1018522-1.html - mozsearch

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<!DOCTYPE html>

<html class="reftest-wait">

<title>Test that opacity changes on layers make the Compositor repaint the right area</title>

<style>

#box {

  width: 100px;

  height: 100px;

  border: 10px solid black;

  opacity: 1;

  will-change: opacity;

#box.halfTransparent {

  opacity: 0.5;

</style>

<div id="box"></div>

<script>

window.addEventListener("MozReftestInvalidate", function (e) {

  document.getElementById("box").className = "halfTransparent";

  document.documentElement.removeAttribute("class");

});

</script>