Question

我想专注于基于其本机元素的元素。

我正在使用Angular 2，this.elem.nativeElement为我提供了所需的全部详细信息。但是我无法将重点放在 this.elem.nativeElement。

我想专注于id="dateEdit"。

请帮助我。

<div class="mydp" id="dtpid">
    <div class="selectiongroup">
        <div [formGroup]="form" class="ntt">
            <input type="text" id="{{controlName}}" [formControlName]="controlName" (click)="openBtnClicked()" (blur)="changeValue($event.currentTarget.value)" class="datePickAtUnique selection form-control" [ngClass]=" 
        {'invaliddate': invalidDate&&opts.indicateInvalidDate}" placeholder=" 
        {{opts.showDateFormatPlaceholder? 
        opts.dateFormat:opts.customPlaceholderTxt}}">
        </div>
        <span id="datePickAT" class="selbtngroup" [style.height]="opts.height">
        <button type="button" id="dateEdit" aria-label="Clear Date" 
        class="btnclear" *ngIf="selectionDayTxt.length>0" 
         (click)="removeBtnClicked()" [ngClass]="{'btnclearenabled': 
       !opts.componentDisabled, 'btncleardisabled': opts.componentDisabled}" 
       [disabled]="opts.componentDisabled">
          <span class="icon icon-cross" [ngStyle]="{'line-height': 
          opts.height}"></span>
        </button>
        <button type="button" id="dateChange" aria-label="Open Calendar" class="btnpicker" (click)="openBtnClicked()" [ngClass]=" 
        {'btnpickerenabled': !opts.componentDisabled, 'btnpickerdisabled': 
         opts.componentDisabled, 'disabled': disabled}" [disabled]="opts.componentDisabled">
            <span class="icon icon-calendar" [ngStyle]="{'line-height': 
             opts.height}"></span>
        </button>
        </span>
    </div>

Answer 1

克里斯·特恩布尔（Chris Turnbull）提供了一个github仓库。这是链接：Angular directive to set an element focus via the controller

将此包含到您的项目中。基本上，您要做的就是在要设置焦点的任何元素上使用 ng-set-focus 属性，并为其赋予一个值（必须唯一）。然后在控制器中使用 $ broadcast 将焦点放在该元素上。您必须在控制器中注入ngSetFocus服务。

示例：

In dom:
    <button ng-click="setFocusHere('button1')">Button 1</button>
    <button ng-click="setFocusHere('button2')">Button 2</button>

In controller:
     <script>
  angular.module('ngSetFocusDemo', ['ngSetFocus'])
    .controller('DemoController', function($scope) {

      $scope.setFocusHere = function(el){
        console.log(el)
        $scope.$broadcast(el);
      }

    })
</script>

Working example here

Answer 2

As my code shows, there are 2 buttons and I wanted the focus on the first button with id="dateEdit". I had said that .focus() always points to the first element with this id, it was because I was calling the .focus() before the element even loaded, for this I changed my angular 2 condition from "ngIf" to "hidden". I came up with this, that helped me,

var x = this.elem.nativeElement.getElementsByTagName("button")[0];
setTimeout(function(){
x.focus();
},100);

专注于当前的活动元素

2 个答案: