oscillation-javascript-fontsize-change.html

<!DOCTYPE html>
<html style="font-size: 16px">
<head>
<meta name="viewport" content="width=800">
<style>
  body {
    width: 800px;
    margin: 0;
    overflow-y: hidden;
  }
  .largersize{font-size: 1.1em}
</style>
<script src="resources/autosizingTest.js"></script>
</head>
<body>
<div>
    This paragraph should be autosized to 40px<br/>
    because it contains line breaks.<br/>
    This test is intended to check<br/>
    that there are no oscillations due to javascript<br/>
    briefly increasing the font size of a<br/>
    small paragraph below.
</div>
<div id="sizechanging" style="position: absolute; bottom: 0;">
    This text changes size using javascript below.
</div>
<script>
    var element = document.getElementById("sizechanging");
    var forceLayout = element.offsetHeight;
    element.className = 'largersize';
    forceLayout = element.offsetHeight;
    element.className = '';
    forceLayout = element.offsetHeight;
</script>
</body>
</html>

chromium/third_party/blink/web_tests/fast/text-autosizing/oscillation-javascript-fontsize-change.html