search.slice(1).split('&').forEach(function(option) {
+    let parts = option.split('=');
+    let match;
+    if (parts[0] && (match = parts[0].match(flagMatcher))) {
+      flags[match[1]] = parts[1] || true;
+    }
+  });
+  // from script
+  if (script) {
+    for (let i=0, a; (a=script.attributes[i]); i++) {
+      if (a.name !== 'src') {
+        flags[a.name] = a.value || true;
+      }
+    }
+  }
+  // log flags
+  if (flags['log'] && flags['log']['split']) {
+    let parts = flags['log'].split(',');
+    flags['log'] = {};
+    parts.forEach(function(f) {
+      flags['log'][f] = true;
+    });
+  } else {
+    flags['log'] = {};
+  }
+}
+
+// exports
+window['WebComponents']['flags'] = flags;
+let forceShady = flags['shadydom'];
+if (forceShady) {
+  window['ShadyDOM'] = window['ShadyDOM'] || {};
+  window['ShadyDOM']['force'] = forceShady;
+}
+
+let forceCE = flags['register'] || flags['ce'];
+if (forceCE && window['customElements']) {
+  window['customElements']['forcePolyfill'] = forceCE;
+}

bower_components/webcomponentsjs/src/promise.js

@@ -0,0 +1,26 @@
+/**
+@license
+Copyright (c) 2017 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+*/
+'use strict';
+import ES6Promise from '../node_modules/es6-promise/lib/es6-promise/promise.js';
+
+/*
+Assign the ES6 promise polyfill to window ourselves instead of using the "auto" polyfill
+to work around https://github.com/webcomponents/webcomponentsjs/issues/837
+*/
+if (!window.Promise) {
+  window.Promise = ES6Promise;
+  // save Promise API
+  ES6Promise.prototype['catch'] = ES6Promise.prototype.catch;
+  ES6Promise.prototype['then'] = ES6Promise.prototype.then;
+  ES6Promise['all'] = ES6Promise.all;
+  ES6Promise['race'] = ES6Promise.race;
+  ES6Promise['resolve'] = ES6Promise.resolve;
+  ES6Promise['reject'] = ES6Promise.reject;
+}

bower_components/webcomponentsjs/src/unresolved.js

@@ -0,0 +1,31 @@
+/**
+ * @license
+ * Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+ * This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+ * The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+ * The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+ * Code distributed by Google as part of the polymer project is also
+ * subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+ */
+
+'use strict';
+// It's desireable to provide a default stylesheet
+// that's convenient for styling unresolved elements, but
+// it's cumbersome to have to include this manually in every page.
+// It would make sense to put inside some HTMLImport but
+// the HTMLImports polyfill does not allow loading of stylesheets
+// that block rendering. Therefore this injection is tolerated here.
+//
+// NOTE: position: relative fixes IE's failure to inherit opacity
+// when a child is not statically positioned.
+let style = document.createElement('style');
+style.textContent = ''
+    + 'body {'
+    + 'transition: opacity ease-in 0.2s;'
+    + ' } \n'
+    + 'body[unresolved] {'
+    + 'opacity: 0; display: block; overflow: hidden; position: relative;'
+    + ' } \n'
+    ;
+let head = document.querySelector('head');
+head.insertBefore(style, head.firstChild);

bower_components/webcomponentsjs/tests/ce-import-upgrade-async.html

@@ -0,0 +1,46 @@
+<!doctype html>
+<!--
+    @license
+    Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+    This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+    The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+    The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+    Code distributed by Google as part of the polymer project is also
+    subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+<html>
+  <head>
+    <title></title>
+    <meta charset="UTF-8">
+    <script src="../webcomponents-loader.js"></script>
+    <script src="../../web-component-tester/browser.js"></script>
+  </head>
+  <body>
+    <script>
+      test('import upgrade async', function(done) {
+
+        function testImports() {
+          // import upgraded
+          assert.ok(a1);
+          assert.isTrue(isA1Upgraded);
+          // order expected
+          assert.deepEqual(a1DocsList, ['a1-instance.html', 'a1-reference.html']);
+          // style applied at upgrade time
+          if (window.HTMLImports) {
+            assert.isTrue(styleAppliedToDocument);
+          }
+          done();
+        }
+
+        // be async
+        setTimeout(function() {
+          var l = document.createElement('link');
+          l.rel = 'import';
+          l.href = 'imports/a1-import.html';
+          l.addEventListener('load', testImports);
+          document.head.appendChild(l);
+        });
+      });
+    </script>
+  </body>
+</html>

bower_components/webcomponentsjs/tests/ce-import-upgrade.html

@@ -0,0 +1,31 @@
+<!doctype html>
+<!--
+    @license
+    Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+    This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+    The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+    The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+    Code distributed by Google as part of the polymer project is also
+    subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+<html>
+  <head>
+    <title></title>
+    <meta charset="UTF-8">
+    <script src="../webcomponents-loader.js"></script>
+    <script src="../../web-component-tester/browser.js"></script>
+    <link rel="import" href="imports/a1-import.html">
+  </head>
+  <body>
+    <script>
+      test('import upgrade', function() {
+        // import upgraded
+        assert.ok(a1);
+        assert.isTrue(isA1Upgraded);
+        // order expected
+        assert.deepEqual(a1DocsList, ['a1-instance.html', 'a1-reference.html']);
+        assert.isTrue(styleAppliedToDocument);
+      });
+    </script>
+  </body>
+</html>

bower_components/webcomponentsjs/tests/ce-import.html

@@ -0,0 +1,38 @@
+<!doctype html>
+<!--
+@license
+Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+<html>
+  <head>
+    <title></title>
+    <meta charset="UTF-8">
+    <script src="../webcomponents-loader.js"></script>
+    <script src="../../web-component-tester/browser.js"></script>
+  </head>
+  <body>
+    <x-foo></x-foo>
+    <script>
+      test('ce-import', function(done) {
+        var xfoo = document.querySelector('x-foo');
+        assert.isUndefined(xfoo.isCreated);
+
+        var link = document.createElement('link');
+        link.rel = 'import';
+        link.href = 'imports/element-import.html';
+        document.head.appendChild(link);
+        link.addEventListener('load', function() {
+          assert.isTrue(xfoo.isCreated, 'element in main document, registered in dynamic import is upgraded');
+          var ix = link.import.querySelector('x-foo');
+          assert.isTrue(ix.isCreated, 'element in import, registered in dynamic import is upgraded');
+          done();
+        });
+      });
+    </script>
+  </body>
+</html>

bower_components/webcomponentsjs/tests/ce-upgrade-order.html

@@ -0,0 +1,36 @@
+<!doctype html>
+<!--
+    @license
+    Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+    This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+    The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+    The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+    Code distributed by Google as part of the polymer project is also
+    subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <title>Custom Element Upgrade Order</title>
+  <script src="../webcomponents-loader.js"></script>
+  <script src="../../web-component-tester/browser.js"></script>
+  <link rel="import" href="imports/import-upgrade-order.html">
+</head>
+<body>
+  <x-foo id="main"></x-foo>
+  <script>
+    suite('Custom Element upgrade', function() {
+      test('upgrade order', function() {
+        var order = [];
+        class XFoo extends HTMLElement {
+          connectedCallback() {
+            order.push(this.id);
+          }
+        }
+        window.customElements.define('x-foo', XFoo);
+        assert.deepEqual(order, ['import', 'main'], 'elements are upgraded in imports before main document');
+      });
+    });
+  </script>
+</body>
+</html>

bower_components/webcomponentsjs/tests/ce-upgradedocumenttree.html

@@ -0,0 +1,56 @@
+<!doctype html>
+<!--
+@license
+Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+<html>
+  <head>
+    <title></title>
+    <meta charset="UTF-8">
+    <script>
+      WCT = {
+        waitFor: function(cb) {
+          cb();
+        }
+      }
+    </script>
+    <script src="../webcomponents-loader.js"></script>
+    <script src="../../web-component-tester/browser.js"></script>
+    <link rel="import" href="imports/element-import-a.html">
+  </head>
+  <body>
+    <x-test></x-test>
+
+    <script>
+      var created = 0;
+      function register() {
+        class XTest extends HTMLElement {
+          connectedCallback() {
+            created++;
+          }
+        }
+        window.customElements.define('x-test', XTest);
+      }
+
+      test('upgraded document tree', function(done) {
+        if (CustomElements.useNative || !window.HTMLImports) {
+          return done();
+        } else {
+          window.addEventListener('WebComponentsReady', function() {
+            CustomElements.ready = false;
+            register();
+            assert.equal(created, 0, 'no elements created when ready explicitly set to false');
+            CustomElements.upgradeDocumentTree(document);
+            assert.equal(created, 3, 'elements in document tree upgraded via CustomElements.upgradeDocumentTree');
+            done();
+          });
+        }
+      });
+    </script>
+  </body>
+</html>

