I guess it’s a zone issue. Inject NgZone (import from angular2/core constructor(private zone:NgZone) {} this._browser.getStorageValue(‘api_key’, api_key => { if (api_key) { this.zone.run(() => this._browser.gotoMain()); } })
Why it is called twice Right now, if an error happens during detecting changes of content/view children of a component, ngOnInit will be called twice (seen in DynamicChangeDetector). This can lead to follow up errors that hide the original error. This information comes from this github issue So it seems that your mistake might have … Read more
Constructor is predefined default method of the typescript class. There is no relation between Angular and constructor. Normally we use constructor to define/initialize some variables, but when we have tasks related to Angular’s bindings we move to Angular’s ngOnInit life cycle hook. ngOnInit is called just after the constructor call. We can also do the … Read more
ngOnInit() is called after ngOnChanges() was called the first time. ngOnChanges() is called every time inputs are updated by change detection. ngAfterViewInit() is called after the view is initially rendered. This is why @ViewChild() depends on it. You can’t access view members before they are rendered.
You can inject the ActivatedRoute and subscribe to params constructor(route:ActivatedRoute) { route.params.subscribe(val => { // put the code from `ngOnInit` here }); } The router only destroys and recreates the component when it navigates to a different route. When only route params or query params are updated but the route is the same, the component … Read more
The Constructor is a default method of the class that is executed when the class is instantiated and ensures proper initialisation of fields in the class and its subclasses. Angular, or better Dependency Injector (DI), analyses the constructor parameters and when it creates a new instance by calling new MyClass() it tries to find providers … Read more