Javascript string replace with regex

Question

Can someone tell me why this is not working, and the variable still holds the string with the ":" in it?

btn_id_postfix = "hehe:haha";
btn_id_postfix.replace(/\:/g,"");

Answer 1

btn_id_postfix=btn_id_postfix.replace(/\:/g,"");

replace returns value, but doesn't change string.

Answer 2

replace doesn't change the value of the string you're modifying. What you have to do is simply to assign it to the variable.

btn_id_postfix = "hehe:haha";
btn_id_postfix = btn_id_postfix.replace(/\:/g,"");

Answer 3

You're not assigning the result to a variable. Try this:

btn_id_postfix = "hehe:haha";
btn_id_postfix = btn_id_postfix.replace(/\:/g,"");