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There is a JavaScript error in this simplest program, which we need to find, because our code does not work with it and the modal window is not shown. Moreover, in JavaScript, many errors can be called fatal, because they can stop working not only your script, but also third-party JavaScript libraries until the error is fixed.
What can help you find JavaScript errors? Browser console. Here we will briefly walk through this tool in various browsers, notably Firefox and Chrome. Both browsers have a console out of the box.
Let's start with Firefox. In order to see the error in our code, you need to open the browser console. To do this, right-click in the browser window and select Explore Element in the context menu.
A panel will appear at the bottom of the window in which we can examine and debug our code. I suppose if you have typed sites, you may already have used this code inspector to examine the layout. The tool greatly simplifies the life of a layout designer, I can't even imagine how websites were made up without it
So, in the panel that opens, next to the Inspector tab, there is a Console tab, which interests us. Switch to it, refresh the page again and see all JavaScript errors. In our case, this is just one syntax error that occurred in the scripts.js file on the first line.
We just have to go to this file, notice that we forgot to enclose the string in quotes and fix this error:
Now there are no errors and the code has been successfully executed. In addition to the built-in console for Firefox, you can separately install the Firebug extension, which, in fact, is an analogue. After installing Firebug, you can call, like the built-in console, from the context menu or use the F12 hotkey for this. This is how Firebug looks like:
Well, the Chrome console:
It is also called from the context menu or by pressing F12.
Of course, the console is often not needed to fix an error in a single line of code. But if there are tens and hundreds of lines of code, then it is almost impossible to do without a console. At the same time, you can not only view errors in the console, but even write your own JavaScript code, but this is already a topic for a separate article.
This article has come to an end, now you know how to find JavaScript errors in your code and fix them. If you want to learn more about JavaScript, then I recommend turning your attention to the separate one. Good luck!
Good day to everyone who reads the current publication. Today I will try to help you solve the error that appears on the VKontakte social network, which looks like this: "JavaScript error upload is not defined".
I will explain what the error is and what should be done to fix it. In addition, I will offer you several universal solutions not only for this problem, but also for similar errors. Well, let's figure it out!
SOS! A terrible red-colored window with an incomprehensible error!
In fact, this is not such a terrible mistake. It can be solved quite simply.
Unfortunately, in recent years, VK has upset its users with many system failures. And therefore, the latter have to dodge and twist in this situation using different ways of finding solutions.
After numerous meetings with similar errors on a well-known social network, I found three universal solutions that are guaranteed to help out of such situations. But first, let's understand with you what is written in this red box.
"JavaScript error: upload is not defined" Is an error that occurred when trying to download a resource (video, audio file, etc.). If this phrase is translated into Russian, then we get:
There is a contact!
So let's look at the three solutions I mentioned above.
Garbage should be taken out ... or removed
To start . To do this, you need to go to "Tools", find a menu item "Settings" and then find the button "Clear the history".
For a quicker jump to the desired item, just press the keyboard shortcut Ctrl +Shift +Delete... And after selecting the necessary items to delete, click "Clear"... Now try to open VK and start downloading the file. If it didn't work, then go to the next item.
Old is good, new is better!
Your problem may have arisen due to the fact that you have an outdated version of Adobe Flash Player and Java. For troubleshooting, follow the links provided for updating Java (https://www.java.com/ru/download/) and then Flash Player (https://get.adobe.com/en/flashplayer/).
Now repeat the previous steps, i.e. upload the desired VKontakte media file. If there are no changes, then we crawl to the next option.
Let's take the problem seriously!
Now you have to change one configuration file. To do this, open your "Local (system) drive". In it, go to the "Windows" folder, then to the "System32" system folder, then to the "driver (drivers)" directory and finally "etc". Inside it, you will see a file named "hosts". Open it with Notepad and clear all information. Now paste in the attached text below.
I want to highlight an important detail! Since today the majority of computers work with the Microsoft Windows 7, 8 and 10 operating system, I have attached the necessary content specifically for them.
