IE 10 and newer hides the placeholder upon focus and not after the first keystroke like other browsers. This is how the demo looks like in IE 10 on Windows 8 upon clicking on first input field:

To maintain the usability benefit provided by this concept it would make sense to specifically detect IE 10+ and show the label immediately on focus in those browsers.
IE 10 and newer hides the placeholder upon focus and not after the first keystroke like other browsers. This is how the demo looks like in IE 10 on Windows 8 upon clicking on first input field:
To maintain the usability benefit provided by this concept it would make sense to specifically detect IE 10+ and show the label immediately on focus in those browsers.