@angular/[email protected]
[email protected]

We fire change detection for all ReadyStateChange events + the Load event, even if all we are listening on is the Load event.

I looked into this and it seems that there is something wrong with the XHR patch in zone.js or less likely in NgZone.

The issue repro's with @angular/http or even with plain XMLHttpRequest object used as follows:

    var xhr = new XMLHttpRequest();
    xhr.open('GET', 'assets/data/data.json');
    xhr.onload = () => {
      console.log(xhr.responseText)
      this.processData(JSON.parse(xhr.responseText));
    };
    xhr.send();

If we switch over to using fetch (which is patched differently by zone.js), we trigger just one change detection.