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<!doctype html>
<html>
<head>
<meta charset=utf-8>
<title>CSS Test: DOM modification re-parsing test</title>
<link rel="help" href="https://drafts.csswg.org/cssom/">
<link rel="help" href="http://www.w3.org/TR/cssom-1/#the-cssrule-interface">
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<style>div { min-width: 0px; }</style>
<style id="style-element"></style>
</head>
<body>
<div id="test-div"></div>
<script type="text/javascript">
var style = document.getElementById("style-element");
var div = document.getElementById("test-div");
function testProperty(prop) {
// Assigning an empty string to textContent or innerHTML should trigger a
// reparse only if the element is not empty.
style.sheet.insertRule("#test-div { min-width: 42px; }");
assert_equals(getComputedStyle(div).minWidth, "42px");
style[prop] = "";
assert_equals(getComputedStyle(div).minWidth, "42px");
style[prop] = " ";
assert_equals(getComputedStyle(div).minWidth, "0px");
style.sheet.insertRule("#test-div { min-width: 42px; }");
assert_equals(getComputedStyle(div).minWidth, "42px");
style[prop] = "";
assert_equals(getComputedStyle(div).minWidth, "0px");
style.sheet.insertRule("#test-div { min-width: 42px; }");
assert_equals(getComputedStyle(div).minWidth, "42px");
style.appendChild(document.createTextNode(""));
assert_equals(getComputedStyle(div).minWidth, "0px");
style.sheet.insertRule("#test-div { min-width: 42px; }");
assert_equals(getComputedStyle(div).minWidth, "42px");
style[prop] = "";
assert_equals(getComputedStyle(div).minWidth, "0px");
}
test(function() {
testProperty("textContent");
}, "style.textContent modification");
test(function() {
testProperty("innerHTML");
}, "style.innerHTML modification");
</script>
</body>
</html>
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