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jQWidgets jqxQRcode isValid() Method

Last Updated : 22 Sep, 2022
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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 jqxQRcode is in version 14 of jQWidgets and is used to indicate a widget that can display QR codes as well as possesses API in order to approve, export, and also personalize them.

The isValid() method is used to return the validity of the displayed jqxQRcode. It has no parameters.

Syntax:

var isvalid = $('Selector').jqxQRcode("isValid");

Return type: This method returns a boolean value.

Linked Files: Download jQWidgets from the given 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/jqxcore.js”></script>
<script type=”text/javascript” src=”jqwidgets/jqxqrcode.js”> </script>
<script type=”text/javascript” src=”jqwidgets/jqxbuttons.js”> </script>

Example 1: The below example illustrates the jqxQRcode isValid() 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/jqxcore.js">
    </script>
    <script type="text/javascript" 
            src="jqwidgets/jqxqrcode.js">
    </script>
    <script type="text/javascript" 
            src="jqwidgets/jqxbuttons.js">
    </script>
</head>
  
<body>
    <center>
        <h1 style="color:green">
            GeeksforGeeks
        </h1>
  
        <h3>
              jQWidgets jqxQRcode isValid() method 
          </h3>
        <div id="jqxq"></div>
        <input type="button" style="margin:29px;" 
               id="jqxbtn" value="Click here" />
        <div id="log"></div>
    </center>
    <script type="text/javascript">
        $(document).ready(function () {
            $("#jqxq").jqxQRcode({
                value: "code128b",
            });
            $("#jqxbtn").jqxButton({
                width: 280
            });
            $("#jqxbtn").on("click", function () {
                var iv = $('#jqxq').jqxQRcode('isValid');
                $('#log').text(iv);
            });
        });
    </script>
</body>
</html>


Output:

 

Example 2: The following is another example of the jqxQRcode isValid() 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/jqxcore.js">
    </script>
    <script type="text/javascript" 
            src="jqwidgets/jqxqrcode.js">
    </script>
    <script type="text/javascript" 
            src="jqwidgets/jqxbuttons.js">
    </script>
</head>
  
<body>
    <center>
        <h1 style="color:green">
            GeeksforGeeks
        </h1>
  
        <h3>
              jQWidgets jqxQRcode isValid() method
          </h3>
        <div id="jqxq"></div>
        <input type="button" style="margin:29px;" 
               id="jqxbtn" value="Click here" />
        <div id="log"></div>
    </center>
    <script type="text/javascript">
        $(document).ready(function () {
            $("#jqxq").jqxQRcode({
                value: "gfg",
            });
            $("#jqxbtn").jqxButton({
                width: 280
            });
            $("#jqxbtn").on("click", function () {
                var iv = $('#jqxq').jqxQRcode('isValid');
                if (iv === true) {
                    $('#log').text("Valid!");
                }
                else {
                    $('#log').text("Invalid!");
                }
            });
        });
    </script>
</body>
</html>


Output:

 

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



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