指令在角度 6 外单击

Question

I upgraded my Angular from 4 to 6, and consequently had a problem with my click-off policy, it stopped working on all components.

my directive:

import { Directive, Output, EventEmitter, ElementRef, HostListener } from '@angular/core';
    
@Directive({
  selector: '[clickOutside]'
})
export class ClickOutsideDirective {
    
  constructor(private _elementRef : ElementRef) { }
    
  @Output()
  public clickOutside = new EventEmitter();
   
  @HostListener('document:click', ['$event.target'])
  public onClick(targetElement) {
    const clickedInside = this._elementRef.nativeElement.contains(targetElement);
    if (!clickedInside) {
        this.clickOutside.emit(null);
    }
  }
}

My component.html that makes use of this directive:

<div 
  id="sidenav" 
  *ngIf="this.opened" 
  class="sidenav" 
  [ngClass]="getClasses()" 
  [ngStyle]="getStyles()" 
  clickOutside 
  (clickOutside)="closeOutsideSidenav()"
>
  <header> {{ navTitle }} </header>
  <i 
    *ngIf="this.showCloseButton" 
    class="iconic iconic-x-thin close-icon" 
    (click)="closeSidenav()"
  ></i>
  <ng-content></ng-content>
</div>
<div 
  *ngIf="this.backdrop && this.opened" 
  class="sidenav-backdrop"
></div>

Answer 1

view:

<div #insideElement></div>

component:

export class SomeClass {
  @ViewChild("insideElement") insideElement;
  @HostListener('document:click', ['$event.target'])

  public onClick(targetElement) {
    const clickedInside = this.insideElement.nativeElement.contains(targetElement);
    if (!clickedInside) {
      console.log('outside clicked');
    }
  }
}

Answer 2

You're referencing "this" in your template, which is not necessary. I made a working example of that directive:

https://stackblitz.com/edit/angular-piqewb

And theres no reason to have the directive on the div twice.

<div id="sidenav" *ngIf="opened" class="sidenav" [ngClass]="getClasses()" [ngStyle]="getStyles()" (clickOutside)="closeOutsideSidenav()">
    <header> {{ navTitle }} </header>
    <i *ngIf="showCloseButton" class="iconic iconic-x-thin close-icon" (click)="closeSidenav()"></i>
    <ng-content></ng-content>
</div>

<div *ngIf="backdrop && opened" class="sidenav-backdrop"></div>

Answer 3

This is a modification of @YoungHyeong Ryu answer above, but with unsubscription, so that the handler stops working when the component is unmounted.

DEMO https://stackblitz.com/edit/angular-1q4pga

import { Component, Input, OnInit, OnDestroy, ViewChild } from '@angular/core';

@Component({
  selector: 'app-click-outside',
  template: `<div #insideElement>Click outside me.</div>`
})
export class ClickOutsideComponent implements OnInit, OnDestroy  {
  @ViewChild('insideElement', { static: false }) insideElement;

  public ngOnInit() {
    this.onDocumentClick = this.onDocumentClick.bind(this);
    document.addEventListener('click', this.onDocumentClick);
  }

  public ngOnDestroy() {
    document.removeEventListener('click', this.onDocumentClick);
  }

  protected onDocumentClick(event: MouseEvent) {
    if (this.insideElement.nativeElement.contains(event.target)) {
      return;
    }
    console.log('Clicked outside!');
  }
}

Here, we remove the event listener on destroy. Also, normally a method added by addEventListener is executed in a global context (instead of this context); so we should take care of it and bind onDocumentClick method to this (we do it in ngOnInit ). Now we can use this inside onDocumentClick .

Answer 4

Run the inside NgZone .

Example:

export class AppComponent {
  opened: boolean = false;

  constructor(private ngZone: NgZone) {
  }

  closeOutsideSidenav(e) {
    this.ngZone.run(() => {
      this.opened = !this.opened;
    })
  }
}

I added my code to stackblitz. https://stackblitz.com/edit/angular-gyhtym (click outside of the "Highlight Me!")