Javascript Regexp Test Fails

I have problem with this regex: (\[|\])[0-9]+,([0-9]+(\[|\])|inf\])\s?.* Debuggex Demo When I try to do code: var rangeRegex = new RegExp('(\[|\])[0-9]+,([0-9]+(\[|\])|inf\])\s?.

Solution 1:

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?.*/;