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jQWidgets jqxListBox checkIndex() Method

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  • Last Updated : 14 Sep, 2021

jQWidgets is a JavaScript framework for making web-based applications for PC and mobile devices. It is a very powerful, optimized, platform-independent, and widely supported framework. The jqxListBox is used to illustrate a jQuery ListBox widget which comprises a list of electable elements.

The checkIndex() method is used to check an item in the stated list when the checkboxes property value is set to true. Moreover, the index is based on zero, in other words, in order to check an initial item, the checkIndex method must be invoked along with parameter zero. It does not return any thing.

Syntax:

$("#jqxListBox").jqxListBox('checkIndex', index); 

Parameter:

  • Index: The stated index of type number. The indexing starts with 0.

 

Linked Files: Download jQWidgets from the link. In the HTML file, locate the script files in the downloaded folder.

<link rel=”stylesheet” href=”jqwidgets/styles/jqx.base.css” type=”text/css” />
<script type=”text/javascript” src=”scripts/jquery-1.11.1.min.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqx-all.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxcore.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxbuttons.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxscrollbar.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxlistbox.js”></script>

Example: The below example illustrates the jqxListBox checkIndex() method in jQWidgets.

HTML




<!DOCTYPE html>
<html lang="en">
    <head>
        <link rel="stylesheet" href=
            "jqwidgets/styles/jqx.base.css" type="text/css" />
        <script type="text/javascript" 
            src="scripts/jquery-1.11.1.min.js"></script>
        <script type="text/javascript" 
            src="jqwidgets/jqx-all.js"></script>
        <script type="text/javascript" 
            src="jqwidgets/jqxcore.js"></script>
        <script type="text/javascript" 
            src=".jqwidgets/jqxbuttons.js"></script>
        <script type="text/javascript" 
            src="jqwidgets/jqxscrollbar.js"></script>
        <script type="text/javascript" 
            src="jqwidgets/jqxlistbox.js"></script>
    </head>
  
    <body>
        <center>
            <h1 style="color: green;">
                GeeksforGeeks
            </h1>
  
            <h3>
                jQWidgets jqxListBox checkIndex() Method
            </h3>
  
            <div id="jqxLB"></div>
            <br />
            <input type="button" id="jqxBtn" 
                style="padding: 5px 20px;" 
                value="check Index" />
        </center>
        
        <script type="text/javascript">
            $(document).ready(function () {
                var data = [
                  "Computer Science", 
                  "C Programming",
                  "C++ Programming",
                  "Java Programming",
                  "Python Programming", 
                  "HTML", 
                  "CSS", 
                  "JavaScript", 
                  "jQuery",
                  "PHP", 
                  "Bootstrap"];
  
                $("#jqxLB").jqxListBox({
                    source: data,
                    width: "200px",
                    height: "80px",
                    checkboxes:true
                });
  
                $("#jqxBtn").on("click", function () {
                    $("#jqxLB").jqxListBox("checkIndex", 1);
                });
            });
        </script>
    </body>
</html>


Output:

checkIndex() method

Reference: https://www.jqwidgets.com/jquery-widgets-documentation/documentation/jqxlistbox/jquery-listbox-api.htm?search=


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