File: width-equals-window-inner-width.html

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<!DOCTYPE html>
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>CSS Test: CSS media query width equals window innerWidth</title>

<link rel="author" title="Jinfeng Ma" href="mailto:majinfeng1@xiaomi.org">
<link rel="help" href="https://www.w3.org/TR/css3-mediaqueries/#width">
<link rel="help" href="https://drafts.csswg.org/cssom-view/#dom-window-innerwidth">

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

<!--
It'd be best to programmatically change device scale factor so that the document
width becomes non integral but for now this test is only effective when run on
devices with a fractional device scale factor.
-->
<script type="text/javascript">
    'use strict';
    test(() => {
      assert_true(window.matchMedia('(width: ' + window.innerWidth + 'px)').matches);
    }, 'CSS media query width equals window innerWidth.');
</script>