slevithan
/ xregexp-lookbehind2.js
Created Apr 14, 2012
Simulating lookbehind in JavaScript (take 2)
View xregexp-lookbehind2.js
| // Simulating infinite-length leading lookbehind in JavaScript. Uses XRegExp. | |
| // Captures within lookbehind are not included in match results. Lazy | |
| // repetition in lookbehind may lead to unexpected results. | |
| (function (XRegExp) { | |
| function prepareLb(lb) { | |
| // Allow mode modifier before lookbehind | |
| var parts = /^((?:\(\?[\w$]+\))?)\(\?<([=!])([\s\S]*)\)$/.exec(lb); | |
| return { |