NgZone is no longer functioning properly

Seemingly out of the blue, my NgZone functionality has ceased to work. I'm currently in the process of developing an application using Ionic, Angular, and Firebase.

An error is being thrown:

Unhandled Promise rejection: Missing Command Error ; Zone: ; Task: Promise.then ; Value: Missing Command Error undefined

This issue is particularly perplexing as I have been utilizing NgZone in my project for months without any complications. It is integrated into numerous sections of my codebase, but suddenly it has stopped functioning altogether.

I am importing NgZone in the typical manner:

import { Component, Input, NgZone, ViewChild, Injectable } from '@angular/core';

within the constructor:

public zone: NgZone,

and referencing it like so:

this.zone = new NgZone({});

this.afAuth.auth.onAuthStateChanged((user) => {
  this.zone.run(() => {
    if (user) {
      this.rootPage = HomePage
    } else {
      this.rootPage = LoginPage
      console.log("Not logged in")
    }
    this.splashScreen.hide();
  });
});

Despite all this, the NgZone feature is no longer operational...

The dependency called in my package.json is as follows:

"zone.js": "0.8.18"

Any insights on what may be causing this issue or recommended actions? Thank you!

Answer №1

Here are the steps you should follow:

1- Start by importing NgZone

import { Component, NgZone, OnInit} from '@angular/core';

2- Add the following line inside the constructor of your class

constructor(private ngZone: NgZone) {}

3- Make sure to delete this line from your code this.zone = new NgZone({});

4- Keep these lines of code intact

`this.afAuth.auth.onAuthStateChanged((user) => {
  this.zone.run(() => {
    if (user) {
      this.rootPage = HomePage
    } else {
      this.rootPage = LoginPage
      console.log("Not logged in")
    }
    this.splashScreen.hide();
  });
});`

Give it a try now....

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