Async version of `string.prototype.replace`

asyncStringReplace.js

const asyncStringReplace = async (str, regex, aReplacer) => {
  regex = new RegExp(regex, regex.flags + regex.flags.includes('g')? '': 'g');
  const replacedParts = [];
  let match;
  let i = 0;
  while ((match = regex.exec(str)) !== null) {
    // put non matching string
    replacedParts.push(str.slice(i, match.index));
    // call the async replacer function with the matched array spreaded
    replacedParts.push(aReplacer(...match));
    i = regex.lastIndex;
  }

  // put the rest of str
  replacedParts.push(str.slice(i));

  // wait for aReplacer calls to finish and join them back into string
  return (await Promise.all(replacedParts)).join('');
};

exports default asyncStringReplace;