How can I replace all occurrences of a dollar ($) with an underscore (_) in javascript?

Question

As the title states, I need to relace all occurrences of the $ sign in a string variable with an underscore.

I have tried:

str.replace(new RegExp('$', 'g'), '_'); 

But this doesn't work for me and nothing gets replaced.

Answer 1

The $ in RegExp is a special character, so you need to escape it with backslash.

new_str = str.replace(new RegExp('\\$', 'g'), '_'); 

however, in JS you can use the simpler syntax

new_str = str.replace(/\$/g, '_');