feat: add preset remote imports

import-map.json

@@ -0,0 +1,12 @@
+{
+  "imports": {
+    "lit-html": "https://cdn.skypack.dev/lit-html",
+    "@mdjs/mdjs-story": "https://cdn.skypack.dev/@mdjs/mdjs-story",
+    "demo-wc-card": "https://cdn.skypack.dev/demo-wc-card",
+    "@rocket/search": "https://cdn.skypack.dev/@rocket/search",
+    "@rocket/navigation": "https://cdn.skypack.dev/@rocket/navigation",
+    "@rocket/drawer": "https://cdn.skypack.dev/@rocket/drawer",
+    "@mdjs/mdjs-preview": "https://cdn.skypack.dev/@mdjs/mdjs-preview",
+    "@rocket/launch": "https://cdn.skypack.dev/@rocket/launch"
+  }
+}

packages/generate-import-map/README.md

@@ -0,0 +1,28 @@
+# Check HTML Links
+
+A fast checker for broken links/references in HTML.
+
+## Installation
+
+```
+npm i -D check-html-links
+```
+
+## Usage
+
+```
+npx check-html-links _site
+```
+
+For docs please see our homepage [https://rocket.modern-web.dev/docs/tools/check-html-links/](https://rocket.modern-web.dev/docs/tools/check-html-links/).
+
+## Comparison
+
+Checking the output of the [11ty-website](https://github.com/11ty/11ty-website) with 13 missing reference targets (used by 516 links) while checking 501 files. (on January 17, 2021)
+
+| Tool             | Lines printed | Times  | Lang | Dependency Tree |
+| ---------------- | ------------- | ------ | ---- | --------------- |
+| check-html-links | 38            | ~2.5s  | node | 19              |
+| link-checker     | 3000+         | ~11s   | node | 106             |
+| hyperlink        | 68            | 4m 20s | node | 481             |
+| htmltest         | 1000+         | ~0.7s  | GO   | -               |

packages/generate-import-map/index.js

@@ -0,0 +1 @@
+export { inspectFolder } from './src/inspectFolder.js';

packages/generate-import-map/package.json

@@ -0,0 +1,47 @@
+{
+  "name": "generate-import-map",
+  "version": "0.0.1",
+  "publishConfig": {
+    "access": "public"
+  },
+  "description": "A fast low dependency generator of import map",
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/modernweb-dev/rocket.git",
+    "directory": "packages/generate-import-map"
+  },
+  "author": "Modern Web <hello@modern-web.dev> (https://modern-web.dev/)",
+  "homepage": "https://rocket.modern-web.dev/docs/tools/generate-import-map/",
+  "bin": {
+    "generate-import-map": "src/cli.js"
+  },
+  "type": "module",
+  "exports": {
+    ".": "./index.js"
+  },
+  "scripts": {
+    "test": "mocha --timeout 5000 test-node/**/*.test.{js,cjs} test-node/*.test.{js,cjs}",
+    "test:watch": "onchange 'src/**/*.{js,cjs}' 'test-node/**/*.{js,cjs}' -- npm test",
+    "types:copy": "copyfiles \"./types/**/*.d.ts\" dist-types/"
+  },
+  "files": [
+    "*.js",
+    "dist",
+    "dist-types",
+    "src"
+  ],
+  "dependencies": {
+    "chalk": "^4.0.0",
+    "es-module-lexer": "^0.3.26",
+    "glob": "^7.0.0",
+    "node-fetch": "^2.6.1",
+    "sax-wasm": "^2.0.0"
+  },
+  "devDependencies": {
+    "@types/es-module-lexer": "^0.3.0",
+    "@types/glob": "^7.0.0",
+    "@types/node-fetch": "^2.5.8"
+  },
+  "types": "dist-types/index.d.ts"
+}

packages/generate-import-map/src/cli.js

@@ -0,0 +1,54 @@
+#!/usr/bin/env node
+
+import path from 'path';
+import chalk from 'chalk';
+import { extractBareImports } from './inspectFolder.js';
+import { checkRemoteSpecifiers, createImportMap } from './createImportMap.js';
+import { listFiles } from './listFiles.js';
+
+async function main() {
+  const userRootDir = process.argv[2];
+  const userImportMapDist = process.argv[3];
+  const remoteUrl = process.argv[4];
+  const rootDir = userRootDir ? path.resolve(userRootDir) : process.cwd();
+  const importMapDist = userImportMapDist
+    ? path.resolve(userImportMapDist)
+    : `${process.cwd()}/import-map.json`;
+
+  const performanceInspectStart = process.hrtime();
+
+  console.log('👀 Looking for all imports...');
+  const files = await listFiles('**/*.html', rootDir);
+
+  const filesOutput =
+    files.length == 0
+      ? '🧐 No files to check. Did you select the correct folder?'
+      : `🔥 Found a total of ${chalk.green.bold(files.length)} files to check!`;
+  console.log(filesOutput);
+
+  const { localSpecifiers, bareSpecifiers } = await extractBareImports(files, rootDir);
+  const performanceInspectEnd = process.hrtime(performanceInspectStart);
+
+  console.log(
+    `🔗 Found a total of ${chalk.green.bold(
+      localSpecifiers.length,
+    )} local imports and ${chalk.green.bold(bareSpecifiers.length)} bare imports!`,
+  );
+  console.log(
+    `✅ Files inspected. (executed in %ds %dms)`,
+    performanceInspectEnd[0],
+    performanceInspectEnd[1] / 1000000,
+  );
+
+  const performanceRemoteStart = process.hrtime();
+  const foundBareSpecifiers = await checkRemoteSpecifiers(bareSpecifiers, remoteUrl);
+  createImportMap(foundBareSpecifiers, remoteUrl, importMapDist);
+  const performanceRemoteEnd = process.hrtime(performanceRemoteStart);
+  console.log(
+    `✅ Remote CDN check and import map created. (executed in %ds %dms)`,
+    performanceRemoteEnd[0],
+    performanceRemoteEnd[1] / 1000000,
+  );
+}
+
+main();

packages/generate-import-map/src/createImportMap.js

@@ -0,0 +1,48 @@
+import fs from 'fs';
+import path from 'path';
+import fetch from 'node-fetch';
+
+export const defaultRemoteUrl = 'https://cdn.skypack.dev/';
+export const defaultImportMapDist = path.resolve('./import-map.json');
+
+/**
+ *
+ * @param {string[]} bareSpecifiers
+ * @param {string} remoteUrl
+ */
+export async function checkRemoteSpecifiers(bareSpecifiers, remoteUrl = defaultRemoteUrl) {
+  /** @type {Promise<void>[]} */
+  const promises = [];
+  /** @type {string[]} */
+  const result = [];
+  bareSpecifiers.forEach(specifier => {
+    const remoteSpecifier = `${remoteUrl}${specifier}`;
+    const promise = fetch(remoteSpecifier).then(response => {
+      if (response.ok) {
+        result.push(specifier);
+      }
+    });
+    promises.push(promise);
+  });
+  await Promise.all(promises);
+  return result;
+}
+
+/**
+ *
+ * @param {string[]} bareSpecifiers
+ * @param {string} remoteUrl
+ * @param {string} importMapDist
+ */
+export function createImportMap(
+  bareSpecifiers,
+  remoteUrl = defaultRemoteUrl,
+  importMapDist = defaultImportMapDist,
+) {
+  const imports = {};
+  bareSpecifiers.forEach(specifier => {
+    const remoteSpecifier = `${remoteUrl}${specifier}`;
+    imports[specifier] = remoteSpecifier;
+  });
+  fs.writeFileSync(importMapDist, JSON.stringify({ imports }, null, 2));
+}

