font-size-keyword-system-font.html

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This WPT test may be referenced by the following Test IDs:
- /css/css-viewport/zoom/font-size-keyword-system-font.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>CSS zoom applies to font-size when specified via system font keyword</title>

<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">

<link rel="author" title="Mozilla" href="https://mozilla.org">

<link rel="help" href="https://drafts.csswg.org/css-viewport/">

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

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

<style>

#ref, #target {

  font: menu;

  width: 1em;

  height: 1em;

#target {

  zoom: 2;

</style>

<div id="ref">Reference</div>

<div id="target">Target</div>

<script>

test(function() {

  const unzoomedComputedSize = parseFloat(getComputedStyle(ref).fontSize);

  assert_greater_than(unzoomedComputedSize, 0, "system font should have a positive font-size");

  const zoomedComputedSize = parseFloat(getComputedStyle(target).fontSize);

  assert_equals(zoomedComputedSize, unzoomedComputedSize, "computed style should be the same");

  const unzoomedWidth = ref.getBoundingClientRect().width;

  const zoomedWidth = target.getBoundingClientRect().width;

  assert_approx_equals(zoomedWidth, 2 * unzoomedWidth, 0.01);

}, "zoom scales font-size set via system font keyword");

</script>