Replace in a string by zeros in JavaScript

Question

I have this regular expression:

/@import\s*;/g

What I'm trying to do is to replace all the occurrences of @import "blablabla"; by zeros or whitespaces in a string.

I tried using the replace() method this way:

"@import 'file.css';".replace(/@import\s*;/g, "0");

But it doesn't work because it replaces each occurrence by one zero. For example, I wanna replace @import 'file.css'; by 0000000000000000000, and not by 0. Not that @import 'file.css'; can be @import 'file.css';. So, you can't know the length of the string.

Is there any fast way to do this?