Use CSS to automatically add 'required field' asterisk to form inputs

Question

What is a good way to overcome the unfortunate fact that this code will not work as desired:

    Name:         


        
      

Answer 1

input[required]{
    background-image: radial-gradient(#F00 15%, transparent 16%), radial-gradient(#F00 15%, transparent 16%);
    background-size: 1em 1em;
    background-position: right top;
    background-repeat: no-repeat;
}