javascript - AngularJS 指令中的设置模型为空

Question

我想在更改选中或未选中的复选框时将指令中的 modelvalue 设置为 Null。

HTML

<input type="checkbox" ng-model="isCheck"  />
    <select ng-model="empNmae" ng-setempty="isCheck" 
    ng-options="em.Value as em.Name for em in emp">
      <option value="">Select
    </select>
    {{empNmae}}

JS

// Code goes here
var app=angular.module('myApp',[]);
app.controller("mycntrl", function ($scope) {
$scope.emp=[{
  "Name":"Amit",
  "Value":101
},{
  "Name":"Amit2",
  "Value":103
},{
  "Name":"Amit3",
  "Value":102
}];
$scope.empNmae=102;
$scope.isCheck=true;
});

app.directive('ngSetempty', function () {
    return {
        restrict: 'A',
        require: 'ngModel',

        link: function (scope,element, attrs, ctrl) {
         scope.$watch(attrs.ngSetempty, function () {
                var getChekc=this.last;
                if(getChekc){
                 // set Model is NULL
                }
            });

        }
    };
});

如果选中复选框，那么我想将选择框的模型设置为空。<强> Plunker

Answer 1

您是否尝试过简单的:

delete $scope.empNmae

？