angular2-changedetection

问题 This article mentions that Ivy opens a few possibilities for the future though. It should now be possible to run an application without zone.js, and to semi-manually handle change detection (a bit like you would with React). These APIs already exist but are experimental, not documented, and will probably change in the near future. I think it was already possible to run an application without zone.js prior to Ivy. Does Ivy allow to semi-manually handle change detection? Where are those

问题 This article mentions that Ivy opens a few possibilities for the future though. It should now be possible to run an application without zone.js, and to semi-manually handle change detection (a bit like you would with React). These APIs already exist but are experimental, not documented, and will probably change in the near future. I think it was already possible to run an application without zone.js prior to Ivy. Does Ivy allow to semi-manually handle change detection? Where are those

来源： https://stackoverflow.com/questions/62033196/will-using-angular-reactive-forms-get-method-in-template-cause-unnecessary-me

来源： https://stackoverflow.com/questions/62033196/will-using-angular-reactive-forms-get-method-in-template-cause-unnecessary-me

来源： https://stackoverflow.com/questions/62033196/will-using-angular-reactive-forms-get-method-in-template-cause-unnecessary-me

来源： https://stackoverflow.com/questions/62033196/will-using-angular-reactive-forms-get-method-in-template-cause-unnecessary-me

来源： https://stackoverflow.com/questions/39687560/angular-2-forms-onpush

来源： https://stackoverflow.com/questions/57862153/angular-8-value-wont-update-on-view-after-change

问题 I'm trying to automatically select the first value from set of options in <mat-autocomplete ...> export class ExampleComponent implements OnInit, AfterViewInit { @ViewChildren('auto') matAutocomplete: QueryList<any>; constructor(private cdr: ChangeDetectorRef) { } ngAfterViewInit() { this.foundItemsList.changes.subscribe(options => { // ---> This simply works! setTimeout(() => this.matAutocomplete.first._keyManager.setFirstItemActive(), 0); // ---> This doesn't works?! No error shown, it just

问题 I have an array of objects (let's call it arr ). In one of my component's inputs in the (change) method I modify one of these object's attribute, but in the view ( *ngFor ) nothing changes. I read that Angular2 change detection doesn't check the contents of arrays or object, so I tried these: this.arr = this.arr.slice(); and this.arr = [...this.arr]; But the view doesn't change, it still shows the old attribute. In the (change) method with console.log() I got the correct array. Weird, but