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[英]How to detect changes in Component when user has changed something on the view in Angular 2?
[英]How to detect when route changed and new view replaced in Angular
我期待檢測路線何時更改並更換新視圖(html)。
嘗試下面的代碼,但不知道如何進一步。
this._routerSub = this.router.events
.filter(event => event instanceof NavigationEnd)
//.do(event => console.log(event)) //
.subscribe((value) => { });
也嘗試下面的代碼,但得到錯誤
Event類型的參數不能分配給'(value:Event)=> void'類型的參數。
import { Router, NavigationEnd, Event } from '@angular/router';
this._routerSub = this.router.events
.subscribe(event : Event) => {
if (event instanceof NavigationEnd) {
console.log(event.url);
}
});
下面的Vega是我的app.component.ts和app.component.ts代碼。 是不是假設在激活時調用onActivate。 由於路由器插座將在實例化新組件時發出激活事件。
app.component.html
<router-outlet (activate)="onActivate($event)" ></router-outlet>
app.component.ts
onActivate(e) {
debugger;
console.log(1);
}
如何使用router-outlet暴露activate
事件:
<router-outlet (activate)="onActivate($event)"></router-outlet>
onActivate(e) {
console.log(e.constructor.name);
//etc... you can access to a lot of other information
}
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