packages/generate-import-map/src/inspectFolder.js

@@ -0,0 +1,197 @@
+/* eslint-disable @typescript-eslint/ban-ts-comment */
+import fs from 'fs';
+import saxWasm from 'sax-wasm';
+import { createRequire } from 'module';
+import { init, parse } from 'es-module-lexer';
+
+import { listFiles } from './listFiles.js';
+import path from 'path';
+
+/** @typedef {import('../types/main').Script} Script */
+/** @typedef {import('../types/main').Import} Import */
+/** @typedef {import('sax-wasm').Attribute} Attribute */
+/** @typedef {import('sax-wasm').Tag} Tag */
+/** @typedef {import('sax-wasm').Text} Text */
+/** @typedef {import('es-module-lexer').ImportSpecifier} ImportSpecifier */
+
+const require = createRequire(import.meta.url);
+const { SaxEventType, SAXParser } = saxWasm;
+
+const streamOptions = { highWaterMark: 256 * 1024 };
+
+const saxPath = require.resolve('sax-wasm/lib/sax-wasm.wasm');
+const saxWasmBuffer = fs.readFileSync(saxPath);
+const parserSpecifiers = new SAXParser(
+  SaxEventType.OpenTag | SaxEventType.CloseTag | SaxEventType.Attribute | SaxEventType.Text,
+  streamOptions,
+);
+
+let localSpecifiers = new Set();
+let bareSpecifiers = new Set();
+
+/**
+ * @param {string} filePath
+ * @param {object} option
+ * @param {string} option.rootDir
+ */
+function analyzeFile(filePath, { rootDir }) {
+  if (fs.existsSync(filePath) && !fs.lstatSync(filePath).isDirectory()) {
+    const source = fs.readFileSync(filePath, { encoding: 'utf-8' });
+    const importDir = path.dirname(filePath);
+    console.log('Resolving specifier %s', filePath);
+    getSpecifiers(source).forEach(specifier => {
+      addSpecifier(specifier, { importDir, rootDir });
+    });
+  }
+}
+
+/**
+ * @param {string} source
+ */
+function getSpecifiers(source) {
+  /** @type {[ImportSpecifier[], string[]]} */
+  const [imports] = parse(source, 'optional-sourcename');
+  return imports.map(specifier => source.substring(specifier.s, specifier.e).replace(/'/g, ''));
+}
+
+/**
+ *
+ * @param {string} specifier
+ * @param {object} options
+ * @param {string} options.importDir
+ * @param {string} options.rootDir
+ */
+function addSpecifier(specifier, { importDir, rootDir }) {
+  let newSpecifier = specifier.trim();
+  if (newSpecifier.endsWith('/')) {
+    newSpecifier += 'index.js';
+  }
+
+  if (newSpecifier.startsWith('/')) {
+    // Absolute path specifier
+    newSpecifier = path.join(rootDir, newSpecifier);
+  } else if (newSpecifier.startsWith('../') || newSpecifier.startsWith('./')) {
+    // Relative path specifier
+    newSpecifier = path.join(importDir, newSpecifier);
+  }
+
+  if (newSpecifier.startsWith('/')) {
+    if (!localSpecifiers.has(newSpecifier)) {
+      localSpecifiers.add(newSpecifier);
+      analyzeFile(newSpecifier, { rootDir });
+    }
+  } else {
+    const [namespace, name] = newSpecifier.split('/');
+    if (namespace.startsWith('@')) {
+      newSpecifier = `${namespace}/${name}`;
+    } else {
+      newSpecifier = namespace;
+    }
+    bareSpecifiers.add(newSpecifier);
+  }
+}
+/**
+ *
+ * @param {Script[]} scripts
+ * @param {object} options
+ * @param {string} options.importDir
+ * @param {string} options.rootDir
+ */
+async function resolveSpecifiers(scripts, { importDir, rootDir }) {
+  for (const scriptObj of scripts) {
+    if (scriptObj.specifier) {
+      addSpecifier(scriptObj.specifier, { importDir, rootDir });
+    } else {
+      getSpecifiers(scriptObj.content).forEach(specifier => {
+        addSpecifier(specifier, { importDir, rootDir });
+      });
+    }
+  }
+}
+
+/**
+ * @param {string} filePath
+ */
+function extractScripts(filePath) {
+  /** @type {Script[]} */
+  const scripts = [];
+
+  let captureContent = false;
+
+  parserSpecifiers.eventHandler = (ev, /** @type {any} */ _data) => {
+    const data = /** @type {Tag | Text} */ _data;
+    if (captureContent && ev === SaxEventType.Text) {
+      const scriptObj = scripts[scripts.length - 1];
+      scriptObj.content += data.value;
+    } else if (ev === SaxEventType.CloseTag && data.name.toString() === 'script') {
+      captureContent = false;
+    } else if (ev === SaxEventType.OpenTag) {
+      const tagName = data.name.toString();
+      const type = data.attributes.find(
+        (/** @type Attribute */ attr) => attr.name.toString() === 'type',
+      );
+      if (tagName === 'script' && type?.value.toString() === 'module') {
+        const scriptObj = /** @type {Script} */ {
+          filePath,
+          content: '',
+          specifier: '',
+        };
+        const src = data.attributes.find(
+          (/** @type Attribute */ attr) => attr.name.toString() === 'src',
+        );
+        if (src) {
+          let srcPath = src.value.toString().trim();
+          if (!srcPath.startsWith('.') || !srcPath.startsWith('/')) {
+            srcPath = `./${srcPath}`;
+          }
+          scriptObj.specifier = srcPath;
+        } else {
+          captureContent = true;
+        }
+        scripts.push(scriptObj);
+      }
+    }
+  };
+
+  return new Promise(resolve => {
+    const readable = fs.createReadStream(filePath, streamOptions);
+    readable.on('data', chunk => {
+      // @ts-expect-error
+      parserSpecifiers.write(chunk);
+    });
+    readable.on('end', () => {
+      parserSpecifiers.end();
+      resolve(scripts);
+    });
+  });
+}
+
+/**
+ * @param {string[]} files
+ * @param {string} rootDir
+ */
+export async function extractBareImports(files, rootDir) {
+  await parserSpecifiers.prepareWasm(saxWasmBuffer);
+  await init;
+
+  localSpecifiers = new Set();
+  bareSpecifiers = new Set();
+  for (const filePath of files) {
+    const importDir = path.dirname(filePath);
+    const scripts = await extractScripts(filePath);
+    await resolveSpecifiers(scripts, { importDir, rootDir });
+  }
+  return {
+    localSpecifiers: Array.from(localSpecifiers),
+    bareSpecifiers: Array.from(bareSpecifiers),
+  };
+}
+
+/**
+ * @param {string} inRootDir
+ */
+export async function inspectFolder(inRootDir, extension = 'html') {
+  const rootDir = path.resolve(inRootDir);
+  const files = await listFiles(`**/*.${extension}`, rootDir);
+  return await extractBareImports(files, rootDir);
+}

packages/generate-import-map/src/listFiles.js

@@ -0,0 +1,34 @@
+import fs from 'fs';
+import path from 'path';
+import glob from 'glob';
+
+/**
+ * Lists all files using the specified glob, starting from the given root directory.
+ *
+ * Will return all matching file paths fully resolved.
+ *
+ * @param {string} fromGlob
+ * @param {string} rootDir
+ */
+export function listFiles(fromGlob, rootDir) {
+  return new Promise(resolve => {
+    glob(
+      fromGlob,
+      { cwd: rootDir },
+      /**
+       * @param {Error | null} er
+       * @param {string[]} files
+       */
+      (er, files) => {
+        // remember, each filepath returned is relative to rootDir
+        resolve(
+          files
+            // fully resolve the filename relative to rootDir
+            .map(filePath => path.resolve(rootDir, filePath))
+            // filter out directories
+            .filter(filePath => !fs.lstatSync(filePath).isDirectory()),
+        );
+      },
+    );
+  });
+}

