AngularJS How to Create a Loader

Submitted by nurhodelta_17 on Wednesday, January 3, 2018 - 20:48.

Getting Started

I've used CDN for Bootstrap, Font-awesome and Angular JS so you need internet connection for them to work. The idea of loader is that when ever a certain event occurred, the loader will show. In this case of this tutorial, we're going to show the loader using ng-show on button click event.

index.html

This is our index which contains our buttons and loaders. In this tutorial, I have two loaders, one is font-awesome spinner and the second one is a .gif image.

<!DOCTYPE html>
<html lang="en" ng-app="app">
<head>
    <meta charset="utf-8">
    <title>AngularJS How to Create a Loader</title>
    <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
    <link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet">
    <script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>
    <link rel="stylesheet" type="text/css" href="style.css">
</head>
<body ng-controller="myController">
<div class="container">
    <h1 class="page-header text-center">AngularJS How to Create a Loader</h1>
    <div class="row text-center">
        <h2>Using Font-awesome Spinner</h2>
                <button class="btn btn-primary" ng-click="showLoader()">{{ loadName }} <i class="fa fa-spinner fa-pulse" ng-show="fontloader"></i></button>
                <button class="btn btn-warning" ng-click="stopLoader()">Stop</button>
        </div>
        <hr>
        <div class="row text-center">
        <h2>Using .gif Image with $timeout</h2>
                <button class="btn btn-primary" ng-click="showImgLoader()">{{ gifName }}</button>
                <button class="btn btn-warning" ng-click="stopImgLoader()">Stop</button>
        </div>
        <div class="row text-center">
                <img src="loader.gif" ng-show="imgloader">
        </div>
</div>
<script src="angular.js"></script>
</body>
</html>

angular.js

Lastly, this contains our Angular JS code.

var app = angular.module('app', []);
app.controller('myController',function($scope, $http, $timeout){
        $scope.loadName = 'Save';
    $scope.gifName = 'Save';
 
    //for font
    $scope.showLoader = function(){
        $scope.fontloader = true;
        $scope.loadName = 'Saving...';
    }
 
    $scope.stopLoader = function(){
        $scope.fontloader = false;
        $scope.loadName = 'Save';
    }
 
    //for img
    $scope.showImgLoader = function(){
        $scope.imgloader = true;
        $scope.gifName = 'Saving...';
 
        $timeout( function(){
            $scope.stopImgLoader();
        }, 5000 );
    }
 
    $scope.stopImgLoader = function(){
        $scope.imgloader = false;
        $scope.gifName = 'Save';
    }
 
});

That ends this tutorial. Happy Coding :)

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