Source code
Revision control
Copy as Markdown
Other Tools
<!DOCTYPE html>
<html>
<head>
<title>Remove Ancestor Clip to Animated Clip-Path</title>
<link rel="author" title="Claire Chambers" href="mailto:clchambers@microsoft.com">
<style>
@keyframes clip-path-huge {
0% {
clip-path: inset(-100%);
}
99% {
clip-path: inset(-100%);
}
/* Last 1% slightly different so animation doesn't get optimized as a NOP */
100% {
clip-path: inset(-101%);
}
}
#container {
display: inline-block;
width: 100px;
height: 100px;
background-color: black;
/* ensure #container creates a stacking context */
will-change: transform;
/* for positioning the outset */
position: relative;
}
#clipped-element {
display: inline-block;
width: 100px;
height: 100px;
background-color: purple;
animation: clip-path-huge 1000s;
/* inherited clip must be expanded by 1px for the filter backdrop */
filter: blur(1px);
}
#clipped-element-outset {
left: -10px;
top: -10px;
position: absolute;
border: 10px solid green;
width: 100%;
height: 100%;
}
</style>
</head>
<body>
<p>
Test passes if there is a green outset around a purple square.
</p>
<div id="container">
<div id="clipped-element">
<div id="clipped-element-outset"></div>
</div>
</div>
</body>
</html>