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

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