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<!DOCTYPE html>
<html lang="en">
<meta charset="utf-8">
<title>Blend mode items shouldn't clip unclipped children to their own clip</title>
body {
margin: 0;
background: white; /* this shouldn't be necessary, bug ??????? */
.content {
box-sizing: border-box;
border: 10px solid yellow;
width: 100px;
height: 100px;
.clip {
box-sizing: border-box;
width: 300px;
height: 200px;
border: 10px solid black;
background-color: white;
overflow: hidden;
.absolutelyPositioned {
position: absolute;
top: 20px;
left: 250px;
.inner {
margin-left: auto;
border-color: magenta;
.blendedOverlay {
position: absolute;
top: 20px;
left: 290px;
width: 10px;
border-left: 0;
border-right: 0;
border-color: blue;
<div class="clip">
<div class="absolutelyPositioned content"></div>
<div class="inner content"></div>
<div class="blendedOverlay content"></div>