{"id":22403,"date":"2018-08-14T16:15:30","date_gmt":"2018-08-14T13:15:30","guid":{"rendered":"http:\/\/www.webcodegeeks.com\/?p=22403"},"modified":"2018-08-22T13:02:13","modified_gmt":"2018-08-22T10:02:13","slug":"angularjs-toggle-class-using-ng-class-example","status":"publish","type":"post","link":"https:\/\/www.webcodegeeks.com\/javascript\/angular-js\/angularjs-toggle-class-using-ng-class-example\/","title":{"rendered":"AngularJS Toggle Class using ng-class Example"},"content":{"rendered":"<p>Hello readers, in this tutorial, developers will learn what <em>AngularJS<\/em> is and how to toggle the CSS class using the <code>ng-class<\/code> and <code>ng-click<\/code> angular directives.<\/p>\n<h2>1. Introduction<\/h2>\n<p><em>AngularJS<\/em> is a JavaScript MVC or Model-View-Controller framework developed by Google that lets developers build well structured, easily testable, and maintainable front-end applications. Before we start with the creation of a real application using the angular framework, let us see the important parts of an angular application.<br \/>\n[ulp id=&#8217;LXJcMJZXSsqGXYW8&#8242;]<\/p>\n<h4>1.1.1 Templates<\/h4>\n<p>In angular, a <span style=\"text-decoration: underline;\">template<\/span> is an <code>HTML<\/code> with added markups. AngularJS library compiles the templates and renders the resultant <code>HTML<\/code> page.<\/p>\n<h4>1.1.2 Directives<\/h4>\n<p><span style=\"text-decoration: underline;\">Directives<\/span> are the markers (i.e. attributes) on a DOM element that tell angular to attach a specific behavior to that DOM element or even transform the DOM element and its children. Most of the directives in the angular library start with the prefix <code>ng<\/code>. Below is the list of important directives that are available in the angular library.<\/p>\n<ul>\n<li><code>ng-app<\/code>: The <code>ng-app<\/code> directive is a <em>starting point<\/em>. If the AngularJS framework finds the <code>ng-app<\/code> directive anywhere in the <code>HTML<\/code> document, it bootstraps (i.e. initializes) itself and compiles the <code>HTML<\/code> template<\/li>\n<li><code>ng-model<\/code>: The <code>ng-model<\/code> directive binds an <code>HTML<\/code> element to a property on the <code>$scope<\/code> object. It also binds the values of AngularJS application data to the <code>HTML<\/code> input controls.<\/li>\n<li><code>ng-bind<\/code>: The <code>ng-bind<\/code> directive binds the AngularJS application data to the <code>HTML<\/code> tags<\/li>\n<li><code>ng-controller<\/code>: The <code>ng-controller<\/code> directive specifies a controller in the <code>HTML<\/code> element. This controller will add behavior or maintain the data in that <code>HTML<\/code> element and its child elements<\/li>\n<li><code>ng-repeat<\/code>: The <code>ng-repeat<\/code> directive repeat a set of <code>HTML<\/code> elements for each item in a given collection<\/li>\n<\/ul>\n<h4>1.1.3 Expressions<\/h4>\n<p>An <span style=\"text-decoration: underline;\">expression<\/span> is like a JavaScript code usually wrapped inside the double curly braces such as <code>{{ expression }}<\/code>. AngularJS library evaluates the expression and produces a result.<\/p>\n<p>These new APIs make developer&#8217;s life easier, really! But it would be difficult for a beginner to understand this without an example. Therefore, let us create a simple application using the <code>ng-class<\/code> and <code>ng-click<\/code> angular directives.<\/p>\n<h2>2. AngularJS Toggle Class Using Ng-click Example<\/h2>\n<p>Here is a step-by-step guide for implementing this tutorial in the angular applications.<\/p>\n<h3>2.1 Tools Used<\/h3>\n<p>We are using Eclipse Kepler SR2, JDK 8 and Maven. Having said that, we have tested the code against JDK 1.7 and it works well.