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AngularJS | ng-checked Directive

  • Last Updated : 26 Mar, 2019

The ng-checked Directive in AngularJS is used to read the checked or unchecked state of the checkbox or radiobutton to true or false. If the expression inside the ng-checked attribute returns true then the checkbox/radiobutton will be checked otherwise it will be unchecked.

Syntax:

<input type="checkbox|radio" ng-checked="expression"> Contents... </input>

If expression returns true then the element’s checked attribute will be checked.

Example: This example uses ng-checked Directive to select checkbox and return the all selected checkbox value.




<!DOCTYPE html>
<html>
      
<head>
    <title>ng-checked Directive</title>
  
    <script src=
    </script>
</head>
  
<body ng-app="app">
    <div ng-controller="geek">
        <h1 style="color:green">GeeksforGeeks</h1>
        <h2>ng-checked Directive</h2>
   
        <input type="checkbox" ng-checked="check1 &&
                check2 && check3 && check4 && check5"
                ng-model="isChecked" /><b>Select All</b><br>
              
        <input type="checkbox" ng-model="check1" 
            ng-checked="isChecked" />First<br>
          
        <input type="checkbox" ng-model="check2" 
            ng-checked="isChecked" />Second<br>
              
        <input type="checkbox" ng-model="check3"
            ng-checked="isChecked" />Three<br>
          
        <input type="checkbox" ng-model="check4" 
            ng-checked="isChecked" /> Four<br>
              
        <input type="checkbox" ng-model="check5"
            ng-checked="isChecked" />Five<br><br>
          
        <b>isAllSelected = {{isChecked}}</b>
    </div>
      
    <script>
        var app = angular.module("app", []);
        app.controller('geek', ['$scope', function ($scope) {
        }]);
    </script>
</body>
  
</html>

Output:
Before clicking the checkbox:
ng-checked
After clicking the checkbox (select all):
ng-checked




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