\n[ulp id=’qGGDqWnle19VavkM’]<\/p>\n
1.1 Why jQuery?<\/h3>\n\n- It helps in improving the application performance and increasing the developer\u2019s productivity<\/li>\n
- It helps in developing the browser compatible web-page<\/li>\n
- It helps in implementing the UI related critical functionality without writing the several lines of codes<\/li>\n
- It is fast and extensible i.e. developers can use the jQuery library to implement the customized behavior<\/li>\n
- It is simpler and easy to learn<\/li>\n<\/ul>\n
1.2 jQuery children() Function<\/h3>\n
The jQuery children()<\/code> function is an inbuilt function that returns all the direct children of the selected HTML element. This method only<\/em> traverses a single level down the DOM tree and doesn\u2019t return the text nodes. Here is the simple syntax to use this method.<\/p>\nSnippet<\/em><\/span><\/p>\n$(selector).children([ filter ])\r\n<\/pre>\nDo note, the filter<\/code> is an optional argument that narrows down the search for the children. If not supplied, then all the children\u2019s are selected. These new APIs make a developer 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 jQuery library.<\/p>\n2. jQuery children() Example<\/h2>\n
Here is a step-by-step guide for implementing this tutorial using the jQuery library.<\/p>\n
2.1 Tools Used<\/h3>\n
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
2.2 Project Structure<\/h3>\n
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![\"jQuery](\"http:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/09\/jQuery_children_project_structure-guide_1.jpg\")
<\/a>Fig. 1: Application Project Structure<\/figcaption><\/figure>\n2.3 Project Creation<\/h3>\n
This section will show on how to create a Java-based Maven project with Eclipse. In Eclipse Ide, go to File -> New -> Maven Project<\/code>.<\/p>\n![\"jQuery](\"http:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/09\/jQuery_children_project_guide_1.jpg\")
<\/a>Fig. 2: Create a Maven Project<\/figcaption><\/figure>\nIn the New Maven Project window, it will ask you to select project location. By default, ‘Use default workspace location’ will be selected. Just click on next button to proceed.<\/p>\n![\"jQuery](\"http:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/09\/jQuery_children_project_guide_2.jpg\")
<\/a>Fig. 3: Project Details<\/figcaption><\/figure>\nSelect the ‘Maven Web App’ Archetype from the list of options and click next.<\/p>\n![\"jQuery](\"http:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/09\/jQuery_children_project_guide_3.jpg\")
<\/a>Fig. 4: Archetype Selection<\/figcaption><\/figure>\nIt will ask you to ‘Enter the group and the artifact id for the project’. We will input the details as shown in the below image. The version number will be by default: 0.0.1-SNAPSHOT<\/code>.<\/p>\n![\"jQuery](\"http:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/09\/jQuery_children_project_guide_4.jpg\")
<\/a>Fig. 5: Archetype Parameters<\/figcaption><\/figure>\nClick on Finish and the creation of a maven project is completed. If you see, it has downloaded the maven dependencies and a pom.xml<\/code> file will be created. It will have the following code:<\/p>\npom.xml<\/em><\/span><\/p>\n<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\">\r\n\t<modelVersion>4.0.0<\/modelVersion>\r\n\t<groupId>com.jquery<\/groupId>\r\n\t<artifactId>jQueryChildern<\/artifactId>\r\n\t<version>0.0.1-SNAPSHOT<\/version>\r\n\t<packaging>war<\/packaging>\r\n<\/project>\r\n<\/pre>\nLet\u2019s start building the application!<\/p>\n
3. Application Building<\/h2>\n
Let\u2019s create an application to understand the basic building blocks of this tutorial.<\/p>\n
3.1 Load the jQuery Library<\/h3>\n
Since it is a pure JavaScript framework, so developers should add its reference using the <script><\/code> tag.<\/p>\n<script type=\"text\/javascript\" src=\"resource\/js\/jquery-3.3.1.min.js\"><\/script>\r\n<\/pre>\nDevelopers can either download the jQuery from the official website and the application will then directly load the jQuery library from the local drive or they can also include the direct CDN link under the script<\/code> tag.<\/p>\n3.2 Define the Application<\/h3>\n
