Why can I not group browser-specific CSS-selectors for different browsers?

Question

I just tried to write the following rule to style the input placeholder for browsers that support it:

#main input::         


        

Answer 1

If you are willing to use JavaScript, check out the -prefix-free script. It allows you to leave off the vendor specific prefixes (e.g. -webkit- or -moz-) for CSS properties like these.