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-rw-r--r--layout/reftests/css-animations/marker-reframe-and-animation-starts-at-the-same-time.html33
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diff --git a/layout/reftests/css-animations/marker-reframe-and-animation-starts-at-the-same-time.html b/layout/reftests/css-animations/marker-reframe-and-animation-starts-at-the-same-time.html
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+++ b/layout/reftests/css-animations/marker-reframe-and-animation-starts-at-the-same-time.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+<style>
+@keyframes anim {
+ from { background-color: rgb(255, 255, 255); }
+ to { background-color: rgb(255, 255, 255); }
+}
+#target::marker {
+ content: 'initial';
+ background-color: rgb(0, 0, 0);
+ height: 100px;
+ width: 100px;
+ position: absolute;
+}
+#target.hover::marker{
+ content: '';
+ animation: anim 100s steps(1, start);
+}
+#target {
+ display: list-item;
+ list-style-position: inside;
+}
+</style>
+<div id="target"></div>
+<script>
+window.addEventListener("load", () => {
+ target.className = 'hover';
+ target.addEventListener('animationstart', () => {
+ document.documentElement.classList.remove('reftest-wait');
+ });
+});
+</script>
+</html>