Question

var prefix = 'pre-',
    number = 1,
    combined = prefix + number,
    prefixRemoved = combined.replace('/' + prefix + '/g', '');
console.debug(prefixRemoved);

How do I remove prefix from combined? I’m still getting pre-1 as a result.

Answer 1

You can just pass a string to replace() like this:

prefixRemoved = combined.replace(prefix, '');

or if you need parameters on the regular expression, you can create a regexp from a string like this:

prefixRemoved = combined.replace(new RegExp(prefix, "g"), '');

or, you can create the regex object first:

var re = new RegExp(prefix, "g");
prefixRemoved = combined.replace(re, '');