packages/generate-import-map/test-node/fixtures/script-content/index.html

@@ -0,0 +1,12 @@
+<script>
+	import "/empty.js";
+</script>
+<script>
+	import "./empty.js";
+</script>
+<script>
+	import "./empty.js ";
+</script>
+<script>
+	import " ./empty.js ";
+</script>

packages/generate-import-map/test-node/fixtures/script-src/index.html

@@ -0,0 +1,4 @@
+<script src="/empty.js"></script>
+<script src="./empty.js"></script>
+<script src="./empty.js "></script>
+<script src=" ./empty.js "></script>

packages/generate-import-map/test-node/fixtures/test-case/components/index.js

@@ -0,0 +1 @@
+export { TestComponent } from './src/TestComponent.js';

packages/generate-import-map/test-node/fixtures/test-case/components/src/TestComponent.js

@@ -0,0 +1,3 @@
+import { LitElement } from 'lit-element';
+
+export class TestElement extends LitElement {}

packages/generate-import-map/test-node/fixtures/test-case/components/test-component.js

@@ -0,0 +1,3 @@
+import { TestComponent } from './src/TestComponent.js';
+
+window.customElements.define('test-element', TestComponent);

packages/generate-import-map/test-node/fixtures/test-case/index.html

@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+	<meta charset="UTF-8">
+	<meta name="viewport" content="width=device-width, initial-scale=1.0">
+	<title>Document</title>
+	<script src="scripts/main.js" type="module"></script>
+</head>
+<body>
+	<div id="app"></div>
+</body>
+</html>

