Check All , UnCheck All - AngularJs

Code to check and uncheck all using angularjs

HTML

<div>
    <ul ng-controller="checkboxController">
        <li>Check All
            <input type="checkbox" ng-model="selectedAll" ng-click="checkAll()" />
        </li>
        <li ng-repeat="item in Items">
            <label>{{item.Name}}
                <input type="checkbox" ng-model="item.Selected" ng-change="notifyMaster()"/>
            </label>
        </li>
    </ul>
</div>

JavaScript

angular.module("CheckAllModule", [])
    .controller("checkboxController", function checkboxController($scope) {


    $scope.Items = [{
        Name: "Item one"
    }, {
        Name: "Item two"
    }, {
        Name: "Item three"
    }];
    $scope.checkAll = function () {
        if ($scope.selectedAll) {
            $scope.selectedAll = true;
        } else {
            $scope.selectedAll = false;
        }
        angular.forEach($scope.Items, function (item) {
            item.Selected = $scope.selectedAll;
        });

    };
        
        $scope.notifyMaster = function () {
            $scope.selectedAll = !$scope.Items.some(function (item) {
               return !item.Selected;  //check if ANY are unchecked
            });
        }


});