The text itself looks like this:
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | # Copyright (c) 1993-2006 Microsoft Corp. # # This is a sample HOSTS file used by Microsoft TCP / IP for Windows. # # This file contains the mappings of IP addresses to host names. Each # entry should be kept on an individual line. The IP address should # be placed in the first column followed by the corresponding host name. # The IP address and the host name should be separated by at least one # space. # # Additionally, comments (such as these) may be inserted on individual # lines or following the machine name denoted by a "#" symbol. # # For example: # # 102.54.94.97 rhino.acme.com # source server # 38.25.63.10 x.acme.com # x client host # localhost name resolution is handle within DNS itself. # 127.0.0.1 localhost # :: 1 localhost |
# Copyright (c) 1993-2006 Microsoft Corp. # # This is a sample HOSTS file used by Microsoft TCP / IP for Windows. # # This file contains the mappings of IP addresses to host names. Each # entry should be kept on an individual line. The IP address should # be placed in the first column followed by the corresponding host name. # The IP address and the host name should be separated by at least one # space. # # Additionally, comments (such as these) may be inserted on individual # lines or following the machine name denoted by a "#" symbol. # # For example: # # 102.54.94.97 rhino.acme.com # source server # 38.25.63.10 x.acme.com # x client host # localhost name resolution is handle within DNS itself. # 127.0.0.1 localhost # :: 1 localhost
Today "Vkontakte" is the most convenient Russian-language resource, which is not only the largest social network, but also a service for watching videos and listening to audio recordings. Here you can find a huge collection of music audio recordings, films, clips and other stuff.
All registered participants take advantage of all the opportunities provided to them with great pleasure. Recently, more and more complaints from users began to appear about the chips that the system throws out. They all usually boil down to the Java Script Error "Vkontakte". This error interferes with the normal operation of video and audio players.
Java Script Error: An Overview
Such a problem can spoil the mood of those users who were going to while away the time watching a movie or enjoying pleasant music. To prevent this, let's try to figure out how you can fix a JavaScriptError on your own. There are several options for solving this problem. First of all, let's figure out what types of errors can appear.
Error options:
- init Add Media is not defined;
- cannot read property “length” of undefined;
- cannot convert “opt photos” to object;
- cannot read property parent Node.
This is a far from complete list of possible error messages. Only the most common options are listed here. We will consider the existing ways to solve these problems.
Dealing with Java Script Errors
If you cannot turn on audio or open a video file, and a javaScriptError "VKontakte" error message appears in the upper corner of the screen, then first you need to try the following.
- Please use a different browser. So, for example, if you are currently working in Opera, then try installing Google Chrome or Mozilla. Perhaps the problem will go away after that.
- Try using the key combination Ctrl + F5, this action in some cases fixes the error.
- Check your computer using an anti-virus program (Dr. Web or other). You must first update the program.
- Open the "Settings" "Vkontakte" menu from your page and check the box next to the "Always use a secure connection" item. Perhaps this will help fix the problem.
- Clear your browser cache and Java cache.
If none of the above steps helped, and the JavaScript error still prevents you from taking advantage of all the resource's features, then the following workaround might work.
Detecting and removing a virus in the system hosts file
It is possible that viruses that have crept into your computer system are the cause of such an unpleasant incident. They work quite tricky: they create entries in the system hosts file. As a result, access to some sites is blocked. This is where the Java Script Error occurs when trying to use this service. In order to open access, you need to clean the corresponding hosts file. This can be done automatically or manually. In this review, we will look at how you can perform this procedure yourself.
Instructions for cleaning the hosts file
Here are the main steps for cleaning up the Hosts file. Go to "My Computer" and open the Windows / System32 system folder. It contains the Drivers folder. In it you need to find the etc. folder. Among the files that are stored in the last folder, there will be the hosts file we need. Its contents must be opened using Notepad or WordPad. As a result, you will see the contents of this file as a text entry. In a healthy clean file, this entry is limited to the following information 127.0.0.1 localhost. If you see that besides the specified text there are other entries in the file, then this is nothing more than garbage left by viruses. It is this object that prevents programs on the Vkontakte website from functioning normally. He blocks access to them. You need to get rid of unnecessary entries. It is necessary to completely clear the document for better security. Re-enter the required message. After that, we save the changes and close the editor. Now you need to restart your computer. After that, the error should disappear. Try to search your page on a social network and listen to audio files. Then try opening the video. As a result, the Java Script Error should no longer appear. This is the most reliable and at the same time quite simple way. It usually solves a lot of JavaScript error issues. In order to prevent such situations from occurring, it is better to check the operation of your antivirus program. If necessary, you need to update the antivirus or install a new one. Reliable computer protection is the basis of smooth operation when using the worldwide network.