bower_components/webcomponentsjs/tests/dev-loader-swizzled.html

@@ -0,0 +1,32 @@
+<!doctype html>
+<!--
+@license
+Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+<html>
+  <head>
+    <title></title>
+    <meta charset="UTF-8">
+    <script src="../webcomponents-lite.js?0.13513513" log="foo,boo" squid="never" spoo></script>
+    <script src="../../web-component-tester/browser.js"></script>
+  </head>
+  <body>
+    <script>
+      suite('Development Loader Swizzeled', function() {
+        test('loader swizzeled', function() {
+          assert(window.WebComponents, 'Platform scope missing');
+          assert.equal(WebComponents.flags.squid, 'never', '"squid" flag missing');
+          assert(WebComponents.flags.spoo, '"spoo" flag missing');
+          assert(WebComponents.flags.log, 'flags.log missing');
+          assert(WebComponents.flags.log.foo, 'flags.log.foo missing');
+          assert(WebComponents.flags.log.boo, 'flags.log.foo missing');
+        });
+      });
+    </script>
+  </body>
+</html>

bower_components/webcomponentsjs/tests/dev-loader.html

@@ -0,0 +1,32 @@
+<!doctype html>
+<!--
+@license
+Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+<html>
+  <head>
+    <title></title>
+    <meta charset="UTF-8">
+    <script src="../webcomponents-lite.js" log="foo,boo" squid="never" spoo></script>
+    <script src="../../web-component-tester/browser.js"></script>
+  </head>
+  <body>
+    <script>
+      suite('Development Loader', function() {
+        test('loader', function() {
+          assert(window.WebComponents, 'WebComponents scope missing');
+          assert.equal(WebComponents.flags.squid, 'never', '"squid" flag missing');
+          assert(WebComponents.flags.spoo, '"spoo" flag missing');
+          assert(WebComponents.flags.log, 'flags.log missing');
+          assert(WebComponents.flags.log.foo, 'flags.log.foo missing');
+          assert(WebComponents.flags.log.boo, 'flags.log.foo missing');
+        });
+      });
+    </script>
+  </body>
+</html>

bower_components/webcomponentsjs/tests/force-polyfills.html

@@ -0,0 +1,40 @@
+<!doctype html>
+<!--
+@license
+Copyright (c) 2017 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+<html>
+
+<head>
+  <title>Force polyfills</title>
+  <meta charset="UTF-8">
+  <script>
+    window.ShadyDOM = {
+      force: true
+    };
+    if (window.customElements) customElements.forcePolyfill = true;
+    window.webComponentsReadyCount = 0;
+    window.addEventListener('WebComponentsReady', function() {
+      window.webComponentsReadyCount++;
+    });
+  </script>
+  <script src="../webcomponents-loader.js"></script>
+  <script src="../../web-component-tester/browser.js"></script>
+</head>
+
+<body>
+  <script>
+    suite('Force polyfill', function() {
+      test('expected boot', function() {
+        assert.equal(window.webComponentsReadyCount, 1, 'failed to fire WebComponentsReady');
+      });
+    });
+  </script>
+</body>
+
+</html>

bower_components/webcomponentsjs/tests/imports/a1-define.html

@@ -0,0 +1,32 @@
+<!--
+    @license
+    Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+    This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+    The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+    The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+    Code distributed by Google as part of the polymer project is also
+    subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+<script>
+(function() {
+
+  window.a1DocsList = [];
+
+  class A1 extends HTMLElement {
+    connectedCallback() {
+      a1DocsList.push(this.ownerDocument.baseURI.split('/').pop());
+      this.isA1 = true;
+    }
+  }
+  window.customElements.define('a-1', A1);
+
+
+  class SpecialStyle extends HTMLStyleElement {
+    connectedCallback() {
+      window.styleAppliedToDocument = Boolean(this.__appliedElement);
+    }
+  }
+  window.customElements.define('special-style', SpecialStyle);
+
+})();
+</script>

bower_components/webcomponentsjs/tests/imports/a1-import.html

@@ -0,0 +1,11 @@
+<!--
+@license
+Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+<link rel="import" href="a1-define.html">
+<link rel="import" href="a1-reference.html">

bower_components/webcomponentsjs/tests/imports/a1-instance.html

@@ -0,0 +1,12 @@
+<!--
+@license
+Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+<a-1></a-1>
+
+<style is="special-style"></style>

bower_components/webcomponentsjs/tests/imports/a1-reference.html

@@ -0,0 +1,19 @@
+<!--
+@license
+Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+<link rel="import" href="a1-instance.html">
+<a-1></a-1>
+<script>
+  // can reference upgraded instance in previous import when this script runs
+  var currentScript = document._currentScript || document.currentScript;
+  var l = currentScript.ownerDocument.querySelector('link');
+  var a1 = l.import.querySelector('a-1');
+  window.a1 = a1;
+  window.isA1Upgraded = a1.isA1;
+</script>

bower_components/webcomponentsjs/tests/imports/csp-import-1.html

@@ -0,0 +1,11 @@
+<!--
+    @license
+    Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+    This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+    The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+    The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+    Code distributed by Google as part of the polymer project is also
+    subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+<link rel="import" href="csp-import-2.html">
+<script src="csp-script-1.js"></script>

bower_components/webcomponentsjs/tests/imports/csp-import-2.html

@@ -0,0 +1,10 @@
+<!--
+    @license
+    Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+    This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+    The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+    The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+    Code distributed by Google as part of the polymer project is also
+    subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+<script src="csp-script-2.js"></script>

bower_components/webcomponentsjs/tests/imports/csp-script-1.js

@@ -0,0 +1,11 @@
+/**
+ * @license
+ * Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+ * This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+ * The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+ * The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+ * Code distributed by Google as part of the polymer project is also
+ * subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+ */
+
+window.externalScriptParsed1 = new Date().getTime();

bower_components/webcomponentsjs/tests/imports/csp-script-2.js

@@ -0,0 +1,11 @@
+/**
+ * @license
+ * Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+ * This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+ * The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+ * The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+ * Code distributed by Google as part of the polymer project is also
+ * subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+ */
+
+window.externalScriptParsed2 = new Date().getTime();

bower_components/webcomponentsjs/tests/imports/current-script.js

@@ -0,0 +1,13 @@
+/**
+ * @license
+ * Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+ * This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+ * The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+ * The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+ * Code distributed by Google as part of the polymer project is also
+ * subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+ */
+
+remoteCurrentScriptExecuted = window.remoteCurrentScriptExecuted || 0;
+remoteCurrentScriptExecuted++;
+assert.ok(document._currentScript);

bower_components/webcomponentsjs/tests/imports/element-import-a.html

@@ -0,0 +1,11 @@
+<!--
+@license
+Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+<x-test></x-test>
+<link rel="import" href="element-import-b.html">

bower_components/webcomponentsjs/tests/imports/element-import-b.html

@@ -0,0 +1,11 @@
+<!--
+@license
+Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+<x-test></x-test>
+<link rel="import" href="element-import-a.html">

bower_components/webcomponentsjs/tests/imports/element-import.html

@@ -0,0 +1,20 @@
+<!--
+@license
+Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+<x-foo></x-foo>
+<script>
+(function() {
+  class XFoo extends HTMLElement {
+    connectedCallback() {
+      this.isCreated = true;
+    }
+  }
+  window.customElements.define('x-foo', XFoo);
+})();
+</script>

bower_components/webcomponentsjs/tests/imports/import-file.html

@@ -0,0 +1,12 @@
+<!--
+    @license
+    Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+    This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+    The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+    The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+    Code distributed by Google as part of the polymer project is also
+    subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+<script>
+  window.importTest = true;
+</script>

