Blur not working - Angular 2

问题

I'm trying to set a blue event in angular 2 like so:

<div id="area-button" (blur)="unfocusAreaInput()" class="form-group" (click)="focusAreaInput()">

component.ts:

import { Component, ViewChild, ElementRef, Output, EventEmitter } from '@angular/core';
import { GoogleplaceDirective } from 'angular2-google-map-auto-complete/directives/googleplace.directive';

@Component({
    selector: 'my-area',
    directives: [GoogleplaceDirective],
    templateUrl: 'app/find-page/area-picker.component.html',
    styleUrls: ['app/find-page/area-picker.component.css']
})
export class AreaComponent {
    public address: Object;
    @ViewChild('areaInput') areaInput;
    areaSelected: boolean = false;
    @Output() onAreaSelected = new EventEmitter<boolean>();
    @Output() onAreaDeselected = new EventEmitter<boolean>();

    constructor(el: ElementRef) { }
    getAddress(place: Object) {
        this.address = place['formatted_address'];
        var location = place['geometry']['location'];
        var lat = location.lat();
        var lng = location.lng();
        console.log("Address Object", place);
    }

    focusAreaInput() {
        this.areaInput.nativeElement.focus();
        this.onAreaSelected.emit(true);
    }

        unfocusAreaInput() {
        this.onAreaSelected.emit(false);
    }
}

unfocusAreaInput() never gets executed. Why?

回答1:

Your blur event is not working because your div can't receive focus in the first place. If you add tabindex="1" (1 can be replaced with any number) or contentEditable (this will make div's content editable) to your div, it will be able to receive focus and then blur event will work. Plus, you can then use focus instead of click.

回答2:

You can also try (focusout)="unfocusAreaInput()" on your div. That will fire when any focusable element inside the div loses focus (incl. when the element is removed) and some other element in the div isn't simultaneously focused.

If you want to know what element lost focus inside your div, you can pass that in like so: (focusout)="unfocusAreaInput($event.target)".

More information here: https://developer.mozilla.org/en-US/docs/Web/API/Element/focusout_event

回答3:

Use tabindex property with it.Setting tabindex="0" will give it highest priority in getting focus thus your blur event will work

来源：https://stackoverflow.com/questions/39259775/blur-not-working-angular-2

标签

angular

blur