LayoutTests/fast/css-grid-layout/grid-item-z-index-stacking-context.html - WebKit - Git at Google

 <!DOCTYPE html>
 <html>
 <head>
 <link href="../css-intrinsic-dimensions/resources/width-keyword-classes.css" rel="stylesheet">
 <link href="resources/grid.css" rel="stylesheet">
 <style>
 .grid {
     grid-template-rows: 100px;
     grid-template-columns: 200px 200px;
     margin-top: 10px;
 }
 .red {
     background-color: red;
 }
 .green {
     background-color: green;
 }
 .positiveZIndex {
     z-index: 10;
 }
 .negativeZIndex {
     z-index: -5;
 }
 </style>
 </head>
 <body>
 <p>This test checks that grid items with 'z-index' do produce a stacking context and that we honor the property.</p>
 <p>For this test to pass, there should be no red below.</p>

 <div class="grid fit-content">
     <div class="sizedToGridArea green positiveZIndex firstRowFirstColumn"></div>
     <div class="sizedToGridArea red firstRowFirstColumn"></div>
 </div>

 <div class="grid fit-content">
     <div class="sizedToGridArea green firstRowFirstColumn"></div>
     <div class="sizedToGridArea red negativeZIndex firstRowFirstColumn"></div>
 </div>

 <div class="grid fit-content">
     <div class="sizedToGridArea green firstRowBothColumn"></div>
     <div class="sizedToGridArea red negativeZIndex firstRowFirstColumn"></div>
     <div class="sizedToGridArea red negativeZIndex firstRowSecondColumn"></div>
 </div>

 </body>
 </html>
	<!DOCTYPE html>
	<html>
	<head>
	<link href="../css-intrinsic-dimensions/resources/width-keyword-classes.css" rel="stylesheet">
	<link href="resources/grid.css" rel="stylesheet">
	<style>
	.grid {
	grid-template-rows: 100px;
	grid-template-columns: 200px 200px;
	margin-top: 10px;
	}
	.red {
	background-color: red;
	}
	.green {
	background-color: green;
	}
	.positiveZIndex {
	z-index: 10;
	}
	.negativeZIndex {
	z-index: -5;
	}
	</style>
	</head>
	<body>
	<p>This test checks that grid items with 'z-index' do produce a stacking context and that we honor the property.</p>
	<p>For this test to pass, there should be no red below.</p>

	<div class="grid fit-content">
	<div class="sizedToGridArea green positiveZIndex firstRowFirstColumn"></div>
	<div class="sizedToGridArea red firstRowFirstColumn"></div>
	</div>

	<div class="grid fit-content">
	<div class="sizedToGridArea green firstRowFirstColumn"></div>
	<div class="sizedToGridArea red negativeZIndex firstRowFirstColumn"></div>
	</div>

	<div class="grid fit-content">
	<div class="sizedToGridArea green firstRowBothColumn"></div>
	<div class="sizedToGridArea red negativeZIndex firstRowFirstColumn"></div>
	<div class="sizedToGridArea red negativeZIndex firstRowSecondColumn"></div>
	</div>

	</body>
	</html>