Next, we will define the sample application using the HTML tags.<\/p>\n
<ul id=\"children\" class=\"list-group\">\r\n\t<li id=\"count1\" class=\"list-group-item\"><span id=\"tech_name\">JavaScript<\/span><\/li>\r\n\t<li id=\"count2\" class=\"list-group-item\"><span id=\"tech_name\">jQuery<\/span><\/li>\r\n\t<li id=\"count3\" class=\"list-group-item\"><span id=\"tech_name\">AngularJs<\/span><\/li>\r\n\t<li id=\"count4\" class=\"list-group-item\"><span id=\"tech_name\">HTML\/CSS<\/span><\/li>\r\n\t<li id=\"count5\" class=\"list-group-item\"><span id=\"tech_name\">NodeJs<\/span><\/li>\r\n<\/ul>\r\n<div>\u00a0<\/div>\r\n\r\n<button id=\"btn\" type=\"submit\" class=\"btn btn-info\">Click<\/button>\r\n<\/pre>\n3.3 Define a jQuery Function<\/h3>\n
In this step, we\u2019ll demonstrate the jQuery children()<\/code> function. This function would apply the red color to all the direct children of the <li><\/code> tag. Here $()<\/code> is the default syntax for the jQuery function and is used to define the jQuery part. $(document).ready<\/code> method gets called when the document is loaded.<\/p>\n$(document).ready(function() {\t\t \r\n\t$('#btn').click(function() {\r\n\t\t$(\"li\").children().css({\"color\": \"red\"});\r\n\t});\r\n});\r\n<\/pre>\n3.4 First jQuery Application<\/h3>\n
Complete all the above steps and save the file. Let\u2019s see the sample code snippet.<\/p>\n
index.jsp<\/em><\/span><\/p>\n<%@ page language=\"java\" contentType=\"text\/html; charset=ISO-8859-1\" pageEncoding=\"ISO-8859-1\" %>\r\n<!DOCTYPE html PUBLIC \"-\/\/W3C\/\/DTD HTML 4.01 Transitional\/\/EN\" \"http:\/\/www.w3.org\/TR\/html4\/loose.dtd\">\r\n<html>\r\n\t<head>\r\n\t\t<title>IndexPage<\/title>\r\n\t <meta http-equiv=\"Content-Type\" content=\"text\/html; charset=ISO-8859-1\">\r\n\t \t \r\n\t <link rel=\"stylesheet\" href=\"https:\/\/maxcdn.bootstrapcdn.com\/bootstrap\/4.1.3\/css\/bootstrap.min.css\">\r\n\t \r\n\t <script type=\"text\/javascript\" src=\"resource\/js\/jquery-3.3.1.min.js\"><\/script>\t \r\n\t <script type=\"text\/javascript\">\t \r\n\t $(document).ready(function() {\t\t \r\n\t\t $('#btn').click(function() {\r\n\t\t \t$(\"li\").children().css({\"color\": \"red\"});\r\n\t\t });\r\n\t });\r\n\t <\/script>\r\n\t<\/head>\r\n\t<body>\r\n\t <div class=\"container\">\r\n\t \t<h2 align=\"center\" class=\"text-primary\">jQuery children() Example<\/h2><hr \/>\r\n\t \t<div><\/div>\r\n\t \t\r\n\t \t<!------ jQuery children() Example ------>\r\n\t \t<ul id=\"children\" class=\"list-group\">\r\n\t <li id=\"count1\" class=\"list-group-item\"><span id=\"tech_name\">JavaScript<\/span><\/li>\r\n\t <li id=\"count2\" class=\"list-group-item\"><span id=\"tech_name\">jQuery<\/span><\/li>\r\n\t <li id=\"count3\" class=\"list-group-item\"><span id=\"tech_name\">AngularJs<\/span><\/li>\r\n\t <li id=\"count4\" class=\"list-group-item\"><span id=\"tech_name\">HTML\/CSS<\/span><\/li>\r\n\t <li id=\"count5\" class=\"list-group-item\"><span id=\"tech_name\">NodeJs<\/span><\/li>\r\n\t <\/ul>\r\n\t <div>\u00a0<\/div>\r\n\r\n\t <button id=\"btn\" type=\"submit\" class=\"btn btn-info\">Click<\/button>\r\n\t <\/div>\r\n\t<\/body>\r\n<\/html>\r\n<\/pre>\n4. Run the Application<\/h2>\n
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 Run as -> Run on Server<\/code>.<\/p>\n![\"jQuery](\"http:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/09\/jQuery_children_project_deploy-guide_1.jpg\")
<\/a>Fig. 6: How to Deploy Application on Tomcat<\/figcaption><\/figure>\nTomcat 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
5. Project Demo<\/h2>\n
Open your favorite browser and hit the following URL to display the application\u2019s output page.<\/p>\n
http:\/\/localhost:8082\/jQueryChildern\/<\/pre>\nServer name (localhost) and port (8082) may vary as per your Tomcat configuration.<\/p>\n![\"jQuery](\"http:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/09\/jQuery_children_project_demo_guide_1.jpg\")
