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<!DOCTYPE html>
<html class="reftest-wait">
<title>
Opacity animation winning over opacity transition creates a stacking context
for correct style.
</title>
<style>
span {
height: 100px;
width: 100px;
position: fixed;
background: green;
top: 50px;
}
@keyframes Opacity1 {
from, to { opacity: 1; }
}
#test {
width: 100px; height: 100px;
background: blue;
opacity: 1;
transition: opacity 100s steps(1, start);
animation: Opacity1 100s;
}
</style>
<span></span>
<div id="test"></div>
<script>
window.addEventListener("load", () => {
var target = document.getElementById("test");
getComputedStyle(target).opacity;
// CSS animation wins over transitions, so transition won't be visible during
// the CSS animation.
target.style.opacity = 0;
getComputedStyle(target).opacity;
document.documentElement.classList.remove("reftest-wait");
});
</script>
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