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<!DOCTYPE html>
<meta charset="UTF-8">
<title>CSS Values Test: computed value of calc() values using multiplication/division with mixed units</title>
<link rel="help" href="https://www.w3.org/TR/css-values-4/#calc-computed-value">
<meta name="flags" content="">
<meta content="This meta-test checks for the resolution and absolutization of computed values with mixed units to 'px' when multiplication/division is used." name="assert">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
html {
font-size: 30px;
}
body {
font-size: 16px;
line-height: 1.25; /* computed value: 20px */
width: 520px;
height: 500px;
margin: 20px;
}
div#target {
height: 100px;
width: 100px;
}
</style>
<div id="target"></div>
<script>
function startTesting() {
var targetElement = document.getElementById("target");
function verifyComputedStyle(property_name, specified_value, expected_value) {
test(function() {
targetElement.style.setProperty(property_name, "initial");
targetElement.style.setProperty(property_name, specified_value);
assert_equals(getComputedStyle(targetElement)[property_name], expected_value);
}, `testing ${property_name}: ${specified_value}`);
}
verifyComputedStyle("width", "calc(5px * 10lh / 1px)", "1000px");
/*
10lh = 200px
5px * 200px / 1px = 1000px^2 / 1px = 1000px
Total = 1000px
*/
verifyComputedStyle("width", "calc(20% * 0.5em / 1px)", "832px");
/*
20% of 520px = 104px
0.5em = 8px
104px * 8px / 1px = 832px^2 / 1px = 832px
Total = 832px
*/
verifyComputedStyle("width", "calc(4px * 4em / 1px)", "256px");
/*
4em = 64px
4px * 64px / 1px = 256px^2 / 1px = 256px
Total = 256px
*/
verifyComputedStyle("width", "calc(400px / 4lh * 1px)", "5px");
/*
4lh = 80px
400px / 80px * 1px = 5 * 1px = 5px
Total = 5px
*/
verifyComputedStyle("width", "calc(20% / 0.5em * 1px)", "13px");
/*
20% of 520px = 104px
0.5em = 8px
104px / 8px * 1px = 13 * 1px = 13px
Total = 13px
*/
}
startTesting();
</script>
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