chromium/src/third_party/blink/web_tests/paint/overflow/background-mask-should-be-recorded-full-expected.html - manifest_repos/chromium_src - Git at Google

 <!DOCTYPE html>
 <style>
 body {
     margin: 0;
 }

 #big-black-box {
     position: absolute;
     background-color: black;
     -webkit-background-clip: text;
     width: 100%;
     bottom: 0;
 }

 #mask {
     color: transparent;
 }
 </style>
 <div id="big-black-box">
     <span id="mask">Background mask</span>
 </div>
	<!DOCTYPE html>
	<style>
	body {
	margin: 0;
	}

	#big-black-box {
	position: absolute;
	background-color: black;
	-webkit-background-clip: text;
	width: 100%;
	bottom: 0;
	}

	#mask {
	color: transparent;
	}
	</style>
	<div id="big-black-box">
	<span id="mask">Background mask</span>
	</div>