Function patchPrototype

packages/zone.js/lib/common/utils.ts:77–96

(prototype: any, fnNames: string[])

}

export function patchPrototype(prototype: any, fnNames: string[]) {
  const source = prototype.constructor['name'];
  for (let i = 0; i < fnNames.length; i++) {
    const name = fnNames[i];
    const delegate = prototype[name];
    if (delegate) {
      const prototypeDesc = ObjectGetOwnPropertyDescriptor(prototype, name);
      if (!isPropertyWritable(prototypeDesc)) {
        continue;
      }
      prototype[name] = ((delegate: Function) => {
        const patched: any = function (this: unknown) {
          return delegate.apply(this, bindArguments(<any>arguments, source + '.' + name));
        };
        attachOriginToPatched(patched, delegate);
        return patched;
      })(delegate);
    }
  }
}

export function isPropertyWritable(propertyDesc: any) {
  if (!propertyDesc) {