<\/p>\n<h3>2.2 Project Structure<\/h3>\n<p>Firstly, let\u2019s review the final project structure if you are confused about where you should create the corresponding files or folder later!<\/p>\n<figure id=\"attachment_22437\" aria-describedby=\"caption-attachment-22437\" style=\"width: 254px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/08\/angularjs-toggleclass-example_project_structure_guide_1.jpg\"><img decoding=\"async\" class=\"wp-image-22437 size-medium\" src=\"http:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/08\/angularjs-toggleclass-example_project_structure_guide_1-254x300.jpg\" alt=\"AngularJS Toggle Class using ng-class - Application Project Structure\" width=\"254\" height=\"300\" srcset=\"https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/08\/angularjs-toggleclass-example_project_structure_guide_1-254x300.jpg 254w, https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/08\/angularjs-toggleclass-example_project_structure_guide_1.jpg 307w\" sizes=\"(max-width: 254px) 100vw, 254px\" \/><\/a><figcaption id=\"caption-attachment-22437\" class=\"wp-caption-text\">Fig. 1: Application Project Structure<\/figcaption><\/figure>\n<h3>2.3 Project Creation<\/h3>\n<p>This section will show how to create a Java-based Maven project with Eclipse. In Eclipse Ide, go to <code>File -&gt; New -&gt; Maven Project<\/code>.<\/p>\n<figure id=\"attachment_22353\" aria-describedby=\"caption-attachment-22353\" style=\"width: 657px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/07\/angularjs-pageload-example_project_guide_1.jpg\"><img decoding=\"async\" class=\"wp-image-22353 size-full\" src=\"http:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/07\/angularjs-pageload-example_project_guide_1.jpg\" alt=\"AngularJS Toggle Class using ng-class - Maven Project\" width=\"657\" height=\"690\" srcset=\"https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/07\/angularjs-pageload-example_project_guide_1.jpg 657w, https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/07\/angularjs-pageload-example_project_guide_1-286x300.jpg 286w\" sizes=\"(max-width: 657px) 100vw, 657px\" \/><\/a><figcaption id=\"caption-attachment-22353\" class=\"wp-caption-text\">Fig. 2: Create a Maven Project<\/figcaption><\/figure>\n<p>In the New Maven Project window, it will ask you to select project location. By default, &#8216;Use default workspace location&#8217; will be selected. Just click on next button to proceed.<\/p>\n<figure id=\"attachment_22354\" aria-describedby=\"caption-attachment-22354\" style=\"width: 598px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/07\/angularjs-pageload-example_project_guide_2.jpg\"><img decoding=\"async\" class=\"wp-image-22354 size-full\" src=\"http:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/07\/angularjs-pageload-example_project_guide_2.jpg\" alt=\"AngularJS Toggle Class using ng-class - Project Details\" width=\"598\" height=\"543\" srcset=\"https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/07\/angularjs-pageload-example_project_guide_2.jpg 598w, https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/07\/angularjs-pageload-example_project_guide_2-300x272.jpg 300w\" sizes=\"(max-width: 598px) 100vw, 598px\" \/><\/a><figcaption id=\"caption-attachment-22354\" class=\"wp-caption-text\">Fig. 3: Project Details<\/figcaption><\/figure>\n<p>Select the &#8216;Maven Web App&#8217; Archetype from the list of options and click next.