How to Create Adaptive Placeholders with CSS

Danny King has designed an interactive placeholder thing for his forms and wrote it entirely in CSS. He has shared how he designed that placeholder and how it manages to adapt to user input.

Before he came up with the Adaptive Placeholder, it was just using a normal one. he liked the simplicity of using a placeholder as a label. It actually made a pretty crappy interaction for the user though. A user would type and the text disappeared. The person who enters a value first isn’t always the same person who sees it later. To solve this problem he tried making the placeholder persist through the typing.

Requirements: CSS
Demo: http://blog.circleci.com/adaptive-placeholders/
License: License Free