packages/generate-import-map/test-node/fixtures/test-case/overview.html

@@ -0,0 +1,545 @@
+<!doctype html>
+
+<html lang="en" dir="ltr">
+
+
+
+    <head>
+
+    <link rel="stylesheet" href="/_merged_assets/rocket-blog.css">
+
+
+    <link
+  href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@400;700&display=swap"
+  rel="stylesheet"
+/>
+<link
+  href="https://fonts.googleapis.com/css2?family=Montserrat:wght@400;700&display=swap"
+  rel="stylesheet"
+/>
+<meta name="twitter:creator" content="@modern_web_dev" />
+
+
+
+
+
+
+
+
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1.0">
+<title>Markdown JavaScript: Overview: Rocket</title>
+<meta property="og:title" content="Markdown JavaScript: Overview: Rocket"/>
+
+<meta name="generator" content="rocket 0.1">
+<link rel="canonical" href="/docs/markdown-javascript/overview/"/>
+
+
+
+<meta name="description" content="Rocket is the way to build fast static websites with a sprinkle of JavaScript"/>
+<meta property="og:description" content="Rocket is the way to build fast static websites with a sprinkle of JavaScript"/>
+
+
+    <link rel="apple-touch-icon" sizes="180x180" href="/_merged_assets/_static/icons/apple-touch-icon.png">
+<link rel="icon" type="image/png" sizes="32x32" href="/_merged_assets/_static/icons/favicon-32x32.png">
+<link rel="icon" type="image/png" sizes="16x16" href="/_merged_assets/_static/icons/favicon-16x16.png">
+<link rel="manifest" href="/_merged_assets/webmanifest.json">
+<link rel="mask-icon" href="/_merged_assets/_static/icons/safari-pinned-tab.svg" color="#3f93ce">
+<meta name="msapplication-TileColor" content="#1d3557">
+<meta name="theme-color" content="#1d3557">
+
+
+    <meta property="og:site_name" content="Rocket"/>
+<meta property="og:type" content="website"/>
+
+<meta property="og:image" content="/_merged_assets/11ty-img/f8d62426-1200.png"/>
+<meta property="og:url" content="/docs/markdown-javascript/overview/"/>
+
+<meta name="twitter:card" content="summary_large_image"/>
+
+
+    <link rel="stylesheet" href="/_merged_assets/variables.css">
+<link rel="stylesheet" href="/_merged_assets/layout.css">
+<link rel="stylesheet" href="/_merged_assets/markdown.css">
+<link rel="stylesheet" href="/_merged_assets/style.css">
+
+
+    <noscript><link rel="stylesheet" href="/_merged_assets/_static/noscript.css"/></noscript>
+
+
+</head>
+
+
+
+
+  <body layout="layout-sidebar">
+
+
+
+      <header id="main-header">
+  <div class="content-area">
+
+      <button id="mobile-menu-trigger" data-action="trigger-mobile-menu">
+	<span class="sr-only">Show Menu</span>
+	      <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" role="img" viewbox="0 0 448 512" class="icon">
+        <path fill="currentColor" d="M436 124H12c-6.627 0-12-5.373-12-12V80c0-6.627 5.373-12 12-12h424c6.627 0 12 5.373 12 12v32c0 6.627-5.373 12-12 12zm0 160H12c-6.627 0-12-5.373-12-12v-32c0-6.627 5.373-12 12-12h424c6.627 0 12 5.373 12 12v32c0 6.627-5.373 12-12 12zm0 160H12c-6.627 0-12-5.373-12-12v-32c0-6.627 5.373-12 12-12h424c6.627 0 12 5.373 12 12v32c0 6.627-5.373 12-12 12z"></path>
+      </svg>
+
+</button>
+
+
+
+	<a class="logo-link" href="/">
+  <img src="/_merged_assets/logo.svg" alt="Rocket Logo" />
+  <span>Rocket</span>
+</a>
+
+
+
+
+      <rocket-search class="search" json-url="/_merged_assets/_static/rocket-search-index.json">
+  <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 129 129" style="width: 25px;">
+    <path d="M51.6 96.7c11 0 21-3.9 28.8-10.5l35 35c.8.8 1.8 1.2 2.9 1.2s2.1-.4 2.9-1.2c1.6-1.6 1.6-4.2 0-5.8l-35-35c6.5-7.8 10.5-17.9 10.5-28.8 0-24.9-20.2-45.1-45.1-45.1-24.8 0-45.1 20.3-45.1 45.1 0 24.9 20.3 45.1 45.1 45.1zm0-82c20.4 0 36.9 16.6 36.9 36.9C88.5 72 72 88.5 51.6 88.5S14.7 71.9 14.7 51.6c0-20.3 16.6-36.9 36.9-36.9z"/>
+  </svg>
+</rocket-search>
+
+<script type="module">
+  import '@rocket/search/rocket-search.js';
+</script>
+
+
+
+  <a href="/guides/" class="
+
+
+        ">Guides</a>
+  <a href="/docs/" class="
+
+           active
+        ">Docs</a>
+  <a href="/blog/" class="
+
+
+        ">Blog</a>
+
+
+      <launch-dark-switch class="light-dark-switch" label="Toggle darkmode">Toggle darkmode</launch-dark-switch>
+
+
+
+
+	<a class="social-link" href="https://github.com/modernweb-dev/rocket" aria-label="Rocket on GitHub" rel="noopener noreferrer" target="_blank">
+		<span class="sr-only">GitHub</span>
+
+			<svg xmlns="http://www.w3.org/2000/svg" viewbox="0 0 17 16" fill="none">
+  <title>GitHub</title>
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+        <main class="markdown-body">
+
+    <h1 id="markdown-javascript-overview"><a class="anchor" href="#markdown-javascript-overview"><svg class="octicon octicon-link" viewBox="0 0 16 16" aria-hidden="true" width="16" height="16"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Markdown JavaScript: Overview</h1>
+<p>Markdown JavaScript (mdjs) is a format that allows you to use JavaScript with Markdown, to create interactive demos. It does so by "annotating" JavaScript that should be executed in Markdown.</p>
+<p>To annotate we use a code block with <code>js script</code>.</p>
+<pre class="language-md"><code class="language-md"><span class="token code"><span class="token punctuation">```</span><span class="token code-language">js script</span>
+<span class="token code-block language-js"><span class="token comment">// execute me</span></span>
+<span class="token punctuation">```</span></span>
+</code></pre>
+<h2 id="web-components"><a class="anchor" href="#web-components"><svg class="octicon octicon-link" viewBox="0 0 16 16" aria-hidden="true" width="16" height="16"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Web Components</h2>
+<p>One very good use case for that can be web components.
+HTML already works in Markdown so all you need is to load a web components definition file.</p>
+<p>You could even do so within the same Markdown file.</p>
+<pre class="language-md"><code class="language-md"><span class="token title important"><span class="token punctuation">##</span> This is my-card</span>
+
+Here's an example of the component:
+
+<span class="token code"><span class="token punctuation">```</span><span class="token code-language">html preview-story</span>
+<span class="token code-block language-html"><span class="token tag"><span class="token tag"><span class="token punctuation">&#x3C;</span>my-card</span><span class="token punctuation">></span></span>
+  <span class="token tag"><span class="token tag"><span class="token punctuation">&#x3C;</span>h2</span><span class="token punctuation">></span></span>Hello world!<span class="token tag"><span class="token tag"><span class="token punctuation">&#x3C;/</span>h2</span><span class="token punctuation">></span></span>
+  <span class="token tag"><span class="token tag"><span class="token punctuation">&#x3C;</span>button</span><span class="token punctuation">></span></span>Click me!<span class="token tag"><span class="token tag"><span class="token punctuation">&#x3C;/</span>button</span><span class="token punctuation">></span></span>
+<span class="token tag"><span class="token tag"><span class="token punctuation">&#x3C;/</span>my-card</span><span class="token punctuation">></span></span></span>
+<span class="token punctuation">```</span></span>
+</code></pre>
+<p>You can even execute some JavaScript:</p>
+<pre class="language-md"><code class="language-md"><span class="token title important"><span class="token punctuation">##</span> This is my-el</span>
+
+<span class="token tag"><span class="token tag"><span class="token punctuation">&#x3C;</span>my-el</span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&#x3C;/</span>my-el</span><span class="token punctuation">></span></span>
+
+<span class="token code"><span class="token punctuation">```</span><span class="token code-language">js script</span>
+<span class="token code-block language-js"><span class="token keyword module">import</span> <span class="token punctuation">{</span> <span class="token maybe-class-name">LitElement</span><span class="token punctuation">,</span> html <span class="token punctuation">}</span> <span class="token keyword module">from</span> <span class="token string">'https://unpkg.com/lit-element?module'</span><span class="token punctuation">;</span>
+
+<span class="token keyword">class</span> <span class="token class-name">MyEl</span> <span class="token keyword">extends</span> <span class="token class-name">LitElement</span> <span class="token punctuation">{</span>
+  <span class="token function">render</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
+    <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token property-access">innerHTML</span> <span class="token operator">=</span> <span class="token string">'&#x3C;p style="color: red">I am alive&#x3C;/p>'</span><span class="token punctuation">;</span>
+  <span class="token punctuation">}</span>
+<span class="token punctuation">}</span>
+
+customElements<span class="token punctuation">.</span><span class="token method function property-access">define</span><span class="token punctuation">(</span><span class="token string">'my-el'</span><span class="token punctuation">,</span> <span class="token maybe-class-name">MyEl</span><span class="token punctuation">)</span><span class="token punctuation">;</span></span>
+<span class="token punctuation">```</span></span>
+</code></pre>
+<h2 id="demo-support-story"><a class="anchor" href="#demo-support-story"><svg class="octicon octicon-link" viewBox="0 0 16 16" aria-hidden="true" width="16" height="16"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Demo Support (Story)</h2>
+<p>mdjs comes with some additional helpers you can choose to import:</p>
+<pre class="language-md"><code class="language-md"><span class="token code"><span class="token punctuation">```</span><span class="token code-language">js script</span>
+<span class="token code-block language-js"><span class="token keyword module">import</span> <span class="token string">'@mdjs/mdjs-story/mdjs-story.js'</span><span class="token punctuation">;</span>
+<span class="token keyword module">import</span> <span class="token string">'@mdjs/mdjs-preview/mdjs-preview.js'</span><span class="token punctuation">;</span></span>
+<span class="token punctuation">```</span></span>
+</code></pre>
+<p>Once loaded you can use them like so:</p>
+<pre class="language-md"><code class="language-md"><span class="token code"><span class="token punctuation">```</span><span class="token code-language">js script</span>
