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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /css/cssom/medialist-interfaces-001.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<html>
<head>
<title>CSS Test: CSSOM Media Query List Serialization</title>
<link rel="author" title="Ben Sheldon" href="mailto:ben@codeforamerica.org">
<link rel="author" title="Chapman Shoop" href="mailto:chapman.shoop@gmail.com">
<meta name="flags" content="dom">
<meta name="assert" content="MediaLists are serialized according to the specification">
<script src="/resources/testharness.js" type="text/javascript"></script>
<script src="/resources/testharnessreport.js" type="text/javascript"></script>
</head>
<body>
<noscript>Test not run - javascript required.</noscript>
<div id="log"></div>
<script type="text/javascript">
var styleElement;
var styleSheet;
var mediaList;
// Setup
function setup() {
styleElement = document.getElementById("styleElement");
if (styleElement) {
// teardown
document.getElementsByTagName("head")[0].removeChild(styleElement);
styleElement = undefined;
styleSheet = undefined;
mediaList = undefined;
}
styleElement = document.createElement("style");
styleElement.id = "styleElement";
styleElement.type = "text/css";
styleElement.media = "all";
document.getElementsByTagName("head")[0].appendChild(styleElement);
styleSheet = styleElement.sheet;
mediaList = styleSheet.media;
}
// MediaList.mediaText equals the 'media' value of the initial 'style' element.
test(function() {
setup();
assert_equals(mediaList.mediaText, "all");
}, "mediatest_medialist_serialize_element");
// To serialize a comma-separated list concatenate all items of the list in list order while separating them by \",\" (U+002C), followed by a space (U+0020).
test(function() {
setup();
mediaList.appendMedium('screen');
assert_equals(mediaList.mediaText, "all, screen");
}, "mediatest_medialist_serialize_comma");
// If the media query list is empty return the empty string.
test(function() {
setup();
mediaList.deleteMedium('all');
assert_equals(mediaList.mediaText, "");
}, "mediatest_medialist_serialize_empty");
// Each media query should be sorted in the same order as they appear in the list of media queries.
test(function() {
setup();
mediaList.appendMedium('screen');
mediaList.appendMedium('print');
assert_equals(mediaList.mediaText, "all, screen, print");
}, "mediatest_medialist_serialize_order");
</script>
</body>
</html>