Deleting the Discord data folders is the most common fix for Discord JavaScript errors when trying to start up the application.

If you are unable to see the AppData folder, you may need to turn on the option that enables you to view hidden files and folders. Delete the app folder in the AppData folder. Next, press the ...

Troubleshooting Discord fatal javascript error in Windows 10 Performing the following procedures will help eliminate every possible trigger and eventually fix the fatal javascript error in Discord.