+<span class="token code-block language-js"><span class="token keyword module">import</span> <span class="token string">'@mdjs/mdjs-story/mdjs-story.js'</span><span class="token punctuation">;</span>
+<span class="token keyword module">import</span> <span class="token string">'@mdjs/mdjs-preview/mdjs-preview.js'</span><span class="token punctuation">;</span></span>
+<span class="token punctuation">```</span></span>
+</code></pre>
+<h3 id="story"><a class="anchor" href="#story"><svg class="octicon octicon-link" viewBox="0 0 16 16" aria-hidden="true" width="16" height="16"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Story</h3>
+<p>The code snippet will actually get executed at that place and you will have a live demo</p>
+<pre class="language-md"><code class="language-md"><span class="token code"><span class="token punctuation">```</span><span class="token code-language">js story</span>
+<span class="token code-block language-js"><span class="token keyword module">export</span> <span class="token keyword">const</span> <span class="token function-variable function"><span class="token maybe-class-name">JsStory</span></span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token arrow operator">=></span> html<span class="token template-string"><span class="token template-punctuation string">`</span><span class="token embedded-code html"> &#x3C;demo-wc-card>JS Story&#x3C;/demo-wc-card> </span><span class="token template-punctuation string">`</span></span><span class="token punctuation">;</span></span>
+<span class="token punctuation">```</span></span>
+</code></pre>
+<pre class="language-md"><code class="language-md"><span class="token code"><span class="token punctuation">```</span><span class="token code-language">html story</span>
+<span class="token code-block language-html"><span class="token tag"><span class="token tag"><span class="token punctuation">&#x3C;</span>demo-wc-card</span><span class="token punctuation">></span></span>HTML Story<span class="token tag"><span class="token tag"><span class="token punctuation">&#x3C;/</span>demo-wc-card</span><span class="token punctuation">></span></span></span>
+<span class="token punctuation">```</span></span>
+</code></pre>
+<h4 id="full-code-support"><a class="anchor" href="#full-code-support"><svg class="octicon octicon-link" viewBox="0 0 16 16" aria-hidden="true" width="16" height="16"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Full Code Support</h4>
+<pre class="language-md"><code class="language-md"><span class="token code"><span class="token punctuation">```</span><span class="token code-language">js story</span>
+<span class="token code-block language-js"><span class="token keyword module">export</span> <span class="token keyword">const</span> <span class="token function-variable function"><span class="token maybe-class-name">JsStory</span></span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token arrow operator">=></span> <span class="token punctuation">{</span>
+  <span class="token keyword">const</span> calculateSomething <span class="token operator">=</span> <span class="token number">12</span><span class="token punctuation">;</span>
+  <span class="token keyword">return</span> html<span class="token template-string"><span class="token template-punctuation string">`</span><span class="token embedded-code html">
+    &#x3C;demo-wc-card .header=${`Something: ${calculateSomething}`}>JS Story&#x3C;/demo-wc-card>
+  </span><span class="token template-punctuation string">`</span></span><span class="token punctuation">;</span>
+<span class="token punctuation">}</span><span class="token punctuation">;</span></span>
+<span class="token punctuation">```</span></span>
+</code></pre>
+<h3 id="preview-story"><a class="anchor" href="#preview-story"><svg class="octicon octicon-link" viewBox="0 0 16 16" aria-hidden="true" width="16" height="16"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Preview Story</h3>
+<p>Will become a live demo wrapped in a container with a show code button.</p>
+<pre class="language-md"><code class="language-md"><span class="token code"><span class="token punctuation">```</span><span class="token code-language">js preview-story</span>
+<span class="token code-block language-js"><span class="token keyword module">export</span> <span class="token keyword">const</span> <span class="token function-variable function"><span class="token maybe-class-name">JsPreviewStory</span></span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token arrow operator">=></span> html<span class="token template-string"><span class="token template-punctuation string">`</span><span class="token embedded-code html"> &#x3C;demo-wc-card>JS Preview Story&#x3C;/demo-wc-card> </span><span class="token template-punctuation string">`</span></span><span class="token punctuation">;</span></span>
+<span class="token punctuation">```</span></span>
+</code></pre>
+<pre class="language-md"><code class="language-md"><span class="token code"><span class="token punctuation">```</span><span class="token code-language">html preview-story</span>
+<span class="token code-block language-html"><span class="token tag"><span class="token tag"><span class="token punctuation">&#x3C;</span>demo-wc-card</span><span class="token punctuation">></span></span>HTML Preview Story<span class="token tag"><span class="token tag"><span class="token punctuation">&#x3C;/</span>demo-wc-card</span><span class="token punctuation">></span></span></span>
+<span class="token punctuation">```</span></span>
+</code></pre>
+<p>Here is a live example from <a href="https://www.npmjs.com/package/demo-wc-card">demo-wc-card</a>.</p>
+<mdjs-preview mdjs-story-name="header"></mdjs-preview>
+<h2 id="supported-systems"><a class="anchor" href="#supported-systems"><svg class="octicon octicon-link" viewBox="0 0 16 16" aria-hidden="true" width="16" height="16"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Supported Systems</h2>
+<h3 id="es-dev-server"><a class="anchor" href="#es-dev-server"><svg class="octicon octicon-link" viewBox="0 0 16 16" aria-hidden="true" width="16" height="16"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>es-dev-server</h3>
+<p>Preview your mdjs readme with live demos and auto reload.</p>
+<ul>
+<li>
+<p>Add to your <code>package.json</code>:</p>
+<pre class="language-json"><code class="language-json"><span class="token property">"scripts"</span><span class="token operator">:</span> <span class="token punctuation">{</span>
+  <span class="token property">"start"</span><span class="token operator">:</span> <span class="token string">"es-dev-server"</span><span class="token punctuation">,</span>
+<span class="token punctuation">}</span>
+</code></pre>
+</li>
+<li>
+<p>Create a <code>es-dev-server.config.js</code> in the root of your repository.</p>
+<pre class="language-js"><code class="language-js"><span class="token keyword">const</span> <span class="token punctuation">{</span> mdjsTransformer <span class="token punctuation">}</span> <span class="token operator">=</span> <span class="token function">require</span><span class="token punctuation">(</span><span class="token string">'@mdjs/core'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
+
+module<span class="token punctuation">.</span><span class="token property-access">exports</span> <span class="token operator">=</span> <span class="token punctuation">{</span>
+  nodeResolve<span class="token punctuation">:</span> <span class="token boolean">true</span><span class="token punctuation">,</span>
+  open<span class="token punctuation">:</span> <span class="token string">'README.md'</span><span class="token punctuation">,</span>
+  watch<span class="token punctuation">:</span> <span class="token boolean">true</span><span class="token punctuation">,</span>
+  responseTransformers<span class="token punctuation">:</span> <span class="token punctuation">[</span>mdjsTransformer<span class="token punctuation">]</span><span class="token punctuation">,</span>
+<span class="token punctuation">}</span><span class="token punctuation">;</span>
+</code></pre>
+</li>
+</ul>
+<h3 id="storybook"><a class="anchor" href="#storybook"><svg class="octicon octicon-link" viewBox="0 0 16 16" aria-hidden="true" width="16" height="16"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Storybook</h3>
+<p>Please check out <a href="https://open-wc.org/demoing/">@open-wc/demoing-storybook</a> for a fully integrated setup.</p>
+<p>It includes <a href="https://open-wc.org/demoing/storybook-addon-markdown-docs.html">storybook-addon-markdown-docs</a> which uses mdjs under the hood.</p>
+<h3 id="chrome-extension-currently-only-for-github"><a class="anchor" href="#chrome-extension-currently-only-for-github"><svg class="octicon octicon-link" viewBox="0 0 16 16" aria-hidden="true" width="16" height="16"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Chrome Extension (currently only for GitHub)</h3>
+<p>See live demos directly inside GitHub pages, Markdown files, issues, pull requests...</p>
+<p>Please check out <a href="https://github.com/open-wc/mdjs-viewer">mdjs-viewer</a>.</p>
+<h2 id="build-mdjs"><a class="anchor" href="#build-mdjs"><svg class="octicon octicon-link" viewBox="0 0 16 16" aria-hidden="true" width="16" height="16"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Build mdjs</h2>
+<h3 id="basic"><a class="anchor" href="#basic"><svg class="octicon octicon-link" viewBox="0 0 16 16" aria-hidden="true" width="16" height="16"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Basic</h3>
+<p>mdjs offers two more "basic" integrations</p>
+<h4 id="mdjsdocpage"><a class="anchor" href="#mdjsdocpage"><svg class="octicon octicon-link" viewBox="0 0 16 16" aria-hidden="true" width="16" height="16"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a><code>mdjsDocPage</code></h4>
+<p>Creates a full blown HTML page by passing in the Markdown.</p>
+<pre class="language-js"><code class="language-js"><span class="token keyword">const</span> <span class="token punctuation">{</span> mdjsDocPage <span class="token punctuation">}</span> <span class="token operator">=</span> <span class="token function">require</span><span class="token punctuation">(</span><span class="token string">'@mdjs/core'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
+
+<span class="token keyword">const</span> page <span class="token operator">=</span> <span class="token keyword">await</span> <span class="token function">mdjsDocPage</span><span class="token punctuation">(</span>markdownString<span class="token punctuation">)</span><span class="token punctuation">;</span>
