Get all matches when using regex

allMatches.js

function allMatches (regex, text) {
  if (!regex.global) throw new Error('option global not set')

  let matches = []

  while(true) {
    const match = regex.exec(text)
    if (!match) break;
    matches.push(match)
  }

  return matches
}

const matches = allMatches(/a|b|c/g, 'abcabcabc')

for(let item of matches) {
  console.log(item)
}