61 lines
2.7 KiB
HTML
61 lines
2.7 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<title>CSSOM - Extensions to the Document Interface: StyleSheetList length reflects dynamically loaded and unloaded sheets</title>
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<link rel="author" title="Jesse Bounds" href="mailto:jesse@codeforamerica.org">
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<link rel="help" href="http://www.w3.org/TR/cssom-1/#extensions-to-the-document-interface">
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<link rel="help" href="http://www.w3.org/TR/cssom-1/#the-stylesheetlist-interface">
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<link rel="help" href="http://www.w3.org/TR/cssom-1/#css-style-sheet-collections">
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<link rel="stylesheet" href="stylesheet.css" type="text/css">
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<meta name="flags" content="dom">
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<meta name="assert" content="The styleSheets length attribute must reflect the number of sheets at page load and after dynamically">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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</head>
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<body>
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<div id="log"></div>
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<script>
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// Get the Document's styleSheets attribute
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var styleSheets = document.styleSheets;
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// Verify that the styleSheets list length is 1 due to "stylesheet.css" loaded in head section
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test(function() {
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assert_equals(styleSheets.length, 1, "styleSheets.length is incorrect:");
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}, "stylesheet.css should be loaded and styleSheets.length === 1");
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// Verify that the styleSheets list length is 0 after removing the loaded sheet from the DOM
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test(function() {
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// get the one and only sheet loaded
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var sheet = styleSheets.item(0);
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// remove the sheet from the DOM
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sheet.ownerNode.parentNode.removeChild(sheet.ownerNode)
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// assert that there are 0 styleSheets in the styleSheets property
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assert_equals(styleSheets.length, 0, "styleSheets.length is incorrect:");
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}, "stylesheet.css should be unloaded and styleSheets.length === 0");
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// Verify that the styleSheets list length is back to 1 after loading a new sheet
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async_test(function(t) {
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// create a css file reference
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var fileReference = document.createElement("link");
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fileReference.setAttribute("rel", "stylesheet");
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fileReference.setAttribute("type", "text/css");
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fileReference.setAttribute("href", "stylesheet-1.css");
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fileReference.onerror = t.step_func_done(function() {
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// assert that there is 1 styleSheet in the styleSheets property
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assert_equals(styleSheets.length, 1, "styleSheets.length is incorrect:");
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});
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// load the css file reference into the head section
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var head = document.getElementsByTagName("HEAD")[0];
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head.appendChild(fileReference);
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}, "stylesheet-1.css should be loaded and styleSheets.length === 1");
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</script>
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</body>
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</html>
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