How to set checkbox checked on button click in AngularJS ?

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

Approach: The approach is to use the ng-checked 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 checkbox are checked by button. ng-model is used to bind the checkboxes.

Example 1:

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<!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>
    <p>
        How to set checkbox checked on
        button click in AngularJS
    </p>
    <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>

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Output:



Example 2:

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<!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>
    <p>
        How to set checkbox checked on
        button click in AngularJS
    </p>
    <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>

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Output:

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