Regex Replace anything but numbers and lowercase

Question

I have an input which I am binding to keyup()

On each keyup, I want it to:

1. disallow any characters that are not a number, a letter, or a dash, and

Answer 1

The regex for a number, letter or dash is: [-0-9a-z] (to include a literal dash in your character class, specify it as the first character; thereafter it's considered a range operator).

Try:

$('.my-input').keyup(function() {this.value = this.value.toLowerCase().replace(/[^-0-9a-z]/g,''); });