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+<!DOCTYPE HTML>
+<html>
+<head>
+ <meta charset="utf-8">
+ <title>CSS Test: 'contain: layout' should not create a stacking context when no principle box is generated.</title>
+ <link rel="author" title="Yusuf Sermet" href="mailto:ysermet@mozilla.com">
+ <link rel="author" title="Morgan Rae Reschenberg" href="mailto:mreschenberg@berkeley.edu">
+ <link rel="help" href="https://drafts.csswg.org/css-contain/#containment-layout">
+ <link rel="match" href="contain-paint-ignored-cases-no-principal-box-001-ref.html">
+ <style>
+ div {
+ position: relative;
+ width: 100px;
+ }
+ #div1,
+ #div3 {
+ background-color: #cfc;
+ height: 100px;
+ }
+ #div1 {
+ z-index: 5;
+ }
+ #div2 {
+ display: contents;
+ contain: layout;
+ background-color: #fdd;
+ height: 100px;
+ top: -20px;
+ }
+ #div2_1 {
+ background-color: #ffc;
+ z-index: 6;
+ top: -10px;
+ height: 100px;
+ }
+ #div2_2 {
+ z-index: 3;
+ position: absolute;
+ top: -15px;
+ width: 40px;
+ height: 300px;
+ background-color: #ddf;
+ }
+ #div3 {
+ z-index: 2;
+ top: -50px;
+ }
+ </style>
+</head>
+<body>
+ <div id="div1"></div>
+
+ <div id="div2">
+ <div id="div2_1"></div>
+
+ <div id="div2_2"></div>
+ </div>
+
+ <div id="div3"></div>
+</body>
+</html>