Regex to capture both '?' and '%3f' in a javascript replace() method

Question

I'm terrible with Regex, can't find a suitable answer on Stack which works for this.

I have a string like this:

 var str = 'abc?def%3f999%3F^%&$*'

I only want to remove the following:

?, %3f and %3F (the entity codes for question marks)

I've tried this:

 var theQuery = str.replace([\\?]|\\%3f|\\%3F,'');

But this doesn't appear to be valid regex. What's a solution that will work here?

Answer 1

You can use this:

var str = 'abc?def%3f999%3F^%&$*'
var theQuery = str.replace(/\?|%3f/gi, '');
//=> abcdef999^%&$*

• You need to use regex delimiters / and /
• You need to use global switch g
• No need to double escape
• No need to escape %