jQWidgets jqxDropDownList ensureVisible() Method

Last Updated : 08 Sep, 2021

Introduction: 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 jqxDropDownList widget is a jQuery drop-down list that contains a list of selectable items displayed in the drop-down list.

The ensureVisible() method is used to ensure that an item is visible. It accepts single parameter index of Number type and does not return any value. The indexing starts with 0.

Syntax:

$("Selector").jqxDropDownList('ensureVisible', index );

Linked Files: Download jQWidgets from the link https://www.jqwidgets.com/download/. In the HTML file, locate the script files in the downloaded folder.

<link rel=”stylesheet” href=”jqwidgets/styles/jqx.base.css” type=”text/css” />
<link rel=”stylesheet” href=”jqwidgets/styles/jqx.energyblue.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>
<script type=”text/javascript” src=”jqwidgets/jqxdropdownlist.js”></script>

The below example illustrates the jqxDropDownList ensureVisible() method in jQWidgets.

Example:

HTML

<!DOCTYPE html> 
<html lang="en"> 
  
<head> 
    <link rel="stylesheet" href= 
        "jqwidgets/styles/jqx.base.css" type="text/css" /> 
    <link rel="stylesheet" href= 
        "jqwidgets/styles/jqx.energyblue.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> 
    <script type="text/javascript" 
        src="jqwidgets/jqxdropdownlist.js"></script> 
</head> 
  
<body> 
    <center> 
        <h1 style="color: green;"> 
            GeeksforGeeks 
        </h1> 
  
        <h3> 
            jQWidgets jqxDropDownList ensureVisible() Method 
        </h3> 
  
        <div id='jqxDDL'></div> 
  
        <input id="jqxBtn" type="button" 
            value="Ensure Visible Item" 
            style="padding: 5px 15px; margin-top: 50px;"> 
    </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" 
            ]; 
  
            $("#jqxDDL").jqxDropDownList({ 
                source: data, 
                theme: 'energyblue', 
                selectedIndex: 0 
            }); 
  
            $("#jqxBtn").on('click', function() { 
                $("#jqxDDL").jqxDropDownList('open'); 
                $("#jqxDDL").jqxDropDownList('ensureVisible',  
                    data.length - 1); 
            }); 
        }); 
    </script> 
</body> 
  
</html