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Check or performance.now existence

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Eric Bidelman
2016-06-01 08:43:07 -07:00
parent 0aa8dee6d4
commit 5283db1459
1 changed files with 2 additions and 1 deletions
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3
src/WebComponents/dom.js
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@@ -14,7 +14,8 @@
// polyfill performance.now
if (!window.performance) {
// Note: old Safari has performance, but not now().
if (!(window.performance && window.performance.now)) {
var start = Date.now();
// only at millisecond precision
window.performance = {now: function(){ return Date.now() - start; }};