<\/a>Fig. 7: Output page<\/figcaption><\/figure>\nUsers can click the Click<\/code> button that will select the direct children\u2019s of the <li><\/code> tag and would apply the red font color as shown in Fig. 8.<\/p>\n![\"jQuery](\"http:\/\/www.webcodegeeks.com\/wp-content\/uploads\/2018\/09\/jQuery_children_project_demo_guide_2.jpg\")
<\/a>Fig. 8: jQuery ‘Children’ function<\/figcaption><\/figure>\nThat\u2019s all for this tutorial and I hope the article served you whatever you were looking for. Happy Learning and don\u2019t forget to share!<\/p>\n
6. Conclusion<\/h2>\n
In this section, developers learned how to create a simple application with the jQuery library. Developers can download the sample application as an Eclipse project in the Downloads<\/a> section.<\/p>\n<\/a>7. Download the Eclipse Project<\/h2>\nThis was an example of jQuery children()<\/code> function for the beginners.<\/p>\n
1.2 jQuery children() Function<\/h3>\n
The jQuery Snippet<\/em><\/span><\/p>\n Do note, the Here is a step-by-step guide for implementing this tutorial using the jQuery library.<\/p>\n 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 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 This section will show on how to create a Java-based Maven project with Eclipse. In Eclipse Ide, go to In the New Maven Project window, it will ask you to select project location. By default, ‘Use default workspace location’ will be selected. Just click on next button to proceed.<\/p>\n Select the ‘Maven Web App’ Archetype from the list of options and click next.<\/p>\n It will ask you to ‘Enter the group and the artifact id for the project’. We will input the details as shown in the below image. The version number will be by default: Click on Finish and the creation of a maven project is completed. If you see, it has downloaded the maven dependencies and a pom.xml<\/em><\/span><\/p>\n Let\u2019s start building the application!<\/p>\n Let\u2019s create an application to understand the basic building blocks of this tutorial.<\/p>\n Since it is a pure JavaScript framework, so developers should add its reference using the Developers can either download the jQuery from the official website and the application will then directly load the jQuery library from the local drive or they can also include the direct CDN link under the Next, we will define the sample application using the HTML tags.<\/p>\n In this step, we\u2019ll demonstrate the jQuery Complete all the above steps and save the file. Let\u2019s see the sample code snippet.<\/p>\n index.jsp<\/em><\/span><\/p>\n 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 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 Open your favorite browser and hit the following URL to display the application\u2019s output page.<\/p>\n Server name (localhost) and port (8082) may vary as per your Tomcat configuration.<\/p>\n Users can click the That\u2019s all for this tutorial and I hope the article served you whatever you were looking for. Happy Learning and don\u2019t forget to share!<\/p>\n In this section, developers learned how to create a simple application with the jQuery library. Developers can download the sample application as an Eclipse project in the Downloads<\/a> section.<\/p>\n This was an example of jQuery children()<\/code> function is an inbuilt function that returns all the direct children of the selected HTML element. This method only<\/em> traverses a single level down the DOM tree and doesn\u2019t return the text nodes. Here is the simple syntax to use this method.<\/p>\n$(selector).children([ filter ])\r\n<\/pre>\n
filter<\/code> is an optional argument that narrows down the search for the children. If not supplied, then all the children\u2019s are selected. These new APIs make a developer 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 jQuery library.<\/p>\n2. jQuery children() Example<\/h2>\n
2.1 Tools Used<\/h3>\n
2.2 Project Structure<\/h3>\n
<\/a>2.3 Project Creation<\/h3>\n
