CODEWITHSUNDEEP
javascriptregex
michail_w
michail_w

Reputation: 4471

Javascript RegExp test fails

I have problem with this regex:

(\[|\])[0-9]+,([0-9]+(\[|\])|inf\])\s?.*

Regular expression visualization

Debuggex Demo

When I try to do code:

var rangeRegex = new RegExp("(\[|\])[0-9]+,([0-9]+(\[|\])|inf\])\s?.*");
console.log(rangeRegex.test("]1,inf] Test Expression"));

I always get false. Why?

Upvotes: 2

Views: 1035

Answers (1)

Jerry
Jerry

Reputation: 71538

When you use the RegExp construct, you need to double escape with your backslashes:

var rangeRegex = new RegExp("(\\[|\\])[0-9]+,([0-9]+(\\[|\\])|inf\\])\\s?.*");

Or use a literal one::

var rangeRegex = /(\[|\])[0-9]+,([0-9]+(\[|\])|inf\])\s?.*/;

Upvotes: 11

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