Blitz - WPT: line-height-204.html

wpt / css / CSS2 / visudet / line-height-204.html

<!DOCTYPE html>
<html class="reftest-wait">
<meta charset="utf-8">
<title>CSS2 Line height test: baseline position, normal sizing vs explicit sizing</title>
<link rel="author" title="Florian Rivoal" href="https://florian.rivoal.net">
<link rel="help" href="https://drafts.csswg.org/css2/visudet.html#line-height">
<link rel="match" href="reference/line-height-202-ref.html">
<meta name="assert" content="The position of the baseline in an inline-level box whose line-height is normal
                             and the position of the baseline in an inline-level box whose line-height is set to a non normal value resulting in the same height
                             are the same,
                             assuming only the first available font is used.">
<style>
@font-face {
  font-family: 'high';
  font-style: normal;
  font-weight: 400;
  src:  url(/fonts/Revalia.woff) format('woff');
}

div {
  position: absolute;
  font-size: 100px;
  width: 2em; /* plenty of room for the (invisible) text */
  text-align: right;
  color: transparent;
}
span { /* visible thing aligned to the baseline, and small enough to not influence its position */
  display: inline-block;
  width: 20px;
  height: 20px;
}

/* white #lh-auto is on top of red #lh-manual,
   and as their baselines should line up
   #lh-manual should be fully covered,
   and no red should be visible */
#lh-manual { font-family: high; }
#lh-manual span { background: red; }

#lh-auto { font-family: high; line-height: normal; }
#lh-auto span { background: white; }

</style>

<body onload="measure()">
<p>Test passes if there is <strong>no red</strong> below.

<div id=lh-manual>a<span></span></div>
<div id=lh-auto>a<span></span></div>

<script>
function measure() { /* let layout complete first, so that we can measure things */
  var lha = document.getElementById("lh-auto");
  var lhm = document.getElementById("lh-manual")
  var h = window.getComputedStyle(lha).height; /*getting the used-value of line-height by proxy */
  lhm.style.lineHeight = h;
  document.documentElement.className = "";
}
</script>

/css/CSS2/visudet/reference/line-height-202-ref.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Test Reference file</title>
<link rel="author" title="Florian Rivoal" href="https://florian.rivoal.net">

<p>Test passes if there is <strong>no red</strong> below.