Disable zero as first letter in <input>

Question

Below code disables 0 as the first character in #foo.
However, you can bypass this by typing 123, then drag to select 123

Answer 1

I think you're looking for the keydown jQuery event as opposed to the keypress event. Here's some move info on the difference between the two. Try regex to get rid of leading zeroes:

$('input#foo').keydown(function(e){ 
    this.value = this.value.replace(/^0+/, '');
});