How can I regex match which finds only nested pattern

Question

I want to replace all the %(<>). String can be nested pattern as well.

para %(test) pattern %(te%(value)st) Hello Testing

I want it to be converted to

para MATCHFOUND pattern MATCHFOUND Hello Testing

Using the below regex

\%\((.*?)\)+

I get:

**para MATCHFOUND pattern MATCHFOUND*st)* Hello Testing**

Which is not correct as st) is not treated in pattern

Can anyone help me out with a proper regex to handle this.

For nested regex patterns see https://stackoverflow.com/questions/133601/can-regular-expressions-be-used-to-match-nested-patterns — Cody Ｇ, Jul 11 '18 at 14:12
Do you need balanced parenthesis? Also, is '2' the max amount of nesting? Or there's no limit? — Julio, Jul 11 '18 at 18:17

cornacchia · Answer 1 · 2018-07-11T15:17:27.227

1

This one works for me: /\%\([\w\%\(\)]*\)/g

var string = "para %(test) pattern %(te%(value)st) Hello Testing"
var regex = /%\([\w%()]*\)/g
console.log(string.replace(regex, "MATCHFOUND"));
// "para MATCHFOUND pattern MATCHFOUND Hello Testing"

edited Jul 11 '18 at 15:17

answered Jul 11 '18 at 14:17

cornacchia

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no need to escape `%` here, and no need to escape `(` and `)` inside `[]`, so `/%\([\w%()]*\)/g` is enough – Kaddath Jul 11 '18 at 15:14
That's right! Thank you for the comment, I will update the answer :) – cornacchia Jul 11 '18 at 15:17
That will also match things like `para %(w)(a)` or `%((((aaa)` – Julio Jul 11 '18 at 18:15

How can I regex match which finds only nested pattern

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