While using formControl, you have to import ReactiveFormsModule to your imports array. Example: import {FormsModule, ReactiveFormsModule} from ‘@angular/forms’; @NgModule({ imports: [ BrowserModule, FormsModule, ReactiveFormsModule, MaterialModule, ], … }) export class AppModule {}
<h1>My Application</h1> <select [(ngModel)]=”selectedValue”> <option *ngFor=”let c of countries” [ngValue]=”c”>{{c.name}}</option> </select> StackBlitz example NOTE: you can use [ngValue]=”c” instead of [ngValue]=”c.id” where c is the complete country object. [value]=”…” only supports string values [ngValue]=”…” supports any type update If the value is an object, the preselected instance needs to be identical with one of the … Read more
This is not related to an HTTP proxy. You have dependency conflict (incorrect and potentially broken dependency) as it says, so try to run the command with –force, or –legacy-peer-deps. If it doesn’t take effect, the temporary solution is using prior versions of the Node.js (downgrading the Node.js version) as it causes this kind of … Read more
I had a similar issue. Looking at the lifecycle hooks documentation, I changed ngAfterViewInit to ngAfterContentInit and it worked.
Specify the module using the –module parameter. For example, if the main module is app.module.ts, run this: ng g c new-component –module app Or if you are in an other directory then ng g c component-name –module ../
A @Component requires a view whereas a @Directive does not. Directives I liken a @Directive to an Angular 1.0 directive with the option restrict: ‘A’ (Directives aren’t limited to attribute usage.) Directives add behaviour to an existing DOM element or an existing component instance. One example use case for a directive would be to log … Read more
Actually you can take advantage of the built-in Location service, which owns a “Back” API. Here (in TypeScript): import {Component} from ‘@angular/core’; import {Location} from ‘@angular/common’; @Component({ // component’s declarations here }) class SomeComponent { constructor(private _location: Location) {} backClicked() { this._location.back(); } } Edit: As mentioned by @charith.arumapperuma Location should be imported from @angular/common … Read more
This is a new feature of NPM called ‘scoped packages’, which effectively allow NPM packages to be namespaced. Every user and organization on NPM has their own scope, and they are the only people who can add packages to it. This is useful for several reasons: It allows organizations to make it clear which packages … Read more
Angular v2 doesn’t support more than one structural directive on the same element. As a workaround use the <ng-container> element that allows you to use separate elements for each structural directive, but it is not stamped to the DOM. <ng-container *ngIf=”show”> <div *ngFor=”let thing of stuff”> {{log(thing)}} <span>{{thing.name}}</span> </div> </ng-container> <ng-template> (<template> before Angular v4) … Read more
In Angular 2 you can subscribe (Rx event) to a Router instance. So you can do things like class MyClass { constructor(private router: Router) { router.subscribe((val) => /*whatever*/) } } Edit (since rc.1) class MyClass { constructor(private router: Router) { router.changes.subscribe((val) => /*whatever*/) } } Edit 2 (since 2.0.0) see also : Router.events doc class … Read more