Other types of Java Script errors
In addition to problems with video files and audio recordings, this social network can please the user with a number of other more ridiculous Java Script Error errors. Here is a list of some of the errors and system failures that make it difficult to use a popular resource. If no messages are sent, dialogs do not open, and comments are not attached to photos, an AddEventListener error is thrown. If the wall doesn't work, the wallisnotdefined error appears. This is just a small list of all system jams or failures that can make it difficult to use a popular resource.
Java Script Error: options for solving problems
Regardless of what kind of Java Script error you get, the ways to solve it come down to the same steps. As a rule, it is enough to use one of the options described above. In particular, you should pay attention to reinstalling and changing the Internet browser used, as well as cleaning the hosts file. You should also try resetting your browser settings. After that, you will need to restart the PC again. This simple action in some cases allows you to get rid of the error that occurs. It is also necessary to check the OS for viruses. Perhaps they are hiding somewhere else. To do this, you need to have a powerful anti-virus program.
If everything is in order with your computer, but when you try to use any functions of a popular Internet resource you get a Java Script error, then the reason most likely lies in the service itself. In this case, the simplest solution would be to contact technical support for help. In all likelihood, they will help you to resolve this misunderstanding. The main advice is to take all measures to ensure the security of your computer system. You should use the most recent version of internet browsers and update your antivirus software regularly.
Javascript error mutations are not initialized error? In general, there are plenty of Java-related errors. Moreover, each of them limits the functionality and actions.
For example, when you go to check the messages, it can knock out such an error as “javascript error mutations are not initialized”.
Usually pop out like this in the upper left corner, the inscription in a rectangular light red box.
The problem is that the same notification prevents you from viewing new messages.
Sometimes the question falls away on its own. Everything is decided by itself. But what if the “magic” doesn't work?
Start with the elementary
You can start with the most basic - restart your computer.
This is especially effective if you downloaded some update before, and a restart is required for it to work correctly.
And so far, it somehow affects the work. Of course, this does not help everyone.
Let's consider other methods.
It could be the cache
Your next step will be Java and the browser.
It is possible that errors have arisen in them that directly affect the operation of the VC.
Hold down the Ctrl + F5 combination for a few seconds. The page you are on should reload.
If the problem was related to the cache, then everything should be normalized.
And the words “javascript error mutations are not initialized” won't scare you anymore.
However, the case may be more neglected. Then try clearing the file on your device.
He is a potential target of virus programs. Unfortunately, antiviruses are not able to detect absolutely all viruses, because they are created every day.
So, it is viral activity that can block your access to different sections of the site, in this case, Vkontakte.
Bring the Host file up and running. To do this, go to the etc folder at the following address: C: \ Windows \ System32 \ drivers \ etc. It will also contain the Host.
You can edit it through notepad. But first, right-click on it to run from.
Otherwise, nothing will work, the OS will not allow you to make any changes.
To edit a file means to add additional information to it, such as the type and address of the site. Using the example of Vkontakte, the file should contain the following:
The Host file may not be on your computer. And this is absolutely not fatal - on the contrary, if something is not there, then viruses cannot attack it.
If the Host file is hidden
However, do not rejoice early, check if the file is hidden. Also, the Host may just be in a different location. To find out where he is hiding, you have to go into the registry.
Hold down the Win + R combination or type in the search bar. Navigate to the following directory: HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Services \ Tcpip \ Parameters \.
However, this method is already more serious. Be careful not to delete other important files in the registry.
It can affect the performance of your computer much more than a Java bug. True, you do not need to be immediately afraid to even go into the registry itself.
The main thing is to find the file you need, this is your whole task. You don't need to move, delete, and so on.
Virus?
And this is a real option.
So you can turn on a full computer scan and go for a snack.
If you urgently need to look at the message you received, try logging in via your smartphone or the mobile version of VK.
You could at some point damaged some program files, which is why you are now suffering with the error “javascript error mutations are not initialized”.
It is best to download updates or the program itself through the official website (https://java.com/ru/download/) so as not to pick up viruses somewhere.
By the way, it is better to update and. It can cause similar errors too.