+<span class="token comment">/*
+&#x3C;html>
+  ... // load styles/components for mdjs, start stories
+  &#x3C;body>
+    &#x3C;h1>Some Markdown&#x3C;/h1>
+  &#x3C;/body>
+&#x3C;/html>
+*/</span>
+</code></pre>
+<h4 id="mdjsprocess"><a class="anchor" href="#mdjsprocess"><svg class="octicon octicon-link" viewBox="0 0 16 16" aria-hidden="true" width="16" height="16"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a><code>mdjsProcess</code></h4>
+<p>Pass in multiple Markdown documents and you get back all the JavaScript code and rendered HTML.</p>
+<pre class="language-js"><code class="language-js"><span class="token keyword">const</span> <span class="token punctuation">{</span> mdjsProcess <span class="token punctuation">}</span> <span class="token operator">=</span> <span class="token function">require</span><span class="token punctuation">(</span><span class="token string">'@mdjs/core'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
+
+<span class="token keyword">const</span> data <span class="token operator">=</span> <span class="token keyword">await</span> <span class="token function">mdjsProcess</span><span class="token punctuation">(</span>markdownString<span class="token punctuation">)</span><span class="token punctuation">;</span>
+<span class="token console class-name">console</span><span class="token punctuation">.</span><span class="token method function property-access">log</span><span class="token punctuation">(</span>data<span class="token punctuation">)</span><span class="token punctuation">;</span>
+<span class="token comment">/*
+{
+  jsCode: "
+    import '@mdjs/mdjs-story/mdjs-story.js';
+    ...
+  ",
+  html: '&#x3C;h1>Markdown One&#x3C;/h1>',
+}
+*/</span>
+</code></pre>
+<h3 id="advanced"><a class="anchor" href="#advanced"><svg class="octicon octicon-link" viewBox="0 0 16 16" aria-hidden="true" width="16" height="16"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Advanced</h3>
+<p>mdjs is build to be integrated within the <a href="https://unifiedjs.com/">unifiedjs</a> system.</p>
+<pre class="language-js"><code class="language-js"><span class="token keyword">const</span> unified <span class="token operator">=</span> <span class="token function">require</span><span class="token punctuation">(</span><span class="token string">'unified'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
+<span class="token keyword">const</span> markdown <span class="token operator">=</span> <span class="token function">require</span><span class="token punctuation">(</span><span class="token string">'remark-parse'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
+<span class="token keyword">const</span> htmlStringify <span class="token operator">=</span> <span class="token function">require</span><span class="token punctuation">(</span><span class="token string">'remark-html'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
+<span class="token keyword">const</span> mdjsParse <span class="token operator">=</span> <span class="token function">require</span><span class="token punctuation">(</span><span class="token string">'@mdjs/core'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
+
+<span class="token keyword">const</span> parser <span class="token operator">=</span> <span class="token function">unified</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token method function property-access">use</span><span class="token punctuation">(</span>markdown<span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token method function property-access">use</span><span class="token punctuation">(</span>mdjsParse<span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token method function property-access">use</span><span class="token punctuation">(</span>htmlStringify<span class="token punctuation">)</span><span class="token punctuation">;</span>
+<span class="token keyword">const</span> result <span class="token operator">=</span> <span class="token keyword">await</span> parser<span class="token punctuation">.</span><span class="token method function property-access">process</span><span class="token punctuation">(</span>body<span class="token punctuation">)</span><span class="token punctuation">;</span>
+<span class="token keyword">const</span> <span class="token punctuation">{</span> jsCode <span class="token punctuation">}</span> <span class="token operator">=</span> result<span class="token punctuation">.</span><span class="token property-access">data</span><span class="token punctuation">;</span>
+<span class="token console class-name">console</span><span class="token punctuation">.</span><span class="token method function property-access">log</span><span class="token punctuation">(</span>result<span class="token punctuation">.</span><span class="token property-access">contents</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
+<span class="token comment">// &#x3C;h1>This is my-el>&#x3C;/h1></span>
+<span class="token comment">// &#x3C;my-el>&#x3C;/my-el></span>
+<span class="token console class-name">console</span><span class="token punctuation">.</span><span class="token method function property-access">log</span><span class="token punctuation">(</span>jsCode<span class="token punctuation">)</span><span class="token punctuation">;</span>
+<span class="token comment">// customElements.define('my-el', class extends HTMLElement {</span>
+<span class="token comment">// ...</span>
+</code></pre>
+        <script type="module">
+          import '@mdjs/mdjs-story/mdjs-story.js';
+import '@mdjs/mdjs-preview/mdjs-preview.js';
+import { html } from 'lit-html';
+import 'demo-wc-card/demo-wc-card.js';
+export const header = () => {
+  return html`<demo-wc-card .header=${'my new header'}></demo-wc-card>`;
+};
+const rootNode = document;
+const stories = [{ key: 'header', story: header, code: `<pre class="language-js"><code class="language-js"><span class="token keyword module">import</span> <span class="token string">'demo-wc-card/demo-wc-card.js'</span><span class="token punctuation">;</span>
+<span class="token keyword module">export</span> <span class="token keyword">const</span> <span class="token function-variable function">header</span> <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token arrow operator">=></span> <span class="token punctuation">{</span>
+  <span class="token keyword">return</span> html<span class="token template-string"><span class="token template-punctuation string">\`</span><span class="token html language-html"> <span class="token tag"><span class="token tag"><span class="token punctuation">&#x3C;</span>demo-wc-card</span> <span class="token attr-name">.header</span><span class="token attr-value"><span class="token punctuation">=</span><span class="token interpolation"><span class="token interpolation-punctuation punctuation">\${</span><span class="token string">'my new header'</span><span class="token interpolation-punctuation punctuation">}</span></span></span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation">&#x3C;/</span>demo-wc-card</span><span class="token punctuation">></span></span> </span><span class="token template-punctuation string">\`</span></span><span class="token punctuation">;</span>
+<span class="token punctuation">}</span><span class="token punctuation">;</span>
+</code></pre>` }];
+for (const story of stories) {
+  const storyEl = rootNode.querySelector(`[mdjs-story-name="${story.key}"]`);
+  storyEl.codeHasHtml = true;
+  storyEl.story = story.story;
+  storyEl.code = story.code;
+};
+if (!customElements.get('mdjs-preview')) { import('@mdjs/mdjs-preview/mdjs-preview.js'); }
+if (!customElements.get('mdjs-story')) { import('@mdjs/mdjs-story/mdjs-story.js'); }
+        </script>
+
+
+
+    <div class="content-footer">
+  <p>
+    Caught a mistake or want to contribute to the documentation?
+    <a href="https://github.com/modernweb-dev/rocket/edit/main/./docs/docs/markdown-javascript/overview.md">Edit this page on GitHub!</a>
+  </p>
+</div>
+
+
+</main>
+
+
+    </div>
+  </div>
+
+
+
+      <footer id="main-footer">
+
+
+
+
+    <div id="footer-menu">
+  <div class="content-area">
+
+      <nav>
+        <h3>Discover</h3>
+        <ul>
+
+            <li>
+              <a href="/blog/">Blog</a>
+            </li>
+
+            <li>
+              <a href="https://github.com/modernweb-dev/rocket/issues">Help and Feedback</a>
+            </li>
+
+        </ul>
+      </nav>
+
+      <nav>
+        <h3>Follow</h3>
+        <ul>
+
+            <li>
+              <a href="https://github.com/modernweb-dev/rocket">GitHub</a>
+            </li>
+
+            <li>
+              <a href="https://twitter.com/modern_web_dev">Twitter</a>
+            </li>
+
+            <li>
+              <a href="/about/slack/">Slack</a>
+            </li>
+
+        </ul>
+      </nav>
+
+      <nav>
+        <h3>Support</h3>
+        <ul>
+
+            <li>
+              <a href="/about/sponsor/">Sponsor</a>
+            </li>
+
+            <li>
+              <a href="https://github.com/modernweb-dev/rocket/blob/main/CONTRIBUTING.md">Contribute</a>
+            </li>
+
+        </ul>
+      </nav>
+
+  </div>
+</div>
+
+
+</footer>
+
+
+
+
+
+<script type="module">
+  import '@rocket/navigation/rocket-navigation.js';
+  import '@rocket/drawer/rocket-drawer.js';
+  const drawer = document.querySelector('#sidebar');
+
+  // Toggle button
+  const triggers = document.querySelectorAll('[data-action="trigger-mobile-menu"]');
+  for (const trigger of [...triggers]) {
+    trigger.addEventListener('click', function () {
+      drawer.opened = true;
+    });
+  }
+</script>
+
+
+  <script>
+  async function serviceWorkerUpdate() {
+  if ('serviceWorker' in navigator) {
+    const oldReg = await navigator.serviceWorker.getRegistration();
+    let oldSwState;
+    if (oldReg && oldReg.active) {
+      oldSwState = oldReg.active.state;
+    }
+
+    let refreshing;
+
+    navigator.serviceWorker.addEventListener('controllerchange', async () => {
+      if (refreshing) {
+        return;
+      }
+
+      const newReg = await navigator.serviceWorker.getRegistration();
+      let newSwState;
+      if (newReg && newReg.active) {
+        newSwState = newReg.active.state;
+      }
+
+      if (oldSwState === 'activated' && newSwState === 'activating') {
+        refreshing = true;
+        window.location.reload();
+      }
+    });
+  }
+}
+
+serviceWorkerUpdate();
+
+</script>
+
+
+
+
+
+
+  </body>
+</html>