bower_components/webcomponentsjs/tests/imports/import-upgrade-order.html

@@ -0,0 +1,10 @@
+<!--
+@license
+Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+<x-foo id="import"></x-foo>

bower_components/webcomponentsjs/tests/imports/script-1.html

@@ -0,0 +1,16 @@
+<!--
+    @license
+    Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+    This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+    The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+    The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+    Code distributed by Google as part of the polymer project is also
+    subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+<div>me</div>
+<script>
+  var d = document._currentScript.ownerDocument.querySelector('div');
+  assert.ok(document._currentScript);
+  assert.equal(d.innerHTML, 'me', '_currentScript can locate element in import')
+</script>
+<script src="current-script.js"></script>

bower_components/webcomponentsjs/tests/imports/script-2.html

@@ -0,0 +1,15 @@
+<!--
+    @license
+    Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+    This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+    The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+    The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+    Code distributed by Google as part of the polymer project is also
+    subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+<div>me2</div>
+<script>
+  var d = document._currentScript.ownerDocument.querySelector('div');
+  assert.equal(d.innerText, 'me2', '_currentScript can locate element in import')
+</script>
+<link rel="import" href="script-2.html">

bower_components/webcomponentsjs/tests/imports/simple-element-es5.html

@@ -0,0 +1,54 @@
+<!--
+@license
+Copyright (c) 2017 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+
+<script>
+  function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
+  function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }
+  function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
+
+  // Kick off shady CSS.
+  var template = document.createElement('template');
+  template.innerHTML =
+    `
+      <style>:host {color: blue;} .red-text {color: red;} </style>
+      <p class="red-text">Shadow DOM</p>
+      <slot id="slot"></slot>
+    `;
+  if (template) {
+    if (window.ShadyCSS) {
+      window.ShadyCSS.prepareTemplate(template, 'simple-element');
+    }
+  }
+
+  var SimpleElement = function (_HTMLElement) {
+    _inherits(SimpleElement, _HTMLElement);
+
+    function SimpleElement() {
+      _classCallCheck(this, SimpleElement);
+
+      var _this = _possibleConstructorReturn(this, (SimpleElement.__proto__ || Object.getPrototypeOf(SimpleElement)).call(this));
+
+      _this.bestName = 'batman';
+      if (window.ShadyCSS) {
+        window.ShadyCSS.styleElement(_this);
+      }
+
+      if (template && !_this.shadowRoot) {
+        _this.attachShadow({ mode: 'open' });
+        _this.shadowRoot.appendChild(document.importNode(template.content, true));
+      }
+      return _this;
+    }
+
+    return SimpleElement;
+  }(HTMLElement);
+
+  window.customElements.define('simple-element', SimpleElement);
+</script>

bower_components/webcomponentsjs/tests/imports/simple-element.html

@@ -0,0 +1,42 @@
+<!--
+@license
+Copyright (c) 2016 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+
+<script>
+  // Kick off shady CSS.
+  var template = document.createElement('template');
+  template.innerHTML =
+    `
+      <style>:host {color: blue;} .red-text {color: red;} </style>
+      <p class="red-text">Shadow DOM</p>
+      <slot id="slot"></slot>
+    `;
+  if (template) {
+    if (window.ShadyCSS) {
+      window.ShadyCSS.prepareTemplate(template, 'simple-element');
+    }
+  }
+
+  class SimpleElement extends HTMLElement {
+    constructor() {
+      super();
+      this.bestName = 'batman';
+      if (window.ShadyCSS) {
+        window.ShadyCSS.styleElement(this);
+      }
+
+      if (template && !this.shadowRoot) {
+        this.attachShadow({mode: 'open'});
+        this.shadowRoot.appendChild(document.importNode(template.content, true));
+      }
+    }
+  }
+
+  window.customElements.define('simple-element', SimpleElement);
+</script>

bower_components/webcomponentsjs/tests/integration-es5.html

@@ -0,0 +1,62 @@
+<!doctype html>
+<!--
+@license
+Copyright (c) 2017 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+<html>
+  <head>
+    <title>Integration Test</title>
+    <script src="../custom-elements-es5-adapter.js"></script>
+    <script src="../webcomponents-loader.js"></script>
+    <script src="../../web-component-tester/browser.js"></script>
+    <link rel="import" href="imports/simple-element-es5.html">
+  </head>
+  <body>
+
+    <!-- Don't break this into multiple lines or you'll have to count text nodes -->
+    <simple-element id="basic"><span>Light DOM</span></simple-element>
+
+    <script>
+      suite('integration es5', function() {
+        var el;
+
+        setup(function() {
+          el = document.querySelector('#basic');
+        });
+
+        test('element is imported & upgraded', function() {
+          assert.equal(el.bestName, 'batman',
+              'doesn\'t have property set in constructor');
+        });
+
+        test('element has shadow DOM content', function() {
+          var shadowRoot = el.shadowRoot;
+
+          assert.ok(shadowRoot, 'does not have a shadow root');
+          assert.equal(shadowRoot.querySelector('p').textContent, 'Shadow DOM',
+              'does not have <p> in the shadow dom');
+          assert.equal(getComputedStyle(shadowRoot.querySelector('p')).color, 'rgb(255, 0, 0)',
+              'does not style <p> in the shadow dom');
+        });
+
+        test('element has distributed content', function() {
+          var slot = el.shadowRoot.querySelector('slot');
+          assert.ok(slot, 'does not have a slot');
+
+          var distributedNodes = slot.assignedNodes()
+          assert.equal(distributedNodes.length, 1,
+                  'does not have exactly one element distributed');
+          assert.equal(distributedNodes[0].textContent, 'Light DOM',
+                  'does not have the right content distributed');
+          assert.equal(getComputedStyle(distributedNodes[0]).color, 'rgb(0, 0, 255)',
+              'does not style light dom');
+        });
+      });
+    </script>
+  </body>
+</html>

bower_components/webcomponentsjs/tests/integration.html

@@ -0,0 +1,61 @@
+<!doctype html>
+<!--
+@license
+Copyright (c) 2016 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+<html>
+  <head>
+    <title>Integration Test</title>
+    <script src="../webcomponents-loader.js"></script>
+    <script src="../../web-component-tester/browser.js"></script>
+    <link rel="import" href="imports/simple-element.html">
+  </head>
+  <body>
+
+    <!-- Don't break this into multiple lines or you'll have to count text nodes -->
+    <simple-element id="basic"><span>Light DOM</span></simple-element>
+
+    <script>
+      suite('integration', function() {
+        var el;
+
+        setup(function() {
+          el = document.querySelector('#basic');
+        });
+
+        test('element is imported & upgraded', function() {
+          assert.equal(el.bestName, 'batman',
+              'doesn\'t have property set in constructor');
+        });
+
+        test('element has shadow DOM content', function() {
+          var shadowRoot = el.shadowRoot;
+
+          assert.ok(shadowRoot, 'does not have a shadow root');
+          assert.equal(shadowRoot.querySelector('p').textContent, 'Shadow DOM',
+              'does not have <p> in the shadow dom');
+          assert.equal(getComputedStyle(shadowRoot.querySelector('p')).color, 'rgb(255, 0, 0)',
+              'does not style <p> in the shadow dom');
+        });
+
+        test('element has distributed content', function() {
+          var slot = el.shadowRoot.querySelector('slot');
+          assert.ok(slot, 'does not have a slot');
+
+          var distributedNodes = slot.assignedNodes()
+          assert.equal(distributedNodes.length, 1,
+                  'does not have exactly one element distributed');
+          assert.equal(distributedNodes[0].textContent, 'Light DOM',
+                  'does not have the right content distributed');
+          assert.equal(getComputedStyle(distributedNodes[0]).color, 'rgb(0, 0, 255)',
+              'does not style light dom');
+        });
+      });
+    </script>
+  </body>
+</html>

