third_party/WebKit/LayoutTests/external/csswg-test/css-rhythm-1/line-height-step-dynamic-001.html - Issue 2707203005: Import csswg-test@ed79f8614481e97d61f17f41b65448c211d27c6f

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Issue 2707203005: Import csswg-test@ed79f8614481e97d61f17f41b65448c211d27c6f (Closed)

Patch Set: Created 3 years, 9 months ago

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	1 <!DOCTYPE html>

	2 <title>CSS Rhythmic Sizing: line-height-step dynamic change</title>

	3 <link rel="author" title="Koji Ishii" href="mailto:kojiishi@gmail.com">

	4 <link rel="help" href="https://drafts.csswg.org/css-rhythm-1/#line-height-step">

	5 <meta name="assert" content="This test asserts changing the line-height-step pro perty takes effects.">

	6 <meta name="flags" content="dom">

	7 <script src="/resources/testharness.js"></script>

	8 <script src="/resources/testharnessreport.js"></script>

	9 <style>

	10 div {

	11 font-size: 20px;

	12 line-height: 1;

	13 }

	14 </style>

	15 <div id="log"></div>

	16 <div id="target">X</div>

	17 <div id="next">X</div>

	18 <script>

	19 runTests();

	20 function runTests() {

	21 var before = next.offsetTop;

	22 target.style.lineHeightStep = "40px";

	23 var after = next.offsetTop;

	24 forceRelayout(document.documentElement);

	25 var afterRelayout = next.offsetTop;

	26

	27 test(function () {

	28 assert_not_equals(after, before);

	29 }, "Height must change when line-height-step changes");

	30 test(function () {

	31 assert_equals(after, afterRelayout);

	32 }, "Height must not change after relayout");

	33 }

	34

	35 function forceRelayout(element) {

	36 var saved = element.style.display;

	37 element.style.display = "none";

	38 element.offsetTop;

	39 element.style.display = saved;

	40 element.offsetTop;

	41 }

	42 </script>

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