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+<!DOCTYPE html>
+<html class="reftest-wait">
+<title>
+Child element in animating element that display property is changed from none
+</title>
+<style>
+#test {
+ display: none;
+ width: 100px;
+ height: 100px;
+}
+#child {
+ background-color: green;
+ width: 50px;
+ height: 50px;
+}
+</style>
+<div id="test">
+ <div id="child"></div>
+</div>
+<script>
+ var anim = test.animate({ backgroundColor: [ 'blue', 'blue' ] },
+ { duration: 1000,
+ iterations: Infinity });
+
+ requestAnimationFrame(() => {
+ requestAnimationFrame(() => {
+ document.styleSheets[0].cssRules[0].style.setProperty('display', 'block');
+ document.documentElement.classList.remove('reftest-wait');
+ });
+ });
+</script>
+</html>