bower_components/webcomponentsjs/tests/load.html

@@ -0,0 +1,53 @@
+<!doctype html>
+<!--
+@license
+Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+<html>
+  <head>
+    <title></title>
+    <meta charset="UTF-8">
+    <script>
+      window.addEventListener('HTMLImportsLoaded', function() {
+        window.importsOk = true;
+      });
+      window.webComponentsReadyCount = 0;
+      document.addEventListener('WebComponentsReady', function() {
+        window.webComponentsReadyCount++;
+      });
+    </script>
+    <script src="../webcomponents-loader.js"></script>
+    <script src="../../web-component-tester/browser.js"></script>
+    <link rel="import" href="imports/import-file.html">
+  </head>
+  <body>
+    <my-element></my-element>
+    <script>
+      window.addEventListener('WebComponentsReady', () => {
+        class MyElement extends HTMLElement {
+          connectedCallback(){
+            this.textContent = 'upgraded!';
+          }
+        }
+        customElements.define('my-element', MyElement);
+      });
+      suite('Loader', function() {
+        test('expected boot', function() {
+          assert.equal(window.webComponentsReadyCount, 1, 'failed to fire WebComponentsReady');
+          if (window.HTMLImports) {
+            assert.ok(window.importsOk, 'WebComponentsReady without HTMLImportsLoaded');
+          }
+          assert.ok(window.importTest, 'import failed to set global value');
+        });
+        test('WebComponentsReady was fired on document and bubbled', function() {
+          assert.equal(document.querySelector('my-element').textContent, 'upgraded!');
+        })
+      });
+    </script>
+  </body>
+</html>

bower_components/webcomponentsjs/tests/promise.html

@@ -0,0 +1,45 @@
+<!doctype html>
+<!--
+@license
+Copyright (c) 2017 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+<html>
+  <head>
+    <title>Test Promise Polyfill</title>
+    <script>window.Promise = null;</script>
+    <script src="../webcomponents-loader.js"></script>
+    <script src="../../web-component-tester/browser.js"></script>
+  </head>
+  <body>
+    <script>
+      suite('Promise', () => {
+        test('Promise exists', () => {
+          assert(window.Promise);
+        });
+        test('resolve', () => {
+          return Promise.resolve('hi!');
+        });
+        test('reject', () => {
+          return Promise.reject('foo').then(() => {throw 'nope!'}, () => {});
+        });
+        test('race', () => {
+          return Promise.race([Promise.resolve(), Promise.resolve()]);
+        });
+        test('all', () => {
+          return Promise.all([Promise.resolve(), Promise.resolve()]);
+        });
+        test('catch', () => {
+          return Promise.reject('nope!').catch(() => {});
+        });
+        test('then', () => {
+          return Promise.resolve().then(() => {});
+        });
+      })
+    </script>
+  </body>
+</html>

bower_components/webcomponentsjs/tests/runner.html

@@ -0,0 +1,35 @@
+<!doctype html>
+<!--
+    @license
+    Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+    This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+    The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+    The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+    Code distributed by Google as part of the polymer project is also
+    subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+<title>All WebComponents Tests</title>
+<meta charset="utf-8">
+
+<!-- WebComponents -->
+<script src="../../web-component-tester/browser.js"></script>
+
+<script>
+  WCT.loadSuites([
+    'template-and-CE.html',
+    // 'template-and-imports.html',
+    'integration.html',
+    'integration-es5.html',
+    'load.html',
+    'force-polyfills.html',
+    'dev-loader.html',
+    'dev-loader-swizzled.html',
+    // 'smoke.html',
+    // 'ce-import.html',
+    // 'ce-upgradedocumenttree.html',  // Does not exist in the v1 polyfill
+    'ce-upgrade-order.html',
+    // 'ce-import-upgrade.html',  // Order of upgrade/import is different in v1
+    // 'ce-import-upgrade-async.html',
+    'promise.html'
+  ]);
+</script>

bower_components/webcomponentsjs/tests/smoke.html

@@ -0,0 +1,53 @@
+<!doctype html>
+<!--
+    @license
+    Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+    This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+    The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+    The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+    Code distributed by Google as part of the polymer project is also
+    subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+<html>
+  <head>
+    <title></title>
+    <meta charset="UTF-8">
+    <script src="../webcomponents-loader.js"></script>
+    <script src="../../web-component-tester/browser.js"></script>
+  </head>
+  <body>
+    <x-foo>plain</x-foo>
+
+    <script>
+      test('smoke', function(done) {
+        class XFoo extends HTMLElement {
+          connectedCallback() {
+            this.textContent = 'x-foo!';
+          }
+        }
+        window.customElements.define('x-foo', XFoo);
+        assert.equal(document.querySelector('x-foo').textContent, 'x-foo!',
+            'x-foo must have custom text');
+
+        class XZot extends HTMLElement {
+          connectedCallback() {
+            this.textContent = 'x-zot!';
+          }
+        }
+        window.customElements.define('x-zot', XZot);
+
+        var xfoo = document.querySelector('x-foo');
+        var root = xfoo.attachShadow({mode: 'open'});
+        var xzot = document.createElement('x-zot');
+
+        var handler = function() {
+          assert.equal(xzot.textContent, 'custom!', 'x-zot in shadow root must have custom text');
+          done();
+        }
+        var ob = new MutationObserver(handler);
+        ob.observe(root, {childList: true, subtree: true});
+        root.appendChild(xzot);
+      });
+    </script>
+  </body>
+</html>

bower_components/webcomponentsjs/tests/template-and-CE.html

@@ -0,0 +1,67 @@
+<!doctype html>
+<!--
+@license
+Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+<html>
+  <head>
+    <title>Template with HTMLImports Test</title>
+    <script src="../webcomponents-loader.js"></script>
+    <script src="../../web-component-tester/browser.js"></script>
+  </head>
+  <body>
+<body>
+
+    <template>
+      <x-child></x-child>
+    </template>
+
+    <template id="before"></template>
+    <x-after></x-after>
+
+    <script>
+      var created = [];
+      var attached = [];
+      var childCreated = false;
+      var foundTemplate = false;
+
+      class XChild extends HTMLElement {
+        constructor() {
+          super();
+          this.custom = true;
+          childCreated = true;
+        }
+      }
+
+      class XAfter extends HTMLElement {
+        constructor() {
+          super();
+          this.custom = true;
+
+          var template = document.querySelector('#before');
+          if (template && template.content) {
+            foundTemplate = true;
+          }
+        }
+      }
+
+      window.customElements.define('x-child', XChild);
+      window.customElements.define('x-after', XAfter);
+
+      suite('template and custom elements', function() {
+        test('elements within templates not upgraded', function() {
+          assert(!childCreated);
+        });
+
+        test('templates before elements are bootstrapped before createdCallback', function() {
+          assert(foundTemplate);
+        });
+      });
+    </script>
+  </body>
+</html>

bower_components/webcomponentsjs/tests/template-and-imports.html

@@ -0,0 +1,58 @@
+<!doctype html>
+<!--
+@license
+Copyright (c) 2015 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
+<html>
+  <head>
+    <title>Template with HTMLImports Test</title>
+    <script src="../webcomponents-loader.js"></script>
+    <script src="../../web-component-tester/browser.js"></script>
+  </head>
+  <body>
+    <template id="one">
+      <link rel="import" href="imports/script-1.html">
+    </template>
+
+    <template id="two">
+      <link rel="import" href="imports/csp-import-1.html">
+    </template>
+
+    <script>
+      suite('basic', function() {
+        var templateOne;
+        var templateTwo;
+
+        setup(function() {
+          templateOne = document.querySelector('template#one');
+          templateTwo = document.querySelector('template#two');
+        });
+
+        teardown(function() {
+          window.remoteCurrentScriptExecuted = undefined;
+          window.externalScriptParsed1 = undefined;
+        });
+
+        test('links are not imported before stamping', function() {
+          assert.equal(window.remoteCurrentScriptExecuted, undefined);
+          assert.equal(window.externalScriptParsed1, undefined);
+        });
+
+        test('links are imported when stamped', function(done) {
+          document.head.appendChild(document.importNode(templateTwo.content, true));
+
+          var imp = document.querySelector('[href="imports/csp-import-1.html"]');
+          imp.addEventListener('load', function() {
+            assert.ok(window.externalScriptParsed1);
+            done();
+          });
+        });
+      });
+    </script>
+  </body>
+</html>

bower_components/webcomponentsjs/wct.conf.json

@@ -0,0 +1,6 @@
+{
+  "suites": ["tests/runner.html"],
+  "clientOptions": {
+    "environmentImports": []
+  }
+}

