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<!DOCTYPE html>
<html class="reftest-wait reftest-no-flush">
<meta name="viewport" content="width=device-width,initial-scale=1">
<style>
@keyframes first {
0% { opacity: 0; }
100% { opacity: 0; }
}
@keyframes second {
0% { opacity: 0.5; }
100% { opacity: 0.5; }
}
#target {
width: 100px;
height: 100px;
opacity: 1;
background-color: green;
}
</style>
<div id="target"></div>
<script>
document.addEventListener("MozReftestInvalidate", async () => {
target.style.animation = "first 100s";
await new Promise(resolve => {
target.addEventListener("animationstart", resolve);
});
// Wait two frames to make sure the animation is composited.
await new Promise(resolve => { requestAnimationFrame(resolve); });
await new Promise(resolve => { requestAnimationFrame(resolve); });
target.style.animation = "second 100s 100s";
// To take a snapshot in the delay phase, wait two frames instead of
// wait for the animationstart event.
await new Promise(resolve => { requestAnimationFrame(resolve); });
await new Promise(resolve => { requestAnimationFrame(resolve); });
document.documentElement.classList.remove("reftest-wait");
}, { once: true });
</script>
</html>
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