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Correctly clone dynami CSSStyleSheets (Fix #1370)

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This commit is contained in:
Niklas von Hertzen 2018-01-07 20:13:26 +08:00
parent 8788a9f458
commit 4c14894a0a
2 changed files with 46 additions and 0 deletions
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9
src/Clone.js
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@ -229,6 +229,15 @@ export class DocumentCloner {
return tempIframe; return tempIframe;
} }
if (node instanceof HTMLStyleElement && node.sheet && node.sheet.cssRules) {
const css = [].slice
.call(node.sheet.cssRules, 0)
.reduce((css, rule) => css + rule.cssText, '');
const style = node.cloneNode(false);
style.textContent = css;
return style;
}
return node.cloneNode(false); return node.cloneNode(false);
} }

37
tests/reftests/dynamicstyle.html Normal file
View File

@ -0,0 +1,37 @@
<!DOCTYPE html>
<html>
<head>
<title>Dynamic style</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<script type="text/javascript" src="../test.js"></script>
<style id="style">
@font-face {
font-family: 'Roboto';
font-style: normal;
font-weight: 400;
src: local('Roboto'), local('Roboto-Regular'), url(https://fonts.gstatic.com/s/roboto/v18/CWB0XYA8bzo0kSThX0UTuA.woff2) format('woff2');
unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2212, U+2215;
}
body { font-family: "Roboto", serif }
div {
padding: 20px;
}
.div1 {
background: darkgreen;
color: white;
}
</style>
<script>
document.querySelector('#style').sheet.insertRule(
'.div2 { background: darkgreen; color:white; }',
document.querySelector('#style').sheet.cssRules.length
);
</script>
</head>
<body>
<div class="div1">Static styles</div>
<div class="div2">Dynamic styles</div>
</body>
</html>