bower_components/webcomponentsjs/webcomponents-hi-ce.js

@@ -0,0 +1,69 @@
+(function(){/*
+
+ Copyright (c) 2016 The Polymer Project Authors. All rights reserved.
+ This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+ The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+ The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+ Code distributed by Google as part of the polymer project is also
+ subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+*/
+'use strict';(function(a){function b(a,b){if("function"===typeof window.CustomEvent)return new CustomEvent(a,b);var d=document.createEvent("CustomEvent");d.initCustomEvent(a,!!b.bubbles,!!b.cancelable,b.detail);return d}function c(a){if(n)return a.ownerDocument!==document?a.ownerDocument:null;var b=a.__importDoc;if(!b&&a.parentNode){b=a.parentNode;if("function"===typeof b.closest)b=b.closest("link[rel=import]");else for(;!k(b)&&(b=b.parentNode););a.__importDoc=b}return b}function d(a){var b=document.querySelectorAll("link[rel=import]:not([import-dependency])"),
+d=b.length;d?h(b,function(b){return l(b,function(){0===--d&&a()})}):a()}function e(a){function b(){"loading"!==document.readyState&&document.body&&(document.removeEventListener("readystatechange",b),a())}document.addEventListener("readystatechange",b);b()}function f(a){e(function(){return d(function(){return a&&a()})})}function l(a,b){if(a.__loaded)b&&b();else if("script"===a.localName&&!a.src||"style"===a.localName&&!a.firstChild)a.__loaded=!0,b&&b();else{var d=function(c){a.removeEventListener(c.type,
+d);a.__loaded=!0;b&&b()};a.addEventListener("load",d);H&&"style"===a.localName||a.addEventListener("error",d)}}function k(a){return a.nodeType===Node.ELEMENT_NODE&&"link"===a.localName&&"import"===a.rel}function g(){var a=this;this.a={};this.b=0;this.g=new MutationObserver(function(b){return a.L(b)});this.g.observe(document.head,{childList:!0,subtree:!0});this.c(document)}function h(a,b,d){var c=a?a.length:0,e=d?-1:1;for(d=d?c-1:0;d<c&&0<=d;d+=e)b(a[d],d)}var n="import"in document.createElement("link"),
+I=null;!1==="currentScript"in document&&Object.defineProperty(document,"currentScript",{get:function(){return I||("complete"!==document.readyState?document.scripts[document.scripts.length-1]:null)},configurable:!0});var ua=/(url\()([^)]*)(\))/g,va=/(@import[\s]+(?!url\())([^;]*)(;)/g,wa=/(<link[^>]*)(rel=['|"]?stylesheet['|"]?[^>]*>)/g,r={J:function(a,b){a.href&&a.setAttribute("href",r.j(a.getAttribute("href"),b));a.src&&a.setAttribute("src",r.j(a.getAttribute("src"),b));if("style"===a.localName){var d=
+r.D(a.textContent,b,ua);a.textContent=r.D(d,b,va)}},D:function(a,b,d){return a.replace(d,function(a,d,c,e){a=c.replace(/["']/g,"");b&&(a=r.j(a,b));return d+"'"+a+"'"+e})},j:function(a,b){if(void 0===r.l){r.l=!1;try{var d=new URL("b","http://a");d.pathname="c%20d";r.l="http://a/c%20d"===d.href}catch(Qa){}}if(r.l)return(new URL(a,b)).href;d=r.G;d||(d=document.implementation.createHTMLDocument("temp"),r.G=d,d.w=d.createElement("base"),d.head.appendChild(d.w),d.v=d.createElement("a"));d.w.href=b;d.v.href=
+a;return d.v.href||a}},U={async:!0,load:function(a,b,d){if(a)if(a.match(/^data:/)){a=a.split(",");var c=a[1];c=-1<a[0].indexOf(";base64")?atob(c):decodeURIComponent(c);b(c)}else{var e=new XMLHttpRequest;e.open("GET",a,U.async);e.onload=function(){var a=e.responseURL||e.getResponseHeader("Location");a&&0===a.indexOf("/")&&(a=(location.origin||location.protocol+"//"+location.host)+a);var c=e.response||e.responseText;304===e.status||0===e.status||200<=e.status&&300>e.status?b(c,a):d(c)};e.send()}else d("error: href must be specified")}},
+H=/Trident/.test(navigator.userAgent)||/Edge\/\d./i.test(navigator.userAgent);g.prototype.c=function(a){var b=this;h(a.querySelectorAll("link[rel=import]"),function(a){return b.B(a)})};g.prototype.B=function(a){var b=this,d=a.href;if(void 0!==this.a[d]){var c=this.a[d];c&&c.__loaded&&(a.import=c,this.A(a))}else this.b++,this.a[d]="pending",U.load(d,function(a,c){a=b.M(a,c||d);b.a[d]=a;b.b--;b.c(a);b.C()},function(){b.a[d]=null;b.b--;b.C()})};g.prototype.M=function(a,b){if(!a)return document.createDocumentFragment();
+H&&(a=a.replace(wa,function(a,b,d){return-1===a.indexOf("type=")?b+" type=import-disable "+d:a}));var d=document.createElement("template");d.innerHTML=a;if(d.content)a=d.content;else for(a=document.createDocumentFragment();d.firstChild;)a.appendChild(d.firstChild);if(d=a.querySelector("base"))b=r.j(d.getAttribute("href"),b),d.removeAttribute("href");var c=0;h(a.querySelectorAll('link[rel=import], link[rel=stylesheet][href][type=import-disable],\n    style:not([type]), link[rel=stylesheet][href]:not([type]),\n    script:not([type]), script[type="application/javascript"],\n    script[type="text/javascript"]'),
+function(a){l(a);r.J(a,b);a.setAttribute("import-dependency","");"script"===a.localName&&!a.src&&a.textContent&&(a.setAttribute("src","data:text/javascript;charset=utf-8,"+encodeURIComponent(a.textContent+("\n//# sourceURL="+b+(c?"-"+c:"")+".js\n"))),a.textContent="",c++)});return a};g.prototype.C=function(){var a=this;if(!this.b){this.g.disconnect();this.flatten(document);var b=!1,d=!1,c=function(){d&&b&&(a.c(document),a.b||(a.g.observe(document.head,{childList:!0,subtree:!0}),a.K()))};this.P(function(){d=
+!0;c()});this.N(function(){b=!0;c()})}};g.prototype.flatten=function(a){var b=this;h(a.querySelectorAll("link[rel=import]"),function(a){var d=b.a[a.href];(a.import=d)&&d.nodeType===Node.DOCUMENT_FRAGMENT_NODE&&(b.a[a.href]=a,a.readyState="loading",a.import=a,b.flatten(d),a.appendChild(d))})};g.prototype.N=function(a){function b(e){if(e<c){var f=d[e],k=document.createElement("script");f.removeAttribute("import-dependency");h(f.attributes,function(a){return k.setAttribute(a.name,a.value)});I=k;f.parentNode.replaceChild(k,
+f);l(k,function(){I=null;b(e+1)})}else a()}var d=document.querySelectorAll("script[import-dependency]"),c=d.length;b(0)};g.prototype.P=function(a){var b=document.querySelectorAll("style[import-dependency],\n    link[rel=stylesheet][import-dependency]"),d=b.length;if(d){var e=H&&!!document.querySelector("link[rel=stylesheet][href][type=import-disable]");h(b,function(b){l(b,function(){b.removeAttribute("import-dependency");0===--d&&a()});if(e&&b.parentNode!==document.head){var f=document.createElement(b.localName);
+f.__appliedElement=b;f.setAttribute("type","import-placeholder");b.parentNode.insertBefore(f,b.nextSibling);for(f=c(b);f&&c(f);)f=c(f);f.parentNode!==document.head&&(f=null);document.head.insertBefore(b,f);b.removeAttribute("type")}})}else a()};g.prototype.K=function(){var a=this;h(document.querySelectorAll("link[rel=import]"),function(b){return a.A(b)},!0)};g.prototype.A=function(a){a.__loaded||(a.__loaded=!0,a.import&&(a.import.readyState="complete"),a.dispatchEvent(b(a.import?"load":"error",{bubbles:!1,
+cancelable:!1,detail:void 0})))};g.prototype.L=function(a){var b=this;h(a,function(a){return h(a.addedNodes,function(a){a&&a.nodeType===Node.ELEMENT_NODE&&(k(a)?b.B(a):b.c(a))})})};if(n){h(document.querySelectorAll("link[rel=import]"),function(a){a.import&&"loading"===a.import.readyState||(a.__loaded=!0)});var V=function(a){a=a.target;k(a)&&(a.__loaded=!0)};document.addEventListener("load",V,!0);document.addEventListener("error",V,!0)}else{var z=Object.getOwnPropertyDescriptor(Node.prototype,"baseURI");
+Object.defineProperty((!z||z.configurable?Node:Element).prototype,"baseURI",{get:function(){var a=k(this)?this:c(this);return a?a.href:z&&z.get?z.get.call(this):(document.querySelector("base")||window.location).href},configurable:!0,enumerable:!0});e(function(){return new g})}f(function(){return document.dispatchEvent(b("HTMLImportsLoaded",{cancelable:!0,bubbles:!0,detail:void 0}))});a.useNative=n;a.whenReady=f;a.importForElement=c})(window.HTMLImports=window.HTMLImports||{});var aa=new Set("annotation-xml color-profile font-face font-face-src font-face-uri font-face-format font-face-name missing-glyph".split(" "));function m(a){var b=aa.has(a);a=/^[a-z][.0-9_a-z]*-[\-.0-9_a-z]*$/.test(a);return!b&&a}function p(a){var b=a.isConnected;if(void 0!==b)return b;for(;a&&!(a.__CE_isImportDocument||a instanceof Document);)a=a.parentNode||(window.ShadowRoot&&a instanceof ShadowRoot?a.host:void 0);return!(!a||!(a.__CE_isImportDocument||a instanceof Document))}
+function q(a,b){for(;b&&b!==a&&!b.nextSibling;)b=b.parentNode;return b&&b!==a?b.nextSibling:null}
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+
+ Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+ This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+ The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+ The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+ Code distributed by Google as part of the polymer project is also
+ subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+*/
+var X=window.customElements,Y=window.HTMLImports,La=window.HTMLTemplateElement;window.WebComponents=window.WebComponents||{};if(X&&X.polyfillWrapFlushCallback){var Z,Ma=function(){if(Z){La.I&&La.I(window.document);var a=Z;Z=null;a();return!0}},Na=Y.whenReady;X.polyfillWrapFlushCallback(function(a){Z=a;Na(Ma)});Y.whenReady=function(a){Na(function(){Ma()?Y.whenReady(a):a()})}}
+Y.whenReady(function(){requestAnimationFrame(function(){window.WebComponents.ready=!0;document.dispatchEvent(new CustomEvent("WebComponentsReady",{bubbles:!0}))})});var Oa=document.createElement("style");Oa.textContent="body {transition: opacity ease-in 0.2s; } \nbody[unresolved] {opacity: 0; display: block; overflow: hidden; position: relative; } \n";var Pa=document.querySelector("head");Pa.insertBefore(Oa,Pa.firstChild);/*
+
+Copyright (c) 2017 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+*/
+}).call(this);
+
+//# sourceMappingURL=webcomponents-hi-ce.js.map

