jQWidgets jqxComboBox checkIndex() Method

Last Updated : 05 Aug, 2021

jQWidgets is a JavaScript framework for making web-based applications for PC and mobile devices. It is a very powerful and optimized framework, platform-independent, and widely supported. The jqxComboBox is used to represent a jQuery combobox widget that contains an input field with auto-complete functionality and a list of selectable items displayed in a drop-down.

The checkIndex() method is used to check the jqxComboBox list items when ‘checkboxes’ property is true. This method is works with ‘checkboxes’ property. It accepts single parameter index of Number type and it does not return any value.

Syntax:

$('selector').jqxComboBox('checkIndex', 'index' );

Linked Files: Download jQWidgets from https://www.jqwidgets.com/download/ 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/jqxcolorpicker.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>
<script type=”text/javascript” src=”jqwidgets/jqxcombobox.js”></script>

The below example illustrates the jqxComboBox checkIndex() method in jQWidgets:

Example:

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/jqxcolorpicker.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> 
    <script type="text/javascript" 
            src="jqwidgets/jqxcombobox.js"> 
    </script> 
</head> 
  
  
<body> 
    <center> 
        <h1 style="color: green;"> 
            GeeksforGeeks 
        </h1> 
  
        <h3> 
            jQWidgets jqxComboBox checkIndex() Method 
        </h3> 
  
        <div id='jqxCB'></div> 
        <br> 
        <input type="button" id='jqxBtn' 
            style="padding: 5px 20px;"
            value="Check the List Item" /> 
    </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" 
            ]; 
  
            $("#jqxCB").jqxComboBox({ 
                source: data, 
                width: '250px', 
                animationType: 'slide', 
                checkboxes: true 
            }); 
  
            $('#jqxBtn').on('click', function () { 
                $("#jqxCB").jqxComboBox('checkIndex', 2); 
            }); 
        }); 
    </script> 
</body> 
  
</html>