{"id":2339,"date":"2016-08-31T07:48:19","date_gmt":"2016-08-31T07:48:19","guid":{"rendered":"http:\/\/www.jquery-az.com\/?p=2339"},"modified":"2023-09-24T13:42:21","modified_gmt":"2023-09-24T13:42:21","slug":"the-ng-change-in-ajgularjs-4-examples","status":"publish","type":"post","link":"https:\/\/www.jquery-az.com\/the-ng-change-in-ajgularjs-4-examples\/","title":{"rendered":"The ng-change in angularJS: 4 examples"},"content":{"rendered":"

The ng-change directive <\/strong><\/h3>\n

The angularJS ng-change directive, which is used with the input fields like textboxes, textarea, select etc, evaluates the given expression as the value is changed by the user.<\/p>\n

ng-change example – textbox\u00a0checkbox demo<\/h6>\n

As such, the JavaScript also supports onchange event where you may perform a\u00a0certain action as the value in an input field is changed. However, the difference and benefit of using the ng-change is that the given expression is evaluated immediately after the value is changed. The onchange event occurs or you may perform a\u00a0certain action as a\u00a0user leaves the input field or presses the enter\/return key (generally).<\/p>\n

ng-change with dropdown<\/h6>\n

However, as the ng-change enables us performing certain stuff as soon as the change is made (as a user is within the input element), this can be beneficial for different scenarios.<\/p>\n

Also, note that the ng-Change expression is checked only for the new value. If the value is not changed the expression will not be evaluated. For example, in a textbox, the value 5 is entered. The user deletes the value after selecting it and enters 5 again.<\/p>\n

Besides, the ng-change works with ng-model directive; so, as a new value is committed to the model, the expression is checked.<\/p>\n

Syntax of using ng-change directive<\/strong><\/h3>\n

Following is the general syntax of using the ng-change directive in AngularJS:<\/strong><\/p>\n

<input type=\u201dtext\u201d ng-change=”expression”><\/input><\/p><\/blockquote>\n

Where,\u00a0the input can be any HTML element like textbox, checkbox etc. You may also use textarea and select elements.<\/p>\n

A demo of np-change with textbox<\/strong><\/h3>\n

In this demo, a textbox is given for entering some text. As you start entering text, the lower div will be updated with the number of times the text is entered or np-change occurred. Note that, it also includes deletion of characters after entering the text.<\/p>\n

