Get index of each capture in a JavaScript regex

Question

I want to match a regex like /(a).(b)(c.)d/ with \"aabccde\", and get the following information back:

\"a\" at index = 0
\"b\" at i         


        

Answer 1

With RegExp.prototype.exec() and searching the properly indexes of the result:

let regex1 = /([a-z]+):([0-9]+)/g;
let str1 = 'hello:123';
let array1;
let resultArray = []

while ((array1 = regex1.exec(str1)) !== null) {
  const quantityFound = (Object.keys(array1).length - 3); // 3 default keys
  for (var i = 1; i