Fixing 'Unable to Get Property Msie' Error on Windows 11

The ' Unable to get property ‘msie’ of undefined or null reference error usually affects web developers and is related to jQuery. However, the problem can be fixed in a matter of moments.

How to Fix "Uncaught TypeError: Cannot read property 'msie' of undefined jQuery"?​

1. Use jQuery Migrate Plugin​

• Download jQuery Migrate Plugin:
  • Go to the official jQuery Migrate plugin page here.
  • Download the plugin file.
• Include jQuery Migrate Plugin:
  • Open your project and locate your HTML file.
  • Add the following script tag to include the jQuery Migrate plugin:<script type="text/javascript" src="code.jquery.com/jquery-migrate-1.2.1.js"></script>

By including the jQuery Migrate plugin, it restores deprecated features and behaviors so that older code will still run properly on newer versions of jQuery.

2. Update jQuery and jQuery UI​

• Update jQuery:
  • Go to the jQuery download page here.
  • Download the latest version of jQuery.
• Update jQuery UI:
  • Go to the jQuery UI download page here.
  • Download the latest version of jQuery UI.
• Include Updated jQuery and jQuery UI:
  • Replace your old jQuery and jQuery UI script references with the newly downloaded files in your HTML:<script src="path/to/your/jquery.js"></script>
    <script src="path/to/your/jquery-ui.js"></script>

Updating jQuery and jQuery UI ensures that you have the latest features and fixes, which can resolve compatibility issues with modern browsers.

3. Use jQuery.browser Plugin​

• Download jQuery.browser Plugin:
  • Go to the official jQuery.browser plugin page.
• Include jQuery.browser Plugin:
  • Add the following script tag to include the jQuery.browser plugin:<script src="path/to/jquery.browser.js"></script>

Using the jQuery.browser plugin restores the $.browser object, allowing the code to correctly identify the browser.

4. Add a Fallback for Undefined Property​

• Modify the Code to Include a Fallback:
  • Locate the code that accesses a.browser.msie.
  • Add a fallback to ensure it doesn’t throw an error:return a.browser && a.browser.msie
    ? (b = Math.max(document.documentElement.scrollWidth, document.body.scrollWidth),
    c = Math.max(document.documentElement.offsetWidth, document.body.offsetWidth),
    b < c ? a(window).width() + "px" : b + "px")
    : a(document).width() + "px";

This modification ensures that the code checks if a.browser is defined before trying to access its msie property, preventing the error.

5. Use Custom Code as a Last Resort​

• Implement Custom Code to Define jQuery.browser:
  • If the above solutions don’t work or aren’t feasible, you can define the jQuery.browser object manually:jQuery.browser = {};
    (function () {
    jQuery.browser.msie = false;
    jQuery.browser.version = 0;
    if (navigator.userAgent.match(/MSIE ([0-9]+)\./)) {
    jQuery.browser.msie = true;
    jQuery.browser.version = RegExp.$1;
    }
    })();

This custom code ensures that the jQuery.browser object is always defined, preventing the error from occurring.

By following these solutions, you can resolve the "Uncaught TypeError: Cannot read property 'msie' of undefined jQuery" error and ensure your code runs smoothly across all browsers.