Ability to split regex into multiple lines and add comments in JS

multiline-regex.js

const partition = "aws-cn";

const multilineRegex = (...rest) => new RegExp(rest.map(x => (x instanceof RegExp) ? x.source : x).join(''));

const re = multilineRegex(
  /aws:/, // I can COMMENT!!!!
  partition,
  /:secretsmanager:cn-north-1:111111111111:/
);

console.log({
  a: re.test('aws:aws:secretsmanager:cn-north-1:111111111111:'),
  b: re.test('aws:aws-cn:secretsmanager:cn-north-1:111111111111:')
});