This is the demo about Four HTML5 Attributes

HTML5 'autofocus' attribute

The below button got focus when the page was loaded

HTML5 'hidden' attribute

I am not hidden. But there is someone hidding below me!

I am not hidden. But there is someone hidding above me!

HTML5 'download' attribute

Click on the below link. The file will download as "download.txt", but its original name on the server is 1234567.txt Download link

HTML5 'placeholder' attribute

Checkout the source here...