Stop mouse event propagation

问题

What is the easiest way to stop mouse events propagation in Angular 2? Should I pass special $event object and call stopPropagation() myself or there is some other way. For example in Meteor I can simply return false from event handler.

回答1:

If you want to be able to add this to any elements without having to copy/paste the same code over and over again, you can make a directive to do this. It is as simple as below:

import {Directive, HostListener} from "@angular/core";

@Directive({
    selector: "[click-stop-propagation]"
})
export class ClickStopPropagation
{
    @HostListener("click", ["$event"])
    public onClick(event: any): void
    {
        event.stopPropagation();
    }
}

Then just add it to the element you want it on:

<div click-stop-propagation>Stop Propagation</div>

回答2:

The simplest is to call stop propagation on an event handler. $event works the same in Angular 2, and contains the ongoing event (by it a mouse click, mouse event, etc.):

(click)="onEvent($event)"

on the event handler, we can there stop the propagation:

onEvent(event) {
   event.stopPropagation();
}

回答3:

Calling stopPropagation on the event prevents propagation:

(event)="doSomething($event); $event.stopPropagation()"

For preventDefault just return false

(event)="doSomething($event); false"

回答4:

Adding to the answer from @AndroidUniversity. In a single line you can write it like so:

<component (click)="$event.stopPropagation()"></component>

回答5:

If you're in a method bound to an event, simply return false:

@Component({
  (...)
  template: `
    <a href="/test.html" (click)="doSomething()">Test</a>
  `
})
export class MyComp {
  doSomething() {
    (...)
    return false;
  }
}

回答6:

I had to stopPropigation and preventDefault in order to prevent a button expanding an accordion item that it sat above.

So...

@Component({
  template: `
    <button (click)="doSomething($event); false">Test</button>
  `
})
export class MyComponent {
  doSomething(e) {
    e.stopPropagation();
    // do other stuff...
  }
}

回答7:

Nothing worked for IE (Internet Explorer). My testers were able to break my modal by clicking off the popup window on buttons behind it. So, I listened for a click on my modal screen div and forced refocus on a popup button.

<div class="modal-backscreen" (click)="modalOutsideClick($event)">
</div>


modalOutsideClick(event: any) {
   event.preventDefault()
   // handle IE click-through modal bug
   event.stopPropagation()
   setTimeout(() => {
      this.renderer.invokeElementMethod(this.myModal.nativeElement, 'focus')
   }, 100)
}

回答8:

I just checked in an Angular 6 application, the event.stopPropagation() works on an event handler without even passing $event

(click)="doSomething()"  // does not require to pass $event


doSomething(){
   // write any code here

   event.stopPropagation();
}

回答9:

this worked for me : mycomponent.component.ts :

  action(event): void {
  event.stopPropagation();
  }

mycomponent.component.ts :

 <button mat-icon-button (click)="action($event);false">Click me !<button/>

回答10:

Disable href link with JavaScript

<a href="#" onclick="return yes_js_login();">link</a>

yes_js_login = function() {
     // Your code here
     return false;
}

How it should also work in TypeScript with Angular (My Version: 4.1.2)

Template

<a class="list-group-item list-group-item-action" (click)="employeesService.selectEmployeeFromList($event); false" [routerLinkActive]="['active']" [routerLink]="['/employees', 1]">
    RouterLink
</a>

TypeScript

public selectEmployeeFromList(e) {

    e.stopPropagation();
    e.preventDefault();

    console.log("This onClick method should prevent routerLink from executing.");

    return false;
}

But it does not disable the executing of routerLink!

回答11:

I used

<... (click)="..;..; ..someOtherFunctions(mybesomevalue); $event.stopPropagation();" ...>...

in short just seperate other things/function calls with ';' and add $event.stopPropagation()

回答12:

Adding false after function will stop event propagation

<a (click)="foo(); false">click with stop propagation</a>

回答13:

This solved my problem, from preventign that an event gets fired by a children:

doSmth(){
  // what ever
}

        <div (click)="doSmth()">
            <div (click)="$event.stopPropagation()">
                <my-component></my-component>
            </div>
        </div>

回答14:

Try this directive

@Directive({
    selector: '[stopPropagation]'
})
export class StopPropagatioDirective implements OnInit, OnDestroy {
    @Input()
    private stopPropagation: string | string[];

    get element(): HTMLElement {
        return this.elementRef.nativeElement;
    }

    get events(): string[] {
        if (typeof this.stopPropagation === 'string') {
            return [this.stopPropagation];
        }
        return this.stopPropagation;
    }

    constructor(
        private elementRef: ElementRef
    ) { }

    onEvent = (event: Event) => {
        event.stopPropagation();
    }

    ngOnInit() {
        for (const event of this.events) {
            this.element.addEventListener(event, this.onEvent);
        }
    }

    ngOnDestroy() {
        for (const event of this.events) {
            this.element.removeEventListener(event, this.onEvent);
        }
    }
}

Usage

<input 
    type="text" 
    stopPropagation="input" />

<input 
    type="text" 
    [stopPropagation]="['input', 'click']" />

来源：https://stackoverflow.com/questions/35274028/stop-mouse-event-propagation

标签

angular

dom-events

event-propagation