<\/p>\n<figure id=\"attachment_22355\" aria-describedby=\"caption-attachment-22355\" style=\"width: 597px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/07\/angularjs-pageload-example_project_guide_3.jpg\"><img decoding=\"async\" class=\"wp-image-22355 size-full\" src=\"http:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/07\/angularjs-pageload-example_project_guide_3.jpg\" alt=\"AngularJS Toggle Class using ng-class - Archetype Selection\" width=\"597\" height=\"541\" srcset=\"https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/07\/angularjs-pageload-example_project_guide_3.jpg 597w, https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/07\/angularjs-pageload-example_project_guide_3-300x272.jpg 300w\" sizes=\"(max-width: 597px) 100vw, 597px\" \/><\/a><figcaption id=\"caption-attachment-22355\" class=\"wp-caption-text\">Fig. 4: Archetype Selection<\/figcaption><\/figure>\n<p>It will ask you to &#8216;Enter the group and the artifact id for the project&#8217;. We will enter the details as shown in the below image. The version number will be by default: <code>0.0.1-SNAPSHOT<\/code>.<\/p>\n<figure id=\"attachment_22438\" aria-describedby=\"caption-attachment-22438\" style=\"width: 597px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/08\/angularjs-toggleclass-example_project_guide_4.jpg\"><img decoding=\"async\" class=\"wp-image-22438 size-full\" src=\"http:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/08\/angularjs-toggleclass-example_project_guide_4.jpg\" alt=\"AngularJS Toggle Class using ng-class - Archetype Parameters\" width=\"597\" height=\"536\" srcset=\"https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/08\/angularjs-toggleclass-example_project_guide_4.jpg 597w, https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/08\/angularjs-toggleclass-example_project_guide_4-300x269.jpg 300w\" sizes=\"(max-width: 597px) 100vw, 597px\" \/><\/a><figcaption id=\"caption-attachment-22438\" class=\"wp-caption-text\">Fig. 5: Archetype Parameters<\/figcaption><\/figure>\n<p>Click on Finish and the creation of a maven project is completed. If you see, it has downloaded the maven dependencies and a <code>pom.xml<\/code> file will be created. It will have the following code:<\/p>\n<p><span style=\"text-decoration: underline;\"><em>pom.xml<\/em><\/span><\/p>\n<pre class=\"brush:xml; wrap-lines:false;\">&lt;project xmlns=\"http:\/\/maven.apache.org\/POM\/4.0.0\" xmlns:xsi=\"http:\/\/www.w3.org\/2001\/XMLSchema-instance\" xsi:schemaLocation=\"http:\/\/maven.apache.org\/POM\/4.0.0 http:\/\/maven.apache.org\/xsd\/maven-4.0.0.xsd\"&gt;\r\n\t&lt;modelVersion&gt;4.0.0&lt;\/modelVersion&gt;\r\n\t&lt;groupId&gt;com.angular&lt;\/groupId&gt;\r\n\t&lt;artifactId&gt;AngularToggleClassNgClass&lt;\/artifactId&gt;\r\n\t&lt;version&gt;0.0.1-SNAPSHOT&lt;\/version&gt;\r\n\t&lt;packaging&gt;war&lt;\/packaging&gt;\r\n&lt;\/project&gt;\r\n<\/pre>\n<p>Let\u2019s start building the application!<\/p>\n<h2>3. Application Building<\/h2>\n<p>Let\u2019s create an application to understand the basic building blocks of this tutorial.<\/p>\n<h3>3.1 Load the AngularJS framework<\/h3>\n<p>Since it is a pure JavaScript framework, we should add its reference using the <code>&lt;script&gt;<\/code> tag.<\/p>\n<pre class=\"brush:js; wrap-lines:false;\">&lt;script type=\"text\/javascript\" src=\"https:\/\/ajax.googleapis.com\/ajax\/libs\/angularjs\/1.7.2\/angular.min.js\"&gt;&lt;\/script&gt;\r\n<\/pre>\n<h3>3.2 Define the AngularJS application<\/h3>\n<p>Next, we will define the AngularJS application using the <code>&lt;ng-app&gt;<\/code>, <code>&lt;ng-controller&gt;<\/code> directives.<\/p>\n<p><span style=\"text-decoration: underline;\"><em>index.jsp<\/em><\/span><\/p>\n<pre class=\"brush:html; wrap-lines:false;\">&lt;div ng-app=\"app\" ng-controller=\"ctrl\"&gt;\r\n\t&lt;button type=\"button\" ng-click=\"someFunction()\"&gt;Toggle&lt;\/button&gt;\r\n\t\r\n\t&lt;div ng-class=\"myClass\"&gt;\r\n\t\tSome text.