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-rw-r--r--layout/reftests/css-transitions/reframe-and-transition-starts-at-the-same-time.html26
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diff --git a/layout/reftests/css-transitions/reframe-and-transition-starts-at-the-same-time.html b/layout/reftests/css-transitions/reframe-and-transition-starts-at-the-same-time.html
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+++ b/layout/reftests/css-transitions/reframe-and-transition-starts-at-the-same-time.html
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+<!DOCTYPE html>
+<html class="reftest-wait">
+<style>
+#target::before {
+ transition: background-color 100s steps(1, end);
+ content: 'initial';
+ background-color: rgb(255, 255, 255);
+ height: 100px;
+ width: 100px;
+ position: absolute;
+}
+#target.hover::before{
+ background-color: rgb(0, 0, 0);
+ content: '';
+}
+</style>
+<div id="target"></div>
+<script>
+window.addEventListener("load", () => {
+ target.className = 'hover';
+ target.addEventListener('transitionstart', () => {
+ document.documentElement.classList.remove('reftest-wait');
+ });
+});
+</script>
+</html>