JavaScript undefined error – How to fix undefined error in JavaScript?


Some PC users tell that when trying to add some codes to the web, they continuously get a JavaScript undefined error. Even though they have used the code for several functions throughout the program, the problem line is still in red. But what really causes this undefined error in JavaScript and how to fix it easily? Maybe the solutions here will show you some easy ways to fix JavaScript undefined error instantly.

fix undefined error in JavaScript

If the JavaScript undefined error shows up when you are the first time adding the code to your site, you have to check and verify whether the Active script, Java applets, or ActiveX is working properly or not. If these processes are blocked or disabled without your permission, undoing the block may fix the problem.

However, if the JavaScript error happens to one or two pages on the same website then it means there is something wrong with this website or this site is broken totally. Website programmers can fix the wrong code according to this error message. However, if you encounter this problem all web pages, there is no doubt to tell that the Java script interpreter on your computer must be broken.

If you continue getting the JavaScript error after the two above steps, you can change your browser from IE to other ones. Compared to Internet Explorer, Firefox for example can detect more errors and run much stable on the computer. Try switching to other browsers; you can also fix the IE JavaScript errors instantly. Here are some popular browsers that you could try: Opera Browser, Google Chrome, Maxthon Browser, Safari Browser, Mozilla Firefox.

Lastly, I highly recommend you to repair related registry files. The undesirable damage on the associated registry files of JavaScript on your computer has the ability to result in JavaScript undefined error and its related problems. The key to totally get rid of JavaScript error is to offer a safe repair to the corrupt registry files. Even if you have been properly trained to use computer, you may have no need to fix the problem manually. This is due to the fact that any errors occur in the repair process seems to result in further severe damage to the system. To safely fix undefined error in JavaScript and repair damaged registry problems, you may consider enabling a trustworthy registry cleaner on the computer. A trustworthy registry cleaner is the best shot for you to perform any repair activities to the Windows registry to help you retrieve a totally error- free PC. It comes with a professional collection of PC maintenance utilities to completely eliminate unneeded registry files and fix registry errors with ease, on purpose to tune up the overall system performance.

So, still troubled with the JavaScript undefined error on your computer and want to run it smoothly all the time? Get the best computer error fix tool here and you will be able to get rid of the undefined error in JavaScript easily.

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Posted by Daisy in Blog JavaScript error on April 8th, 2012 | 2 Comments

2 Responses to JavaScript undefined error – How to fix undefined error in JavaScript?

  1. Author Image
    Rosanna Felix -  April 9, 2012 at 5:32 pm

    i open up firefox and always get this pop up please could u help me out.
    also i uninstalled all java so i dont know why its still doing it :\
    So excellent post here to show me how to do.

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  2. Author Image
    Peters Callie -  April 11, 2012 at 12:03 am

    It’s the same error on every single page and it’s very annoying. It’s ‘JSON’ is undefined. Code: 0 Line: 418. I don’t know whether you solved the problem or not. But I will do as what you say here.

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