\r\n\t&lt;\/div&gt;\r\n&lt;\/div&gt;\r\n<\/pre>\n<h3>3.3 Complete Application<\/h3>\n<p>In this example, we will use the <code>ng-click<\/code> angular directive to call and execute a function on a button click. To illustrate further, we are displaying a sample text that will change its font-color on a button click. Complete the above steps and I will show you how to use the <code>ng-class<\/code> angular directive to change the font color on a button click. Let\u2019s see the sample code snippet.<\/p>\n<p><span style=\"text-decoration: underline;\"><em>index.jsp<\/em><\/span><\/p>\n<pre class=\"brush: html; wrap-lines:false;\">&lt;!DOCTYPE html&gt;\r\n&lt;html&gt;\r\n\t&lt;head&gt;\r\n\t    &lt;meta http-equiv=\"Content-Type\" content=\"text\/html; charset=UTF-8\"&gt;\r\n\t    &lt;title&gt;AngularJS ToggleClass&lt;\/title&gt;\r\n\t\r\n\t    &lt;!-- AngularJs File --&gt;\r\n\t    &lt;script type=\"text\/javascript\" src=\"resource\/js\/angular_v1.6.0.js\"&gt;&lt;\/script&gt;\r\n\t\r\n\t    &lt;!-- Bootstrap Css --&gt;\r\n\t    &lt;link rel=\"stylesheet\" href=\"https:\/\/maxcdn.bootstrapcdn.com\/bootstrap\/4.0.0\/css\/bootstrap.min.css\"&gt;\r\n\t    \r\n\t    &lt;script type=\"text\/javascript\"&gt;\r\n\t\t    var mainApp = angular.module(\"app\", []);\r\n\t\t    mainApp.controller('ctrl', ['$scope', function ($scope) {\r\n\t\r\n\t\t    \t$scope.myClass = { red: false };\r\n\t\t    \t\/\/ Method to toggle the css class.\r\n\t\t    \t$scope.toggleClass = function() {\r\n\t\t    \t      $scope.myClass.red = !$scope.myClass.red;\r\n\t\t    \t}\r\n\t\t    }]);\r\n\t    &lt;\/script&gt;\r\n\t    \r\n\t    &lt;style type=\"text\/css\"&gt;\r\n\t    \t.red {\r\n\t\t\t  color:red;\r\n\t\t\t}\r\n\t    &lt;\/style&gt;\r\n\t&lt;\/head&gt;\r\n\t&lt;body&gt;\r\n\t    &lt;div id=\"angularToggle\" class=\"container\"&gt;\r\n\t        &lt;h1 align=\"center\" class=\"text-primary\"&gt;AngularJS - Toggle Class Example&lt;\/h1&gt;\r\n\t        &lt;hr \/&gt;\r\n\t\r\n\t        &lt;!------ AngularJs Toggle CSS Class Example ------&gt;\r\n\t        &lt;div ng-app=\"app\" ng-controller=\"ctrl\"&gt;\r\n\t        \t&lt;button type=\"button\" class=\"btn btn-outline-primary\" ng-click=\"toggleClass()\"&gt;Toggle&lt;\/button&gt;\r\n\t\t\t\t&lt;div&gt;\u00a0&lt;\/div&gt;\r\n\t\t\t\t\r\n\t            &lt;div id=\"divId\" ng-class=\"myClass\"&gt;\r\n  \t\t\t\t\tThis text color can be changed on button toggle.\r\n\t\t\t\t&lt;\/div&gt;\r\n\t        &lt;\/div&gt;\r\n\t    &lt;\/div&gt;\r\n\t&lt;\/body&gt;\r\n&lt;\/html&gt;\r\n<\/pre>\n<h2>4. Run the Application<\/h2>\n<p>As we are ready for all the changes, let us compile the project and deploy the application on the Tomcat7 server. To deploy the application on Tomat7, right-click on the project and navigate to <code>Run as -&gt; Run on Server<\/code>.<\/p>\n<figure id=\"attachment_22439\" aria-describedby=\"caption-attachment-22439\" style=\"width: 819px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/08\/angularjs-toggleclass-example_project_structure_deploy_guide_1.jpg\"><img decoding=\"async\" class=\"wp-image-22439 size-full\" src=\"http:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/08\/angularjs-toggleclass-example_project_structure_deploy_guide_1.jpg\" alt=\"AngularJS Toggle Class using ng-class - Deploy Application on Tomcat\" width=\"819\" height=\"419\" srcset=\"https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/08\/angularjs-toggleclass-example_project_structure_deploy_guide_1.jpg 819w, https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/08\/angularjs-toggleclass-example_project_structure_deploy_guide_1-300x153.jpg 300w, https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/08\/angularjs-toggleclass-example_project_structure_deploy_guide_1-768x393.jpg 768w\" sizes=\"(max-width: 819px) 100vw, 819px\" \/><\/a><figcaption id=\"caption-attachment-22439\" class=\"wp-caption-text\">Fig. 6: How to Deploy Application on Tomcat<\/figcaption><\/figure>\n<p>Tomcat will deploy the application in its web-apps folder and shall start its execution to deploy the project so that we can go ahead and test it in the browser.