AngularJs ng-keypress Directive

What is ng-keypress directive? Why we use it?

The ng-keypress is used to specify to perform the custom behaviour on keypress event.

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

When you keypress on input textbox in the below example, the ngKeypress function get called. As you can see in the below controller function keypress get called after ngKeypress in TextBox.

The Example as,

//The HTML Code sample:
<div>
    First Name:<input type="text" ng-model="firstName" ng-keypress="keypress(IsActive)"> 
    Last Name: <input type="text" ng-model="lastName" ng-keypress="keypress(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.keypress = 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-keypress   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.keypress = 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-keypress="keypress(IsActive)"> 
            Last Name: <input type="text" ng-model="lastName" ng-keypress="keypress(IsActive)">         
        </div>
        <div>
            <div ng-show="IsActive"> <h3>Full Name: {{firstName + " " + lastName}} </h3></div>
        </div>
    </div>
</body>
</html>

The live output as,

About Blogger

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...
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