CODEWITHSUNDEEP
javascriptregex
ethanjyx
ethanjyx

Reputation: 2067

How to generate a string containing forward slash with regular expression in javascript?

I'm using the following Javascript to generate a String: /abc/.source. By running this code in console, it will return "abc".

Now I want to generate a string like "abc/".

I tried /abc\//.source but it returns "abc\/".

How can I achieve this WITHOUT using var reg = new RegExp("abc/");reg.source?

Upvotes: 1

Views: 305

Answers (1)

RobG
RobG

Reputation: 147403

I think you misunderstand the source property:

Let S be a String in the form of a Pattern equivalent to P, in which certain characters are escaped as described below. S may or may not be identical to P or pattern; however, the internal procedure that would result from evaluating S as a Pattern must behave identically to the internal procedure given by the constructed object's [[Match]] internal property.

15.10.4.1 new RegExp(pattern, flags)

In other words, the source value must be able to be used as the string in a regular expression constructor:

var re = new RegExp( s.source );

Where the resulting expression must behave the same as the original when used in match.

So given that to match 'abc/' the required pattern is abc\/ then /abc\//.source must be abc\/.

And BTW:

(new RegExp('abc/')).source == 'abc\/';

Upvotes: 3

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