Remove some characters from a string in javascript

Question

The characters in my string need to match this expression:

^[a-zA-Z0-9_-:]+$,

I want to remove every character that does not match the expression above (also spaces).

How can I achieve this?

Answer 1

Replace is your friend here:

var str="asfafasf@##f2f32f";
str.replace(/[^a-zA-Z0-9_\-:]/g,"") //output: asfafasff2f32f