Get all regex matches in a string

get_all_regex_matches.ts

function getAllRegexMatches(regex: RegExp, string: string) {
  if (regex.constructor !== RegExp) {
    throw new Error('not RegExp');
  }

  const matches = [];
  let match = regex.exec(string);

  if (regex.global) {
    while (match) {
      matches.push(match);
      match = regex.exec(string);
    }
  } else if (match) {
    matches.push(match);
  }

  return matches;
}