lock well-known built-in JS iterable prototypes

interventions.ts

const freezeProp = <T = any>(
  object: T,
  property: string | symbol | number,
  value = (object as any)[property],
): T =>
  Object.defineProperty(object, property, {
    value,
    configurable: false,
    writable: false,
    enumerable: false,
  });

const tamperResist = (): void => {
  const { childNodes: nodeList, children: htmlCollection } = document.createDocumentFragment();
  [
    [],
    new Set(),
    new Map(),
    nodeList,
    document.createElement('_').classList,
    htmlCollection,
    '',
  ].forEach((iterable) => {
    freezeProp(Object.getPrototypeOf(iterable), Symbol.iterator);
    Object.freeze(Object.getPrototypeOf(iterable[Symbol.iterator]()));
  });
  // proposed base iterator prototype API: https://github.com/tc39/proposal-iterator-helpers#extending-iterator-prototype
  const baseIteratorPrototype = (self as any)?.Iterator?.prototype;
  if (baseIteratorPrototype) {
    Object.freeze(baseIteratorPrototype);
  }
}

do not use with old versions of regenerator runtime: tc39/proposal-iterator-helpers#286