<!DOCTYPE html> <html> <head> <style type="text/css"> #tablecell { display: table-cell; } .border { border: 1px solid blue; } </style> </head> <body> <span class="border"> <span id="tablecell">x</span> </span> <script> document.body.offsetWidth; document.getElementById("tablecell").removeAttribute("id"); </script> </body> </html>
