Regular expression to match a string having string inside parenthisis

June 28, 2023

I want a create a regular expression that matches the certain rules.

I found this RE – /^.*$.*$.*$/g but i also wanted to have validation on second string inside parenthesis.

eg-

 United Kingdom (English)

 Belgium (Dutch)

ie- expression for [string space string inside parenthesis with at least 3 length of inside string.].

Thank you in advance.

>Solution :

In JavaScript:

const pattern = /^[A-Za-z\s]+\([A-Za-z]{3,}\)$/;
const str1 = 'United Kingdom (English)';
const str2 = 'Belgium (Dutch)';

console.log(pattern.test(str1)); // true
console.log(pattern.test(str2)); // true

Explanation of the pattern:

^ asserts the start of the string.
[A-Za-z\s]+ matches one or more letters or spaces.
\( matches the opening parenthesis.
[A-Za-z]{3,} matches three or more letters (assumed to be the inside string you mentioned).
\) matches the closing parenthesis.
$ asserts the end of the string.