Can zone-free window methods (setTimeout, etc) be accessed somehow with loaded Zone.js ? Does Zone.js expose the original unpatched methods?

The example of possible use case is Angular 2 app that has some problems with Angular 2 Material data binding and needs to call un-zoned setTimeout as temporary but instant workaround - before the issue will be fixed properly.

Can zone-free window methods (setTimeout, etc) be accessed somehow with loaded Zone.js ? Does Zone.js expose the original unpatched methods?

The example of possible use case is Angular 2 app that has some problems with Angular 2 Material data binding and needs to call un-zoned setTimeout as temporary but instant workaround - before the issue will be fixed properly.

• javascript
• typescript
• angular
• zonejs

5 Answers 5

yes, basically the native method can be access by

target[Zone['__symbol__'](methodName)]

or target['zone_symbol'methodName]

such as

window['__zone_symbol__setTimeout']

and you can access NativePromise by

window['__zone_symbol__Promise']

I will make a list later.

I think that you need to leverage NgZone and its runOutsideAngular method for this. Here is a sample:

constructor(private ngZone:NgZone) {
}

setTimeout(() => {
  this.ngZone.runOutsideAngular(() => {
    // do something
  });
}, 1000);

Adding to the answer, the original methods can be reached with __zone_symbol__ prefix, as of Zone.js 0.6.12 (may be a subject to change).

I.e. window.__zone_symbol__setTimeout, etc.

I do like this:

const w: any = window
export const setTimeoutNoZone: typeof setTimeout = w.__zone_symbol__setTimeout
export const setIntervalNoZone: typeof setInterval = w.__zone_symbol__setInterval

And then use them in places where ChangeDetection is not needed:

setTimeoutNoZone(() => { ... }, 1000)

You should also take care for Promise::then

I've implemented the following util functions in my project

function jb_new_NativePromise(cb) {
  if (window && window.__zone_symbol__Promise) {
    var res = new __zone_symbol__Promise(cb);
    res.then = res.__zone_symbol__then;
    return res;
  }

  return new Promise(cb);
}

function jb_NativePromise_resolve(obj) {
  return jb_new_NativePromise(resolve=>resolve(obj))
}

function jb_native_delay(ms) {
  var set_timeout = window && window.__zone_symbol__setTimeout || setTimeout;
  return jb_new_NativePromise(resolve => set_timeout(resolve, ms));
}