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 jqxInput is used to represent a jQuery input widget that contains auto-complete features.
The popupZIndex property is used to set or return the auto-suggest popup's z-index. It accepts Number type value and its default value is 20000.
Syntax:
Set the popupZIndex property.
$('selector').jqxInput({ popupZIndex: Number });
Return the popupZIndex property.
var popupZIndex = $('selector').jqxInput('popupZIndex');
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/jqxinput.js"></script>
Example: The below example illustrates the jqxInput popupZIndex property in jQWidgets.
<!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/jqxinput.js">
</script>
</head>
<body class='default'>
<center>
<h1 style="color: green;">
GeeksforGeeks
</h1>
<h3>
jQWidgets jqxInput popupZIndex Property
</h3>
<br>
<label for="css">Enter Text: </label>
<input type="text" id="GFG"/>
</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"
];
$("#GFG").jqxInput({
source: data,
placeHolder: "Enter Subject...",
popupZIndex: 999999
});
});
</script>
</body>
</html>
Output:

Reference: https://www.jqwidgets.com/jquery-widgets-documentation/documentation/jqxinput/jquery-input-api.htm