https://github.com/pygy/compose-regexp.js https://github.com/pygy/compose-regexp.js ^^^ Regexp combinators in JS. 614 bytes minimized and gzipped. Once you're

https://github.com/pygy/compose-regexp.js https://github.com/pygy/compose-regexp.js ^^^ Regexp combinators in JS. 614 bytes minimized and gzipped. Once you're proficient with the standard RegExp syntax, you can write pretty complex ones without external tools, but when the times comes to debug and modify them, using combinators makes the task much much more simple.