bower_components/webcomponentsjs/webcomponents-hi-sd-ce.js

@@ -0,0 +1,176 @@
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+ Copyright (c) 2016 The Polymer Project Authors. All rights reserved.
+ This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+ The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+ The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+ Code distributed by Google as part of the polymer project is also
+ subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+*/
+'use strict';var n,p="undefined"!=typeof window&&window===this?this:"undefined"!=typeof global&&null!=global?global:this,aa="function"==typeof Object.defineProperties?Object.defineProperty:function(a,b,c){a!=Array.prototype&&a!=Object.prototype&&(a[b]=c.value)};function ba(){ba=function(){};p.Symbol||(p.Symbol=da)}var da=function(){var a=0;return function(b){return"jscomp_symbol_"+(b||"")+a++}}();
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+ The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+ Code distributed by Google as part of the polymer project is also
+ subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+*/
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+
+//# sourceMappingURL=webcomponents-hi-sd-ce.js.map

bower_components/webcomponentsjs/webcomponents-hi.js

@@ -0,0 +1,44 @@
+(function(){/*
+
+ Copyright (c) 2016 The Polymer Project Authors. All rights reserved.
+ This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+ The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+ The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+ Code distributed by Google as part of the polymer project is also
+ subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+*/
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+cancelable:!1,detail:void 0})))};e.prototype.B=function(a){var b=this;k(a,function(a){return k(a.addedNodes,function(a){a&&a.nodeType===Node.ELEMENT_NODE&&(p(a)?b.m(a):b.c(a))})})};if(u){k(document.querySelectorAll("link[rel=import]"),function(a){a.import&&"loading"===a.import.readyState||(a.__loaded=!0)});var C=function(a){a=a.target;p(a)&&(a.__loaded=!0)};document.addEventListener("load",C,!0);document.addEventListener("error",C,!0)}else{var n=Object.getOwnPropertyDescriptor(Node.prototype,"baseURI");
+Object.defineProperty((!n||n.configurable?Node:Element).prototype,"baseURI",{get:function(){var a=p(this)?this:m(this);return a?a.href:n&&n.get?n.get.call(this):(document.querySelector("base")||window.location).href},configurable:!0,enumerable:!0});z(function(){return new e})}A(function(){return document.dispatchEvent(y("HTMLImportsLoaded",{cancelable:!0,bubbles:!0,detail:void 0}))});h.useNative=u;h.whenReady=A;h.importForElement=m})(window.HTMLImports=window.HTMLImports||{});/*
+
+ Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+ This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+ The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+ The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+ Code distributed by Google as part of the polymer project is also
+ subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+*/
+var r=window.customElements,t=window.HTMLImports,x=window.HTMLTemplateElement;window.WebComponents=window.WebComponents||{};if(r&&r.polyfillWrapFlushCallback){var D,E=function(){if(D){x.v&&x.v(window.document);var h=D;D=null;h();return!0}},F=t.whenReady;r.polyfillWrapFlushCallback(function(h){D=h;F(E)});t.whenReady=function(h){F(function(){E()?t.whenReady(h):h()})}}
+t.whenReady(function(){requestAnimationFrame(function(){window.WebComponents.ready=!0;document.dispatchEvent(new CustomEvent("WebComponentsReady",{bubbles:!0}))})});var G=document.createElement("style");G.textContent="body {transition: opacity ease-in 0.2s; } \nbody[unresolved] {opacity: 0; display: block; overflow: hidden; position: relative; } \n";var H=document.querySelector("head");H.insertBefore(G,H.firstChild);/*
+
+Copyright (c) 2017 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+*/
+}).call(this);
+
+//# sourceMappingURL=webcomponents-hi.js.map

