TypeErrorTypeError
A value is not of the expected type. This is the most common JavaScript error, occurring when an operation encounters a value of the wrong type.
EPERMThe operation is not permitted, even with appropriate permissions, due to OS-level restrictions.
The operating system blocked the operation regardless of file permissions. This happens when trying to modify system files, when a file is locked by another process, or when SELinux/AppArmor policies restrict the operation.
Check if the file is locked by another process. On Windows, ensure the file is not in use. On Linux, check SELinux/AppArmor policies. Do not bypass OS security; find the proper way to perform the operation.
TypeErrorA value is not of the expected type. This is the most common JavaScript error, occurring when an operation encounters a value of the wrong type.
TypeError: Cannot read properties of undefined/nullAn attempt was made to access a property or method on undefined or null.
TypeError: Cannot set properties of undefined/nullAn attempt was made to set a property on undefined or null.
SyntaxError: Unexpected end of inputThe parser reached the end of the input while still expecting more code, usually due to unclosed brackets or strings.
TypeError: Method called on incompatible receiverA method was called with a 'this' value that is not the expected type.
EMFILEThe process has reached the maximum number of open file descriptors allowed.