packages/generate-import-map/test-node/fixtures/test-case/scripts/main.js

@@ -0,0 +1,4 @@
+import { html, render } from 'lit-html';
+import '../components/test-component.js';
+
+render(html`<test-element></test-element>`, document.body);

packages/generate-import-map/test-node/inspectFolder.test.js

@@ -0,0 +1,24 @@
+import chai from 'chai';
+import { execute } from './test-helpers.js';
+
+const { expect } = chai;
+
+describe('inspectFolder', () => {
+  it.skip('can handle script src', async () => {
+    const { localSpecifiers, bareSpecifiers } = await execute('fixtures/script-src');
+    expect(localSpecifiers).lengthOf(1);
+    expect(bareSpecifiers).lengthOf(0);
+  });
+
+  it.skip('can handle script content', async () => {
+    const { localSpecifiers, bareSpecifiers } = await execute('fixtures/script-content');
+    expect(localSpecifiers).lengthOf(1);
+    expect(bareSpecifiers).lengthOf(0);
+  });
+
+  it('can handle multiple levels', async () => {
+    const { localSpecifiers, bareSpecifiers } = await execute('fixtures/test-case');
+    expect(localSpecifiers).lengthOf(3);
+    expect(bareSpecifiers).lengthOf(2);
+  });
+});

packages/generate-import-map/test-node/test-helpers.js

@@ -0,0 +1,11 @@
+import path from 'path';
+import { fileURLToPath } from 'url';
+
+import { inspectFolder } from 'generate-import-map';
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+
+export async function execute(inPath) {
+  const testDir = path.join(__dirname, inPath.split('/').join(path.sep));
+  return await inspectFolder(testDir);
+}

packages/generate-import-map/tsconfig.json

@@ -0,0 +1,24 @@
+// Don't edit this file directly. It is generated by /scripts/update-package-configs.ts
+
+{
+  "extends": "../../tsconfig.node-base.json",
+  "compilerOptions": {
+    "module": "ESNext",
+    "outDir": "./dist-types",
+    "rootDir": ".",
+    "composite": true,
+    "allowJs": true,
+    "checkJs": true,
+    "emitDeclarationOnly": true
+  },
+  "references": [],
+  "include": [
+    "src",
+    "*.js",
+    "types"
+  ],
+  "exclude": [
+    "dist",
+    "dist-types"
+  ]
+}

packages/generate-import-map/types/main.d.ts

@@ -0,0 +1,10 @@
+export interface Script {
+  specifier: string;
+  content: string;
+  filePath: string;
+}
+
+export interface Import {
+	s: number;
+	e: number;
+}

packages/remoteImports/index.js

@@ -0,0 +1 @@
+export { remoteImports } from './preset/remoteImports.js';

packages/remoteImports/package.json

@@ -0,0 +1,36 @@
+{
+  "name": "@rocket/remote-imports",
+  "version": "0.0.1",
+  "publishConfig": {
+    "access": "public"
+  },
+  "description": "Rocket preset to apply import map",
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/modernweb-dev/rocket.git",
+    "directory": "packages/remote-imports"
+  },
+  "author": "Modern Web <hello@modern-web.dev> (https://modern-web.dev/)",
+  "homepage": "https://rocket.modern-web.dev/docs/tools/remote-imports/",
+  "type": "module",
+  "exports": {
+    ".": "./index.js"
+  },
+  "scripts": {
+    "test": "mocha --timeout 5000 test-node/**/*.test.{js,cjs} test-node/*.test.{js,cjs}",
+    "test:watch": "onchange 'src/**/*.{js,cjs}' 'test-node/**/*.{js,cjs}' -- npm test",
+    "types:copy": "copyfiles \"./types/**/*.d.ts\" dist-types/"
+  },
+  "files": [
+    "*.js",
+    "dist",
+    "dist-types",
+    "src"
+  ],
+  "dependencies": {
+    "plugins-manager": "^0.2.0",
+    "rollup-plugin-import-map": "^2.2.2"
+  },
+  "types": "dist-types/index.d.ts"
+}

packages/remoteImports/preset/remoteImports.js

@@ -0,0 +1,20 @@
+import path from 'path';
+import { fileURLToPath } from 'url';
+import { addPlugin } from 'plugins-manager';
+import { rollupImportMapPlugin } from 'rollup-plugin-import-map';
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+
+export function remoteImports(importMap) {
+  return {
+    path: path.resolve(__dirname),
+    setupDevAndBuildPlugins: [
+      addPlugin({
+        name: 'rollup-plugin-import-map',
+        plugin: rollupImportMapPlugin,
+        location: 'top',
+        options: path.resolve(importMap),
+      }),
+    ],
+  };
+}

rocket.config.js

@@ -2,9 +2,10 @@ import { rocketLaunch } from '@rocket/launch';
 import { rocketBlog } from '@rocket/blog';
 import { rocketSearch } from '@rocket/search';
 import { absoluteBaseUrlNetlify } from '@rocket/core/helpers';
+import { remoteImports } from '@rocket/remote-imports';
 
 export default {
-  presets: [rocketLaunch(), rocketBlog(), rocketSearch()],
+  presets: [rocketLaunch(), rocketBlog(), rocketSearch(), remoteImports('./import-map.json')],
   absoluteBaseUrl: absoluteBaseUrlNetlify('http://localhost:8080'),
 
   // emptyOutputDir: false,

yarn.lock

@@ -1474,6 +1474,11 @@
     "@types/keygrip" "*"
     "@types/node" "*"
 
+"@types/es-module-lexer@^0.3.0":
+  version "0.3.0"
+  resolved "https://registry.yarnpkg.com/@types/es-module-lexer/-/es-module-lexer-0.3.0.tgz#9fee3f19f64e6b3f999eeb3a70bd177a4d57a6cb"
+  integrity sha512-XI3MGSejUQIJ3wzY0i5IHy5J3eb36M/ytgG8jIOssP08ovtRPcjpjXQqrx51AHBNBOisTS/NQNWJitI17+EwzQ==
+
 "@types/estree@*":
   version "0.0.45"
   resolved "https://registry.yarnpkg.com/@types/estree/-/estree-0.0.45.tgz#e9387572998e5ecdac221950dab3e8c3b16af884"
@@ -1603,6 +1608,14 @@
   resolved "https://registry.yarnpkg.com/@types/mocha/-/mocha-8.2.0.tgz#3eb56d13a1de1d347ecb1957c6860c911704bc44"
   integrity sha512-/Sge3BymXo4lKc31C8OINJgXLaw+7vL1/L1pGiBNpGrBiT8FQiaFpSYV0uhTaG4y78vcMBTMFsWaHDvuD+xGzQ==
 