bower_components/webcomponentsjs/webcomponents-lite.js

@@ -0,0 +1,195 @@
+(function(){/*
+
+ Copyright (c) 2016 The Polymer Project Authors. All rights reserved.
+ This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+ The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+ The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+ Code distributed by Google as part of the polymer project is also
+ subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+*/
+'use strict';var p,q="undefined"!=typeof window&&window===this?this:"undefined"!=typeof global&&null!=global?global:this,ba="function"==typeof Object.defineProperties?Object.defineProperty:function(a,b,c){a!=Array.prototype&&a!=Object.prototype&&(a[b]=c.value)};function ca(){ca=function(){};q.Symbol||(q.Symbol=da)}var da=function(){var a=0;return function(b){return"jscomp_symbol_"+(b||"")+a++}}();
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+Y.prototype.prepareTemplate=Y.prototype.prepareTemplate;Y.prototype.styleElement=Y.prototype.styleElement;Y.prototype.styleDocument=Y.prototype.styleDocument;Y.prototype.styleSubtree=Y.prototype.styleSubtree;Y.prototype.getComputedStyleValue=Y.prototype.getComputedStyleValue;Y.prototype.setElementClass=Y.prototype.Ya;Y.prototype._styleInfoForNode=Y.prototype.Ia;Y.prototype.transformCustomStyleForDocument=Y.prototype.va;Y.prototype.getStyleAst=Y.prototype.La;Y.prototype.styleAstToString=Y.prototype.Za;
+Y.prototype.flushCustomStyles=Y.prototype.F;Object.defineProperties(Y.prototype,{nativeShadow:{get:function(){return Q}},nativeCss:{get:function(){return R}}});var Z=new Y,Dg,Eg;window.ShadyCSS&&(Dg=window.ShadyCSS.ApplyShim,Eg=window.ShadyCSS.CustomStyleInterface);window.ShadyCSS={ScopingShim:Z,prepareTemplate:function(a,b,c){Z.F();Z.prepareTemplate(a,b,c)},styleSubtree:function(a,b){Z.F();Z.styleSubtree(a,b)},styleElement:function(a){Z.F();Z.styleElement(a)},styleDocument:function(a){Z.F();Z.styleDocument(a)},getComputedStyleValue:function(a,b){return Z.getComputedStyleValue(a,b)},nativeCss:R,nativeShadow:Q};Dg&&(window.ShadyCSS.ApplyShim=Dg);
+Eg&&(window.ShadyCSS.CustomStyleInterface=Eg);var Fg=window.customElements,Gg=window.HTMLImports,Hg=window.HTMLTemplateElement;window.WebComponents=window.WebComponents||{};if(Fg&&Fg.polyfillWrapFlushCallback){var Ig,Jg=function(){if(Ig){Hg.J&&Hg.J(window.document);var a=Ig;Ig=null;a();return!0}},Kg=Gg.whenReady;Fg.polyfillWrapFlushCallback(function(a){Ig=a;Kg(Jg)});Gg.whenReady=function(a){Kg(function(){Jg()?Gg.whenReady(a):a()})}}
+Gg.whenReady(function(){requestAnimationFrame(function(){window.WebComponents.ready=!0;document.dispatchEvent(new CustomEvent("WebComponentsReady",{bubbles:!0}))})});var Lg=document.createElement("style");Lg.textContent="body {transition: opacity ease-in 0.2s; } \nbody[unresolved] {opacity: 0; display: block; overflow: hidden; position: relative; } \n";var Mg=document.querySelector("head");Mg.insertBefore(Lg,Mg.firstChild);}).call(this);
+
+//# sourceMappingURL=webcomponents-lite.js.map

bower_components/webcomponentsjs/webcomponents-loader.js

@@ -0,0 +1,74 @@
+/**
+ * @license
+ * Copyright (c) 2017 The Polymer Project Authors. All rights reserved.
+ * This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+ * The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+ * The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+ * Code distributed by Google as part of the polymer project is also
+ * subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+ */
+
+(function() {
+  'use strict';
+  // global for (1) existence means `WebComponentsReady` will file,
+  // (2) WebComponents.ready == true means event has fired.
+  window.WebComponents = window.WebComponents || {};
+  var name = 'webcomponents-loader.js';
+  // Feature detect which polyfill needs to be imported.
+  var polyfills = [];
+  if (!('import' in document.createElement('link'))) {
+    polyfills.push('hi');
+  }
+  if (!('attachShadow' in Element.prototype && 'getRootNode' in Element.prototype) ||
+    (window.ShadyDOM && window.ShadyDOM.force)) {
+    polyfills.push('sd');
+  }
+  if (!window.customElements || window.customElements.forcePolyfill) {
+    polyfills.push('ce');
+  }
+  // NOTE: any browser that does not have template or ES6 features
+  // must load the full suite (called `lite` for legacy reasons) of polyfills.
+  if (!('content' in document.createElement('template')) || !window.Promise || !Array.from ||
+    // Edge has broken fragment cloning which means you cannot clone template.content
+    !(document.createDocumentFragment().cloneNode() instanceof DocumentFragment)) {
+    polyfills = ['lite'];
+  }
+
+  if (polyfills.length) {
+    var script = document.querySelector('script[src*="' + name +'"]');
+    var newScript = document.createElement('script');
+    // Load it from the right place.
+    var replacement = 'webcomponents-' + polyfills.join('-') + '.js';
+    var url = script.src.replace(name, replacement);
+    newScript.src = url;
+    // NOTE: this is required to ensure the polyfills are loaded before
+    // *native* html imports load on older Chrome versions. This *is* CSP
+    // compliant since CSP rules must have allowed this script to run.
+    // In all other cases, this can be async.
+    if (document.readyState === 'loading' && ('import' in document.createElement('link'))) {
+      document.write(newScript.outerHTML);
+    } else {
+      document.head.appendChild(newScript);
+    }
+  } else {
+    // Ensure `WebComponentsReady` is fired also when there are no polyfills loaded.
+    // however, we have to wait for the document to be in 'interactive' state,
+    // otherwise a rAF may fire before scripts in <body>
+
+    var fire = function() {
+      requestAnimationFrame(function() {
+        window.WebComponents.ready = true;
+        document.dispatchEvent(new CustomEvent('WebComponentsReady', {bubbles: true}));
+      });
+    };
+
+    if (document.readyState !== 'loading') {
+      fire();
+    } else {
+      document.addEventListener('readystatechange', function wait() {
+        fire();
+        document.removeEventListener('readystatechange', wait);
+      });
+    }
+  }
+})();