File -> New -> Maven Project<\/code>.<\/p>\n<\/a><\/a><\/a>0.0.1-SNAPSHOT<\/code>.<\/p>\n<\/a>pom.xml<\/code> file will be created. It will have the following code:<\/p>\n<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\">\r\n\t<modelVersion>4.0.0<\/modelVersion>\r\n\t<groupId>com.jquery<\/groupId>\r\n\t<artifactId>jQueryChildern<\/artifactId>\r\n\t<version>0.0.1-SNAPSHOT<\/version>\r\n\t<packaging>war<\/packaging>\r\n<\/project>\r\n<\/pre>\n
3. Application Building<\/h2>\n
3.1 Load the jQuery Library<\/h3>\n
<script><\/code> tag.<\/p>\n<script type=\"text\/javascript\" src=\"resource\/js\/jquery-3.3.1.min.js\"><\/script>\r\n<\/pre>\n
script<\/code> tag.<\/p>\n3.2 Define the Application<\/h3>\n
<ul id=\"children\" class=\"list-group\">\r\n\t<li id=\"count1\" class=\"list-group-item\"><span id=\"tech_name\">JavaScript<\/span><\/li>\r\n\t<li id=\"count2\" class=\"list-group-item\"><span id=\"tech_name\">jQuery<\/span><\/li>\r\n\t<li id=\"count3\" class=\"list-group-item\"><span id=\"tech_name\">AngularJs<\/span><\/li>\r\n\t<li id=\"count4\" class=\"list-group-item\"><span id=\"tech_name\">HTML\/CSS<\/span><\/li>\r\n\t<li id=\"count5\" class=\"list-group-item\"><span id=\"tech_name\">NodeJs<\/span><\/li>\r\n<\/ul>\r\n<div>\u00a0<\/div>\r\n\r\n<button id=\"btn\" type=\"submit\" class=\"btn btn-info\">Click<\/button>\r\n<\/pre>\n
3.3 Define a jQuery Function<\/h3>\n
children()<\/code> function. This function would apply the red color to all the direct children of the <li><\/code> tag. Here $()<\/code> is the default syntax for the jQuery function and is used to define the jQuery part. $(document).ready<\/code> method gets called when the document is loaded.<\/p>\n$(document).ready(function() {\t\t \r\n\t$('#btn').click(function() {\r\n\t\t$(\"li\").children().css({\"color\": \"red\"});\r\n\t});\r\n});\r\n<\/pre>\n3.4 First jQuery Application<\/h3>\n
<%@ page language=\"java\" contentType=\"text\/html; charset=ISO-8859-1\" pageEncoding=\"ISO-8859-1\" %>\r\n<!DOCTYPE html PUBLIC \"-\/\/W3C\/\/DTD HTML 4.01 Transitional\/\/EN\" \"http:\/\/www.w3.org\/TR\/html4\/loose.dtd\">\r\n<html>\r\n\t<head>\r\n\t\t<title>IndexPage<\/title>\r\n\t <meta http-equiv=\"Content-Type\" content=\"text\/html; charset=ISO-8859-1\">\r\n\t \t \r\n\t <link rel=\"stylesheet\" href=\"https:\/\/maxcdn.bootstrapcdn.com\/bootstrap\/4.1.3\/css\/bootstrap.min.css\">\r\n\t \r\n\t <script type=\"text\/javascript\" src=\"resource\/js\/jquery-3.3.1.min.js\"><\/script>\t \r\n\t <script type=\"text\/javascript\">\t \r\n\t $(document).ready(function() {\t\t \r\n\t\t $('#btn').click(function() {\r\n\t\t \t$(\"li\").children().css({\"color\": \"red\"});\r\n\t\t });\r\n\t });\r\n\t <\/script>\r\n\t<\/head>\r\n\t<body>\r\n\t <div class=\"container\">\r\n\t \t<h2 align=\"center\" class=\"text-primary\">jQuery children() Example<\/h2><hr \/>\r\n\t \t<div><\/div>\r\n\t \t\r\n\t \t<!------ jQuery children() Example ------>\r\n\t \t<ul id=\"children\" class=\"list-group\">\r\n\t <li id=\"count1\" class=\"list-group-item\"><span id=\"tech_name\">JavaScript<\/span><\/li>\r\n\t <li id=\"count2\" class=\"list-group-item\"><span id=\"tech_name\">jQuery<\/span><\/li>\r\n\t <li id=\"count3\" class=\"list-group-item\"><span id=\"tech_name\">AngularJs<\/span><\/li>\r\n\t <li id=\"count4\" class=\"list-group-item\"><span id=\"tech_name\">HTML\/CSS<\/span><\/li>\r\n\t <li id=\"count5\" class=\"list-group-item\"><span id=\"tech_name\">NodeJs<\/span><\/li>\r\n\t <\/ul>\r\n\t <div>\u00a0<\/div>\r\n\r\n\t <button id=\"btn\" type=\"submit\" class=\"btn btn-info\">Click<\/button>\r\n\t <\/div>\r\n\t<\/body>\r\n<\/html>\r\n<\/pre>\n4. Run the Application<\/h2>\n
Run as -> Run on Server<\/code>.<\/p>\n<\/a>5. Project Demo<\/h2>\n
http:\/\/localhost:8082\/jQueryChildern\/<\/pre>\n
<\/a>Click<\/code> button that will select the direct children\u2019s of the <li><\/code> tag and would apply the red font color as shown in Fig. 8.<\/p>\n<\/a>6. Conclusion<\/h2>\n
<\/a>7. Download the Eclipse Project<\/h2>\n
children()<\/code> function for the beginners.<\/p>\n