<\/p>\n<h2>5. Project Demo<\/h2>\n<p>Open your favorite browser and hit the following URL. The output page will be displayed.<\/p>\n<pre class=\"brush:plain; wrap-lines:false;\">http:\/\/localhost:8082\/AngularToggleClassNgClass\/<\/pre>\n<p>Server name (localhost) and port (8082) may vary as per your Tomcat configuration.<\/p>\n<figure id=\"attachment_22440\" aria-describedby=\"caption-attachment-22440\" style=\"width: 819px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/08\/angularjs-toggleclass-example-demo-guide-1.jpg\"><img decoding=\"async\" class=\"wp-image-22440 size-full\" src=\"http:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/08\/angularjs-toggleclass-example-demo-guide-1.jpg\" alt=\"AngularJS Toggle Class using ng-class - Application Output\" width=\"819\" height=\"192\" srcset=\"https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/08\/angularjs-toggleclass-example-demo-guide-1.jpg 819w, https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/08\/angularjs-toggleclass-example-demo-guide-1-300x70.jpg 300w, https:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/08\/angularjs-toggleclass-example-demo-guide-1-768x180.jpg 768w\" sizes=\"(max-width: 819px) 100vw, 819px\" \/><\/a><figcaption id=\"caption-attachment-22440\" class=\"wp-caption-text\">Fig. 7: Application Output<\/figcaption><\/figure>\n<p>Developers can click the <code>Toggle<\/code> button to change the font color of a sample text. That\u2019s all for this post. Happy Learning!<\/p>\n<h2>6. Conclusion<\/h2>\n<p>In this section, developers learned how to create a simple angular application to change the font-color of a sample text using the <code>ng-click<\/code> directive. Developers can download the sample application as an Eclipse project in the <a href=\"#projectDownload\">Downloads<\/a> section.<\/p>\n<h2><a name=\"projectDownload\"><\/a>7. Download the Eclipse Project<\/h2>\n<p>This was an example of calling and executing a function to toggle the CSS class using the <code>ng-click<\/code> angular directive in the AngularJS framework.<\/p>\n<div class=\"download\"><strong>Download<\/strong><br \/>\nYou can download the full source code of this example here: <a href=\"http:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/08\/AngularToggleClassNgClass.zip\"><strong>AngularToggleClassNgClick<\/strong><\/a><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Hello readers, in this tutorial, developers will learn what AngularJS is and how to toggle the CSS class using the ng-class and ng-click angular directives. 1. Introduction AngularJS is a JavaScript MVC or Model-View-Controller framework developed by Google that lets developers build well structured, easily testable, and maintainable front-end applications. Before we start with the &hellip;<\/p>\n","protected":false},"author":2162,"featured_media":909,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[25],"tags":[48,520,519,266],"class_list":["post-22403","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-angular-js","tag-angular","tag-angular-1","tag-angular-js","tag-angularjs"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>AngularJS Toggle Class using ng-class Example - Web Code Geeks - 2026<\/title>\n<meta name=\"description\" content=\"Interested to learn more about AngularJS? Then check out our detailed example on AngularJS Toggle Class using ng-class! 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