How to append backslash if pattern matches in javascript or jQuery

Question

I have to check if a string contains some special character, and if it does, add a backslash to it.

var spChar=['%','^','!'];

If string is "This contains % and ^ characters".
I want to make it "This contains \% and \^ characters".

I dont want to loop through all the characters. Is there anyway i can achieve this by using regex

Community · Accepted Answer · 2017-05-23 12:12:47Z

5

You can use a regex like

"This contains % and ^ characters".replace(/([%^!])/g, '\\$1')

But if you are looking to escape regex, you can use a function like

if (!RegExp.escape) {
    RegExp.escape = function (s) {
        return s.replace(/[\-\[\]{}()*+?.,\\\^$|#\s]/g, "\\$&")
    };
}

//then
var newstring = RegExp.escape(mystring)

edited May 23, 2017 at 12:12

CommunityBot

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answered Sep 23, 2014 at 2:55

Arun P Johny

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1 Comment

danguilherme Over a year ago

Inside escape function, isn't it s.replace(...) instead of value.replace(...)?

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