jquery keyup function check if number

Question

i am trying to create an input field where the user can only type in numbers. this function is already working almost fine for me:

        $(\'#p_first\').k         


        

Answer 1

With a key event, use event.key to get the actual value. To check if integer:

isFinite(event.key);

An easier HTML solution would be to use the number type input. It restricts to only numbers (kind of).

Either way, you should clean all user input with:

string.replace(/[^0-9]/g,'');