How to Fix “Uncaught TypeError: Cannot read property ‘msie’ of undefined jQuery”

Uncaught TypeError

Are you tearing your hair out over the pesky “Uncaught TypeError: Cannot read property ‘msie’ of undefined jQuery” error showing up in your console? It’s like an uninvited guest at a dinner party, but worry not – we’re here to help you get rid of it for good.

This error often rears its ugly head when jQuery attempts to access the browser object, but it’s nowhere to be found. This can be the case in certain versions of jQuery. Luckily, we’ve got a simple and elegant code snippet to exorcise this error from your console.

// Fixed: Uncaught TypeError: Cannot read property 'msie' of undefined jQuery
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 magic piece of code conjures up an empty browser object and defines two crucial properties – msie and version. It then scans the user agent string for the telltale “MSIE” followed by a version number. When it finds this sneaky combo, it sets the msie property to true and the version property to the captured version number.

By summoning the browser object into existence, we sidestep the error that materializes when jQuery tries to access a phantom object property. With this powerful fix, the error will vanish from your console like a ghost at sunrise.

It’s important to note that this fix is designed for older versions of jQuery that still cling to the browser object. In the latest and greatest jQuery versions, the browser object has been laid to rest, so this error shouldn’t haunt you.

Now you’re armed with the knowledge to banish the “Uncaught TypeError: Cannot read property ‘msie’ of undefined jQuery” error in just a few lines of code.

Enjoy your newfound serenity, and happy coding!

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