How to set checkbox checked on button click in AngularJS?

Last Updated : 01 Aug, 2022

In this article, we will see how to set checkboxes checked with the click of a button in AngularJS.

Approach: The approach is to use the ng-checked directive to check the checkbox in the DOM. In the first example, a single checkbox is checked by the button and In the second example, multiple checkboxes are checked by the button. The ng-model directive is used to bind the checkboxes.

Example 1: This example describes the implementation of the ng-checked directive to check the checkbox in AngularJS.

HTML

<!DOCTYPE HTML>
<html>
 
<head>
    <script src=
"//ajax.googleapis.com/ajax/libs/angularjs/1.2.13/angular.min.js">
    </script>
 
    <script>
        var myApp = angular.module("app", []);
        myApp.controller("controller", function ($scope) {
            $scope.checkIt = function () {
                if (!$scope.check) {
                    $scope.check = true;
                } else {
                    $scope.check = false;
                }
            }
        });
    </script>
</head>
 
<body style="text-align:center;">
    <h1 style="color:green;">
        GeeksforGeeks
    </h1>
    <h3>
        How to set checkbox checked on
        button click in AngularJS
    </h3>
    <div ng-app="app">
        <div ng-controller="controller">
            Checkbox: <input type="checkbox" ng-checked="check">
            <br>
            <br>
            <button ng-click="checkIt()" ng-model='check'>
                Click to Check
            </button>
            <br>
            <br>
        </div>
    </div>
</body>
</html>

Output:

Example 2: This example describes the implementation of the ng-checked directive by specifying the multiple checkboxes to check by clicking the button in AngularJS.

HTML

<!DOCTYPE HTML>
<html>
 
<head>
    <script src=
"//ajax.googleapis.com/ajax/libs/angularjs/1.2.13/angular.min.js">
    </script>
 
    <script>
        var myApp = angular.module("app", []);
        myApp.controller("controller", function ($scope) {
            $scope.checkIt = function () {
                if (!$scope.check) {
                    $scope.check = true;
                } else {
                    $scope.check = false;
                }
            }
        });
    </script>
</head>
 
<body style="text-align:center;">
    <h1 style="color:green;">
        GeeksforGeeks
    </h1>
    <h3>
        How to set checkbox checked on
        button click in AngularJS
    </h3>
    <div ng-app="app">
        <div ng-controller="controller">
            Checkbox1: <input type="checkbox"
                              ng-checked="check">
            <br>
            Checkbox2: <input type="checkbox"
                              ng-checked="check">
            <br>
            Checkbox3: <input type="checkbox"
                              ng-checked="check">
            <br><br>
            <button ng-click="checkIt()"
                    ng-model='check'>
                Click to Check
            </button>
            <br><br>
        </div>
    </div>
</body>
</html>