+"@types/node-fetch@^2.5.8":
+  version "2.5.8"
+  resolved "https://registry.yarnpkg.com/@types/node-fetch/-/node-fetch-2.5.8.tgz#e199c835d234c7eb0846f6618012e558544ee2fb"
+  integrity sha512-fbjI6ja0N5ZA8TV53RUqzsKNkl9fv8Oj3T7zxW7FGv1GSH7gwJaNF8dzCjrqKaxKeUpTz4yT1DaJFq/omNpGfw==
+  dependencies:
+    "@types/node" "*"
+    form-data "^3.0.0"
+
 "@types/node@*":
   version "14.14.16"
   resolved "https://registry.yarnpkg.com/@types/node/-/node-14.14.16.tgz#3cc351f8d48101deadfed4c9e4f116048d437b4b"
@@ -2294,6 +2307,11 @@ async@^2.6.2:
   dependencies:
     lodash "^4.17.14"
 
+asynckit@^0.4.0:
+  version "0.4.0"
+  resolved "https://registry.yarnpkg.com/asynckit/-/asynckit-0.4.0.tgz#c79ed97f7f34cb8f2ba1bc9790bcc366474b4b79"
+  integrity sha1-x57Zf380y48robyXkLzDZkdLS3k=
+
 at-least-node@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/at-least-node/-/at-least-node-1.0.0.tgz#602cd4b46e844ad4effc92a8011a3c46e0238dc2"
@@ -2946,6 +2964,13 @@ colorette@^1.2.1:
   resolved "https://registry.yarnpkg.com/colorette/-/colorette-1.2.1.tgz#4d0b921325c14faf92633086a536db6e89564b1b"
   integrity sha512-puCDz0CzydiSYOrnXpz/PKd69zRrribezjtE9yd4zvytoRc8+RY/KJPvtPFKZS3E3wP6neGyMe0vOTlHO5L3Pw==
 
+combined-stream@^1.0.8:
+  version "1.0.8"
+  resolved "https://registry.yarnpkg.com/combined-stream/-/combined-stream-1.0.8.tgz#c3d45a8b34fd730631a110a8a2520682b31d5a7f"
+  integrity sha512-FQN4MRfuJeHf7cBbBMJFXhKSDq+2kAArBlmRBvcvFE5BB1HZKXtSFASDhdlz9zOYwxh8lDdnvmMOe/+5cdoEdg==
+  dependencies:
+    delayed-stream "~1.0.0"
+
 comma-separated-tokens@^1.0.0:
   version "1.0.8"
   resolved "https://registry.yarnpkg.com/comma-separated-tokens/-/comma-separated-tokens-1.0.8.tgz#632b80b6117867a158f1080ad498b2fbe7e3f5ea"
@@ -3386,6 +3411,11 @@ del@^2.2.0:
     pinkie-promise "^2.0.0"
     rimraf "^2.2.8"
 
+delayed-stream@~1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/delayed-stream/-/delayed-stream-1.0.0.tgz#df3ae199acadfb7d440aaae0b29e2272b24ec619"
+  integrity sha1-3zrhmayt+31ECqrgsp4icrJOxhk=
+
 delegate@^3.1.2:
   version "3.2.0"
   resolved "https://registry.yarnpkg.com/delegate/-/delegate-3.2.0.tgz#b66b71c3158522e8ab5744f720d8ca0c2af59166"
@@ -4092,6 +4122,15 @@ follow-redirects@^1.0.0:
   resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.13.1.tgz#5f69b813376cee4fd0474a3aba835df04ab763b7"
   integrity sha512-SSG5xmZh1mkPGyKzjZP8zLjltIfpW32Y5QpdNJyjcfGxK3qo3NDDkZOZSFiGn1A6SclQxY9GzEwAHQ3dmYRWpg==
 
+form-data@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/form-data/-/form-data-3.0.0.tgz#31b7e39c85f1355b7139ee0c647cf0de7f83c682"
+  integrity sha512-CKMFDglpbMi6PyN+brwB9Q/GOw0eAnsrEZDgcsH5Krhz5Od/haKHAX0NmQfha2zPPz0JpWzA7GJHGSnvCRLWsg==
+  dependencies:
+    asynckit "^0.4.0"
+    combined-stream "^1.0.8"
+    mime-types "^2.1.12"
+
 fresh@0.5.2, fresh@^0.5.2, fresh@~0.5.2:
   version "0.5.2"
   resolved "https://registry.yarnpkg.com/fresh/-/fresh-0.5.2.tgz#3d8cadd90d976569fa835ab1f8e4b23a105605a7"
@@ -5808,6 +5847,18 @@ mime-db@1.44.0:
   resolved "https://registry.yarnpkg.com/mime-db/-/mime-db-1.44.0.tgz#fa11c5eb0aca1334b4233cb4d52f10c5a6272f92"
   integrity sha512-/NOTfLrsPBVeH7YtFPgsVWveuL+4SjjYxaQ1xtM1KMFj7HdxlBlxeyNLzhyJVx7r4rZGJAZ/6lkKCitSc/Nmpg==
 
+mime-db@1.45.0:
+  version "1.45.0"
+  resolved "https://registry.yarnpkg.com/mime-db/-/mime-db-1.45.0.tgz#cceeda21ccd7c3a745eba2decd55d4b73e7879ea"
+  integrity sha512-CkqLUxUk15hofLoLyljJSrukZi8mAtgd+yE5uO4tqRZsdsAJKv0O+rFMhVDRJgozy+yG6md5KwuXhD4ocIoP+w==
+
+mime-types@^2.1.12:
+  version "2.1.28"
+  resolved "https://registry.yarnpkg.com/mime-types/-/mime-types-2.1.28.tgz#1160c4757eab2c5363888e005273ecf79d2a0ecd"
+  integrity sha512-0TO2yJ5YHYr7M2zzT7gDU1tbwHxEUWBCLt0lscSNpcdAfFyJOVEpRYNS7EXVcTLNj/25QO8gulHC5JtTzSE2UQ==
+  dependencies:
+    mime-db "1.45.0"
+
 mime-types@^2.1.18, mime-types@^2.1.27, mime-types@~2.1.17, mime-types@~2.1.24:
   version "2.1.27"
   resolved "https://registry.yarnpkg.com/mime-types/-/mime-types-2.1.27.tgz#47949f98e279ea53119f5722e0f34e529bec009f"
@@ -7401,6 +7452,11 @@ rimraf@^3.0.2:
   dependencies:
     glob "^7.1.3"
 
+rollup-plugin-import-map@^2.2.2:
+  version "2.2.2"
+  resolved "https://registry.yarnpkg.com/rollup-plugin-import-map/-/rollup-plugin-import-map-2.2.2.tgz#51100713ba379bf6bd077d090af9708f0201e9e7"
+  integrity sha512-y97Myu5kvuIoLrfSxRd90ytjv4wbOFCoWdi1pKVRfE8eOAcJqUOyPCLM4y3gw2u276dB/pLSFi48cl29SatXPw==
+
 rollup-plugin-terser@^7.0.0, rollup-plugin-terser@^7.0.2:
   version "7.0.2"
   resolved "https://registry.yarnpkg.com/rollup-plugin-terser/-/rollup-plugin-terser-7.0.2.tgz#e8fbba4869981b2dc35ae7e8a502d5c6c04d324d"