<!DOCTYPE HTML> <html><head> <meta charset="utf-8"> <title>Testcases for overflow-clip-box:content-box</title> <style type="text/css"> html,body { color:black; background-color:white; font:16px monospace; padding:0; margin:7px; } .block { border:1px solid grey; height:50px; width:200px; padding:20px; overflow:auto; overflow-clip-box:content-box; line-height:1px; } .rel { position:relative; } mask { display:block; position:absolute; left: -1px; bottom: -1px; height: 25px; width: 80%; background:black; } </style> </head> <body> <div style="position:relative;"> <div contenteditable=true spellcheck=false tabindex=0 id=x class="block"> XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX</div> <mask></mask> </div> <script> var x = document.getElementById('x'); x.focus(); window.getSelection().collapse(x,0); </script> </body> </html>