<!doctype html>
<title>Anonymous button content box</title>
<link rel=match href=anonymous-button-content-box-ref.html>
<style>
body { margin: 0 }
button, input { width: 124px; height: 124px; background: papayawhip; border: 2px solid; margin: 0; padding: 0; float: left; font: inherit }
body > div { clear: left; }
button > div { width: 50px; height: 50px; border: solid }
.grid { display: grid }
.flex { display: flex }
.tall { height: 150px }
.wide { width: 150px }
</style>
<div>
 <input type=button value=input>
 <input type=button value="input grid" class=grid>
 <input type=button value="input flex" class=flex>
 <button>button</button>
</div>
<div>
 <button style="text-align: left">button left</button>
 <button><div>div</div></button>
 <button class=grid>grid</button>
 <button class=grid><div>grid</div></button>
</div>
<div>
 <button class=flex>flex</button>
 <button class=flex><div>flex</div></button>
 <button><div class=tall>tall</div></button>
 <button><div class=wide>wide</div></button>
</div>
