AngularJs ng-keydown Directive

What is ng-keydown directive? Why we use it?
The ng-keydown is used to specify to perform the custom behaviour on key down event.

If you want to add and fire a keydown event on HTML TextBox that time we need to use these events.

When you key down on input textbox in the below example, the ngKeydown function get called.

As you can see in the below controller function keydown get called after ngKeydown in TextBox.   

The example as,
//The HTML Code sample:
<div>
   First Name:<input type="text" ng-model="firstName" ng-keydown="keydown(IsActive)"> 
   Last Name: <input type="text" ng-model="lastName" ng-keydown="keydown(IsActive)">         
</div>

//The AngularJs Code sample:
 var app = angular.module('myApp', []);
app.controller('ngClickCtrl', function ($scope) {
            $scope.firstName = "Anil";
            $scope.lastName = "Singh";
            $scope.IsActive = false;

            $scope.keydown = function (IsActive) {
                if (!IsActive) {
                    $scope.IsActive = true;
                } else {
                    $scope.IsActive = false;
                }
            };
});

//The AngularJs and HTML code sample:
<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <title>What is ng-keydown directive? Why we use it?</title>
    @*<script src="https://code.angularjs.org/1.4.1/angular.js"></script>*@
    <script>
        var app = angular.module('myApp', []);
        app.controller('ngClickCtrl', function ($scope) {
            $scope.firstName = "Anil";
            $scope.lastName = "Singh";
            $scope.IsActive = false;

            $scope.keydown = function (IsActive) {
                if (!IsActive) {
                    $scope.IsActive = true;
                } else {
                    $scope.IsActive = false;
                }
            };
        });
    </script>
</head>
<body ng-app="myApp">
    <div ng-controller="ngClickCtrl">
        <div>
            First Name:<input type="text" ng-model="firstName" ng-keydown="keydown(IsActive)"> 
            Last Name: <input type="text" ng-model="lastName" ng-keydown="keydown(IsActive)">         
        </div>
        <div>
            <div ng-show="IsActive"> <h3>Full Name: {{firstName + " " + lastName}} </h3></div>
        </div>
    </div>
</body>
</html>

The live output as,

About Blogger

ANIL SINGH

Hey! I am Anil Singh. I am Active Blogger, Writer and Programmer. I love learning new technologies, programming, blogging and participating the forum discussions more...
http://www.code-sample.com
http://www.code-sample.xyz

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