css/css-overflow/reference/overflow-inline-block-with-opacity-ref.html - external/w3c/web-platform-tests - Git at Google

 <!DOCTYPE html>
 <style>
   span { opacity: 0.99; }
   #button { display: inline-block; }
 </style>
 <span>
   <div id="button">hello<br>world</div>
 </span>
	<!DOCTYPE html>
	<style>
	span { opacity: 0.99; }
	#button { display: inline-block; }
	</style>
	<span>
	<div id="button">hello<br>world</div>
	</span>