Hello Friends, In this tutorial we are going to discuss ng-blur directive in Angular. Also, we are going to create an example using ng-blur directive.
Introduction:
The ng-blur directive in angular js is used to specify what to do if an HTML element loses its focus. As like onblur event ng-blur directive is supported by all HTML element like textbox, select, textarea and hyperlink. Also, it doesn’t override the original onblur event.
An example of ng-blur Directive in Angular Js:
<!doctype html> <html> <head> <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.4/angular.min.js"></script> <title>AngularJS Directive Demo</title> <script src="angular.js"></script> <style> b{color:#fa4b2a;} input[type="text"].onFocus { background-color:#44c764; } input[type="text"].onBlur { background-color:#fa4b2a; } </style> </head> <div ng-app> <input type="text" ng-class="{ demoFocus: focus, demoBlur: blur }" ng-focus="focus=true;blur=false;" ng-blur="blur=true;focus=false;"> <!-- ng-blur directive --> <p>Focus State : <b>{{focus}}</b></p> <p>Blur State : <b>{{blur}}</b> </p> </div> <small>Example of Focus in and out of the input element to fire blur event</small> </html>
You can view the demo of the application here.
Example2:
I am going to create an example for validating UserName and Password using ng-blur directive.
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>Example2</title> <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.2/angular.min.js"></script> <link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css"> </head> <body ng-app="app"> <div class="container"> <div ng-controller="debugonwebctrl"> User Name: <input class="form-control" type="text" ng-blur="userName=false" ng-focus="userName=true"> <span style="color:red" ng-show="userName">Input your User name</span><br /> Password: <input class="form-control" type="text" ng-blur="password=false" ng-focus="password=true"> <span style="color:red" ng-hide="!password">Input your Password</span> </div> </div> <script> var app = angular.module("app", []); app.controller('debugonwebctrl', ['$scope', function ($scope) { }]); </script> </body> </html>
You can see the demo of the example here.
Hope you understand this tutorial of Angular Js. We will discuss on the bind-template directive in angular js.
You must take a look at the following links:
- ng-app directive in Angular Js.
- ng-model Directive in Angular Js.
- ng-bind Directive.
- ng-bind-html directive in Angular Js.
Thank You.
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