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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /css/css-images/object-view-box-auto-size-relayout.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<html class="reftest-wait">
<title>Changing object-view-box on an auto-sized element triggers relayout</title>
<link rel="match" href="object-view-box-auto-size-relayout-ref.html">
<style>
canvas {
display: block;
width: 100px;
height: auto;
}
</style>
<body>
<canvas id="canvas" width="100" height="100"></canvas>
<script>
var ctx = document.getElementById("canvas").getContext("2d");
ctx.fillStyle = "red";
ctx.fillRect(0, 0, 100, 100);
function afterFrame(callback)
{
requestAnimationFrame(() => requestAnimationFrame(callback));
}
// Let the canvas lay out and paint at its natural 100x100 (1:1) size first,
// then crop away the bottom half. Since height is auto and there's no
// explicit aspect-ratio, the used height is derived from the cropped
// (2:1) intrinsic ratio, so this must trigger a relayout, not just a repaint.
window.onload = () => {
afterFrame(() => {
canvas.style.objectViewBox = "inset(0px 0px 50px 0px)";
afterFrame(() => {
document.documentElement.classList.remove("reftest-wait");
});
});
};
</script>
</body>
</html>