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<!DOCTYPE HTML>
<html class="reftest-wait">
<head>
<style>
body {
margin: 0;
display: flex;
width: 400px;
}
canvas {
flex: 1;
opacity: 0.999;
border: 1px solid black;
}
.censor {
position: absolute;
width: 1px;
height: 1px;
background: cyan;
}
</style>
</head>
<body>
<canvas id="c" width="100" height="100"></canvas>
<script>
var ctx = document.getElementById("c").getContext('2d');
ctx.fillStyle = "lime";
ctx.fillRect(0, 0, 100, 100);
function doTest() {
document.body.style.width = "502px";
document.documentElement.removeAttribute("class");
}
window.addEventListener("MozReftestInvalidate", doTest);
</script>
<div class="censor" style="left:0; top:0;"></div>
<div class="censor" style="left:501px; top:0;"></div>
<div class="censor" style="left:0; top:101px;"></div>
<div class="censor" style="left:501px; top:101px;"></div>
</body>
</html>