<!DOCTYPE html>
<html class="reftest-wait">
<style>
  canvas {
    width: 100px;
    height: 100px;
    background: green;
    outline: 50px solid orange;
    outline-offset: -50px;
    transform: translateZ(0);
  }
</style>
<canvas id="canvas"></canvas>
<script>
var canvas = document.getElementById('canvas');
var ctx = canvas.getContext('webgl');
ctx.clearColor(0.0, 0.5, 0.0, 1.0);
ctx.clear(ctx.COLOR_BUFFER_BIT);
requestAnimationFrame(ts => {
document.documentElement.classList.remove("reftest-wait");
});
</script>
</html>