bower_components/webcomponentsjs/webcomponents-sd-ce.js

@@ -0,0 +1,151 @@
+(function(){/*
+
+Copyright (c) 2016 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+*/
+'use strict';var n,p="undefined"!=typeof window&&window===this?this:"undefined"!=typeof global&&null!=global?global:this,aa="function"==typeof Object.defineProperties?Object.defineProperty:function(a,b,c){a!=Array.prototype&&a!=Object.prototype&&(a[b]=c.value)};function ba(){ba=function(){};p.Symbol||(p.Symbol=ca)}var ca=function(){var a=0;return function(b){return"jscomp_symbol_"+(b||"")+a++}}();
+function da(){ba();var a=p.Symbol.iterator;a||(a=p.Symbol.iterator=p.Symbol("iterator"));"function"!=typeof Array.prototype[a]&&aa(Array.prototype,a,{configurable:!0,writable:!0,value:function(){return ea(this)}});da=function(){}}function ea(a){var b=0;return fa(function(){return b<a.length?{done:!1,value:a[b++]}:{done:!0}})}function fa(a){da();a={next:a};a[p.Symbol.iterator]=function(){return this};return a}function ha(a){da();var b=a[Symbol.iterator];return b?b.call(a):ea(a)}
+function ia(a){for(var b,c=[];!(b=a.next()).done;)c.push(b.value);return c}var r=window.ShadyDOM||{};r.va=!(!Element.prototype.attachShadow||!Node.prototype.getRootNode);var ja=Object.getOwnPropertyDescriptor(Node.prototype,"firstChild");r.F=!!(ja&&ja.configurable&&ja.get);r.ga=r.force||!r.va;function t(a){return a.__shady&&void 0!==a.__shady.firstChild}function u(a){return"ShadyRoot"===a.ma}function ka(a){a=a.getRootNode();if(u(a))return a}
+var v=Element.prototype,la=v.matches||v.matchesSelector||v.mozMatchesSelector||v.msMatchesSelector||v.oMatchesSelector||v.webkitMatchesSelector;function ma(a,b){if(a&&b)for(var c=Object.getOwnPropertyNames(b),d=0,e;d<c.length&&(e=c[d]);d++){var f=Object.getOwnPropertyDescriptor(b,e);f&&Object.defineProperty(a,e,f)}}function na(a,b){for(var c=[],d=1;d<arguments.length;++d)c[d-1]=arguments[d];for(d=0;d<c.length;d++)ma(a,c[d]);return a}function oa(a,b){for(var c in b)a[c]=b[c]}
+var pa=document.createTextNode(""),qa=0,ra=[];(new MutationObserver(function(){for(;ra.length;)try{ra.shift()()}catch(a){throw pa.textContent=qa++,a;}})).observe(pa,{characterData:!0});function sa(a){ra.push(a);pa.textContent=qa++}var ta=!!document.contains;function ua(a,b){for(;b;){if(b==a)return!0;b=b.parentNode}return!1};var va=[],wa;function xa(a){wa||(wa=!0,sa(ya));va.push(a)}function ya(){wa=!1;for(var a=!!va.length;va.length;)va.shift()();return a}ya.list=va;function za(){this.a=!1;this.addedNodes=[];this.removedNodes=[];this.M=new Set}function Aa(a){a.a||(a.a=!0,sa(function(){Ba(a)}))}function Ba(a){if(a.a){a.a=!1;var b=a.takeRecords();b.length&&a.M.forEach(function(a){a(b)})}}za.prototype.takeRecords=function(){if(this.addedNodes.length||this.removedNodes.length){var a=[{addedNodes:this.addedNodes,removedNodes:this.removedNodes}];this.addedNodes=[];this.removedNodes=[];return a}return[]};
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+function Ea(a,b){var c=b.getRootNode();return a.map(function(a){var b=c===a.target.getRootNode();if(b&&a.addedNodes){if(b=Array.from(a.addedNodes).filter(function(a){return c===a.getRootNode()}),b.length)return a=Object.create(a),Object.defineProperty(a,"addedNodes",{value:b,configurable:!0}),a}else if(b)return a}).filter(function(a){return a})};var w={},Fa=Element.prototype.insertBefore,Ga=Element.prototype.removeChild,Ha=Element.prototype.setAttribute,Ia=Element.prototype.removeAttribute,Ja=Element.prototype.cloneNode,Ka=Document.prototype.importNode,La=Element.prototype.addEventListener,Ma=Element.prototype.removeEventListener,Na=Window.prototype.addEventListener,Oa=Window.prototype.removeEventListener,Pa=Element.prototype.dispatchEvent,Qa=Element.prototype.querySelector,Ra=Element.prototype.querySelectorAll,Sa=Node.prototype.contains||
+HTMLElement.prototype.contains;w.appendChild=Element.prototype.appendChild;w.insertBefore=Fa;w.removeChild=Ga;w.setAttribute=Ha;w.removeAttribute=Ia;w.cloneNode=Ja;w.importNode=Ka;w.addEventListener=La;w.removeEventListener=Ma;w.Fa=Na;w.Ga=Oa;w.dispatchEvent=Pa;w.querySelector=Qa;w.querySelectorAll=Ra;w.contains=Sa;var Ta=/[&\u00A0"]/g,Ua=/[&\u00A0<>]/g;function Va(a){switch(a){case "&":return"&amp;";case "<":return"&lt;";case ">":return"&gt;";case '"':return"&quot;";case "\u00a0":return"&nbsp;"}}function Wa(a){for(var b={},c=0;c<a.length;c++)b[a[c]]=!0;return b}var Xa=Wa("area base br col command embed hr img input keygen link meta param source track wbr".split(" ")),Ya=Wa("style script xmp iframe noembed noframes plaintext noscript".split(" "));
+function Za(a,b){"template"===a.localName&&(a=a.content);for(var c="",d=b?b(a):a.childNodes,e=0,f=d.length,h;e<f&&(h=d[e]);e++){a:{var g=h;var k=a;var l=b;switch(g.nodeType){case Node.ELEMENT_NODE:for(var m=g.localName,q="<"+m,H=g.attributes,N=0;k=H[N];N++)q+=" "+k.name+'="'+k.value.replace(Ta,Va)+'"';q+=">";g=Xa[m]?q:q+Za(g,l)+"</"+m+">";break a;case Node.TEXT_NODE:g=g.data;g=k&&Ya[k.localName]?g:g.replace(Ua,Va);break a;case Node.COMMENT_NODE:g="\x3c!--"+g.data+"--\x3e";break a;default:throw window.console.error(g),
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+x.children=function(a){var b=[];z.currentNode=a;for(a=z.firstChild();a;)b.push(a),a=z.nextSibling();return b};x.innerHTML=function(a){return Za(a,function(a){return $a(a)})};x.textContent=function(a){switch(a.nodeType){case Node.ELEMENT_NODE:case Node.DOCUMENT_FRAGMENT_NODE:a=document.createTreeWalker(a,NodeFilter.SHOW_TEXT,null,!1);for(var b="",c;c=a.nextNode();)b+=c.nodeValue;return b;default:return a.nodeValue}};var ab=Object.getOwnPropertyDescriptor(Element.prototype,"innerHTML")||Object.getOwnPropertyDescriptor(HTMLElement.prototype,"innerHTML"),bb=document.implementation.createHTMLDocument("inert"),cb=Object.getOwnPropertyDescriptor(Document.prototype,"activeElement"),db={parentElement:{get:function(){var a=this.__shady&&this.__shady.parentNode;a&&a.nodeType!==Node.ELEMENT_NODE&&(a=null);return void 0!==a?a:x.parentElement(this)},configurable:!0},parentNode:{get:function(){var a=this.__shady&&this.__shady.parentNode;
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+void 0!==this.__shady.nextSibling){for(var a=this.nextSibling;a&&a.nodeType!==Node.ELEMENT_NODE;)a=a.nextSibling;return a}return x.nextElementSibling(this)},configurable:!0},previousElementSibling:{get:function(){if(this.__shady&&void 0!==this.__shady.previousSibling){for(var a=this.previousSibling;a&&a.nodeType!==Node.ELEMENT_NODE;)a=a.previousSibling;return a}return x.previousElementSibling(this)},configurable:!0}},eb={childNodes:{get:function(){if(t(this)){if(!this.__shady.childNodes){this.__shady.childNodes=
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+ The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+ The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+ Code distributed by Google as part of the polymer project is also
+ subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+*/
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+Copyright (c) 2017 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+*/
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+
+//# sourceMappingURL=webcomponents-sd-ce.js.map

index.html

@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <meta charset="UTF-8">
+        <meta name="viewport" content="width=device-width, initial-scale=1.0">
+        <script type="text/javascript" src="/bower_components/webcomponentsjs/webcomponents-lite.js"></script>
+        <script src="src/components/cat-img.js"></script>
+    </head>
+
+    <body>
+        <h1>WebComponents workshop</h1>
+        <p>In this workshop, we will create new custom HTML Components</p>
+
+        <cat-img></cat-img>
+
+        <hr>
+        <div>
+            <button onclick="removeCatImg()">Click me to remove CatImg</button>
+        </div>
+
+        <div>
+            <input type="text" id="cat-img-param" value="SensorFact">        
+            <button onclick="changeCatImgParam()">Click me to change CatImg's parameter</button>        
+        </div>   
+        <hr>
+        
+        <script>
+            function removeCatImg(){
+                const catImgElement = document.getElementsByTagName("cat-img")[0];
+                catImgElement.parentNode.removeChild(catImgElement);
+            }
+        </script>
+        <script>
+            function changeCatImgParam(){
+                const catImgElement = document.getElementsByTagName("cat-img")[0];
+                const catImgParam = document.getElementById("cat-img-param").value;
+                document.getElementsByTagName("cat-img")[0].setAttribute("name", catImgParam);
+            }
+        </script>
+    </body>
+</html>

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+}

package.json

@@ -0,0 +1,31 @@
+{
+  "name": "web-components-workshop",
+  "version": "1.0.0",
+  "description": "A short workshop on web components, with exercises",
+  "main": "index.html",
+  "dependencies": {
+    "http-server": "^0.10.0"
+  },
+  "devDependencies": {},
+  "scripts": {
+    "start": "node ./node_modules/.bin/http-server",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/jlengrand/web-components-workshop.git"
+  },
+  "keywords": [
+    "web-components",
+    "shadydom",
+    "shadowdom",
+    "custom-elements",
+    "polymer"
+  ],
+  "author": "Julien Lengrand-Lambert <julien@lengrand.fr>",
+  "license": "ISC",
+  "bugs": {
+    "url": "https://github.com/jlengrand/web-components-workshop/issues"
+  },
+  "homepage": "https://github.com/jlengrand/web-components-workshop#readme"
+}

src/components/cat-img.js

@@ -0,0 +1,19 @@
+class CatImgElement extends HTMLElement {
+
+    constructor(){
+        super()
+    }    
+
+    connectedCallback(){
+        this.innerHTML = `<h1>Hello Meetup !</h1>`;
+        console.log("I'm here!");
+    }
+
+    disconnectedCallback(){
+        console.log("I'm gone!");
+    }
+}
+
+window.customElements.define(
+                'cat-img', 
+                    CatImgElement);