How to extract all matches with regex in JavaScript and Python

Extracting All Matches and Their Groups

match() with the g flag returns an array of full matches but drops group data. matchAll() returns an iterator of full match objects — each with group info intact.

const text = 'born 1990-01-15, died 2024-06-01';
const re = /(\d{4})-(\d{2})-(\d{2})/g;

for (const m of text.matchAll(re)) {
  console.log(m[1], m[2], m[3]);
}

matchAll() requires the g flag — calling it without g throws a TypeError.