\"angularjs<\/p>\n

See online demo and code<\/strong><\/h6>\n

The code:<\/strong><\/p>\n

<body ng-app=\"ngchangedemo\">\r\n\r\n\u00a0\u00a0\u00a0 <div ng-controller=\"ngchangedemoController\">\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <div class=\"container\">\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <h3>A demo of np-change<\/h3>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <div class=\"col-sm-4 well\" ng-init=\"changed=0\">\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Enter some text:\u00a0 <input type=\"text\" class=\"form-control\" ng-change=\"someText()\" ng-model=\"text\" \/>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <div><b>Total number of times change occured:<\/b> {{changed}} <\/div>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/div>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/div>\r\n\r\n\u00a0\u00a0\u00a0 <\/div>\r\n\r\n<script>\r\n\r\n\u00a0\u00a0\u00a0 var app = angular.module(\"ngchangedemo\", []);\r\n\r\n\u00a0\u00a0\u00a0 app.controller('ngchangedemoController', ['$scope', function ($scope) {\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 $scope.isChange = false;\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 $scope.someText = function () {\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 $scope.isChange = true;\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 $scope.changed = $scope.changed + 1;\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }\r\n\r\n\u00a0\u00a0\u00a0 }]);\r\n\r\n<\/script><\/pre>\n
 <\/p>\n
In the <head> section, the Angular and Bootstrap libraries are included. Get the complete code from the demo page.<\/p>\n
In the demo, you may also test a point mentioned in intro section that np-change evaluates as a new value is committed to the model. For that, enter a text like \u201c5\u201d in the textbox. Select \u201c5\u201d and reenter.<\/p>\n
A demo with checkbox<\/strong><\/h3>\n
In this example, the np-change is used with the checkbox<\/strong>. The div below checkbox will be updated by the number of times checkbox is checked or unchecked. See the live demo and press checkbox and see how it updates:<\/p>\n
\"angularjs<\/p>\n
See online demo and code<\/strong><\/h6>\n
The code:<\/strong><\/p>\n
<body ng-app=\"ngchangedemo\">\r\n\r\n\u00a0\u00a0\u00a0 <div ng-controller=\"ngchangedemoController\">\r\n\r\n\u00a0\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 <div class=\"form-group\" ng-init=\"changed=0\">\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <div class=\"col-sm-offset-2 col-sm-10 well\">\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <h3>A demo of np-change<\/h3>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <div class=\"checkbox\">\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <label>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <input type=\"checkbox\" ng-change=\"chkChanged()\" ng-model=\"text\" > Remember me\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <div><b>Total number of times checkbox pressed<\/b> {{changed}} <\/div>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/label>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/div>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/div>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 <\/div>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/div>\r\n\r\n\u00a0\r\n\r\n<script>\r\n\r\n\u00a0\u00a0\u00a0 var app = angular.module(\"ngchangedemo\", []);\r\n\r\n\u00a0\u00a0\u00a0 app.controller('ngchangedemoController', ['$scope', function ($scope) {\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 $scope.isChange = false;\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 $scope.chkChanged = function () {\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 $scope.isChange = true;\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 $scope.changed = $scope.changed + 1;\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }\r\n\r\n\u00a0\u00a0\u00a0 }]);\r\n\r\n<\/script><\/pre>\n
Get the complete code from the demo page.<\/p>\n
A demo of using ng-change with select dropdown<\/strong><\/h3>\n
In this demo, an HTML select dropdown is used with a few options. Inside the select tag, the ng-change directive<\/em> is used. Inside the controller, the value of number of times the value is selected is incremented by one.<\/p>\n
\"angularjs-ng<\/p>\n
See online demo and code<\/strong><\/h6>\n
The code:<\/strong><\/p>\n
<body ng-app=\"ngchangedemo\">\r\n\r\n\u00a0\u00a0\u00a0 <div ng-controller=\"ngchangedemoController\">\r\n\r\n\u00a0\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 <div class=\"form-group\" ng-init=\"changed=0\">\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <div class=\"col-sm-offset-2 col-sm-10 well\">\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <h3>A demo of np-change<\/h3>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <div class=\"checkbox\">\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <label>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <select ng-change=\"chkChanged()\" class=\"form-control\" ng-model=\"selectDemo\">\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <option>1<\/option>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <option>2<\/option>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <option>3<\/option>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/select>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <div><b>Total number of times options selected<\/b> {{changed}} <\/div>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/label>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/div>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/div>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 <\/div>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/div>\r\n\r\n\u00a0\r\n\r\n<script>\r\n\r\n\u00a0\u00a0\u00a0 var app = angular.module(\"ngchangedemo\", []);\r\n\r\n\u00a0\u00a0\u00a0 app.controller('ngchangedemoController', ['$scope', function ($scope) {\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 $scope.isChange = false;\r\n\r\n\u00a0\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 $scope.chkChanged = function () {\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 $scope.isChange = true;\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 $scope.changed = $scope.changed + 1;\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }\r\n\r\n\u00a0\u00a0\u00a0 }]);\r\n\r\n<\/script><\/pre>\n
An example of show\/hide an HTML table using ng-change<\/strong><\/h3>\n
In this demo of explaining how ng-change angularJS directive works, I have used an HTML table which is styled with Bootstrap classes. Initially, the table is hidden as web page loads. As you click the \u201cShow\/Hide table\u201d checkbox, it will display. Upon clicking it again, the table will hide. Have a look at the live demo by clicking the link or image below:<\/p>\n
\"angularjs<\/p>\n
See online demo and code<\/strong><\/h6>\n
The code used in demo:<\/strong><\/p>\n
<body ng-app=\"ngchangedemo\">\r\n\r\n\u00a0\u00a0\u00a0 <div ng-controller=\"ngchangedemo\">\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <div class=\"container\">\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <div class=\"col-md-3 well\">\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Show\/Hide Table: <input type=\"checkbox\" ng-model=\"showhidetable\" ng-change=\"SHTable(showhidetable)\" \/> <br>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/div>\r\n\r\n\u00a0\r\n\r\n\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<table class=\"table table-bordered table-striped\" ng-show='showhideprop'>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <tr>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <th>Product ID<\/th>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <th>Product Name<\/th>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <th>Product Quality<\/th>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<th>Product Quantity<\/th>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/tr>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <tr>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <td>1<\/td>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <td>Wheat<\/td>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <td>Good<\/td>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <td>200 Bags<\/td>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/tr>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <tr>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <td>2<\/td>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <td>Rice<\/td>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <td>Good<\/td>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <td>250 Bags<\/td>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <tr>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <td>3<\/td>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <td>Sugar<\/td>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <td>Good<\/td>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <td>200 Bags<\/td>\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/tr>\u00a0\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/table>\r\n\r\n\u00a0\r\n\r\n\u00a0\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/div>\r\n\r\n\u00a0\u00a0\u00a0 <\/div>\r\n\r\n<script>\r\n\r\n\u00a0\u00a0\u00a0 var app = angular.module(\"ngchangedemo\", []);\r\n\r\n\u00a0\u00a0\u00a0 app.controller('ngchangedemo', ['$scope', function ($scope) {\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 $scope.SHTable = function (showhidetable) {\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 $scope.showhideprop = showhidetable;\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }\r\n\r\n\u00a0\u00a0\u00a0 }]);\r\n\r\n<\/script><\/pre>\n
You can see, the status of table is checked on each click of the checkbox in controller. If this is hidden, the table will display and vice versa.<\/p>\n","protected":false},"excerpt":{"rendered":"
The ng-change directive The angularJS ng-change directive, which is used with the input fields like textboxes, textarea, select etc, evaluates the given expression as the value is changed by the user. ng-change example – textbox\u00a0checkbox demo As such, the JavaScript also supports onchange event where you may perform a\u00a0certain action as the value in an … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":2340,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[18],"tags":[],"yoast_head":"\nThe ng-change in angularJS: 4 examples<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.jquery-az.com\/the-ng-change-in-ajgularjs-4-examples\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The ng-change in angularJS: 4 examples\" \/>\n<meta property=\"og:description\" content=\"The ng-change directive The angularJS ng-change directive, which is used with the input fields like textboxes, textarea, select etc, evaluates the given expression as the value is changed by the user. ng-change example – textbox\u00a0checkbox demo As such, the JavaScript also supports onchange event where you may perform a\u00a0certain action as the value in an ... 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