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https://stackoverflow.com/questions/3569104/positive-look-behind-in-javascript-regular-expression
Lookbehind assertions were recently finalised for JavaScript and will be in the next publication of the ECMA-262 specification. They are supported in Chrome 66 (Opera 53), but no other major browsers at the time of writing.
https://www.hackerrank.com/challenges/positive-lookbehind
The positive lookbehind (?<=) asserts regex_1 to be immediately preceded by regex_2. Lookbehind is excluded from the match (do not consume matches of regex_2), but only assert whether a match is possible …
https://cmsdk.com/javascript/javascript-negative-lookbehind-equivalent.html
I need to match a string that does not start with a specific set of characters. It seems I am unable to find a regex that does this without failing if the matched part is found at the beginning of the string. Negative lookbehinds seem to be the only answer, but javascript doesn't have one.
https://www.stefanjudis.com/today-i-learned/the-complicated-syntax-of-lookaheads-in-javascript-regular-expressions/
Mar 18, 2018 · If you're interested in more cutting edge features have a look at Mathias' and Benedikt's slides on new features coming to JavaScript there is way more exciting stuff to come. Another side note: If you're developing the browser make sure to check the support of lookbehinds first. At the time of writing they're not supported in Firefox.
https://gist.github.com/slevithan/2387872
Apr 14, 2012 · This is an alternate version of my previous lookbehind simulation that accepted leading lookbehind and the main regex as one combined pattern. This version does not require the XRegExp.matchRecursive addon. This code is released under the MIT License.
https://javascript.info/regexp-lookahead-lookbehind
Sometimes we need to find only those matches for a pattern that are followed or preceeded by another pattern. There’s a special syntax for that, called “lookahead” and “lookbehind”, together referred to …
http://blog.stevenlevithan.com/archives/mimic-lookbehind-javascript
Unlike lookaheads, JavaScript doesn't support regex lookbehind syntax. That's unfortunate, but I'm not content with just resigning to that fact. Following are three ways I've come up with to mimic lookbehinds in JavaScript. For those not familar with the concept of lookbehinds,...
https://www.excelforum.com/excel-programming-vba-macros/1115495-regular-expression-lookbehind.html
Nov 30, 2015 · VBA does not support look behind be it positive or negative-only look ahead . The same goes for JavaScript.
https://scratch.mit.edu/discuss/post/288559/
It's supposed to replace all newlines not preceded by > with <br>, but it looks like javascript's regexp engine doesn't support lookbehinds. Does anyone know an alternative I could use? Last edited by djdolphin (April 1, 2014 01:06:29)
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