AkousaJavaScript ErrorsError
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.
browsernode
View details SyntaxError: Unexpected tokenThe parser encountered a token (character or keyword) that was not expected at that position in the code.
A character or keyword appeared where the parser did not expect it. Common causes include missing commas in arrays/objects, extra/missing brackets, using reserved words as identifiers, or ES module syntax in CommonJS files.
Check the line indicated in the error for missing or extra punctuation. Verify brackets and parentheses are balanced. Ensure you are not mixing module systems. Use a code formatter to catch structural issues.
const obj = { name: 'test', }; // trailing comma in older JSTypeErrorA 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.
ReferenceErrorA reference was made to a variable that does not exist in the current scope.
ERR_SERVER_ALREADY_LISTENThe server.listen() method was called when the server is already listening.
ERR_INVALID_RETURN_VALUEA function returned a value of an unexpected type.
ERR_INSPECTOR_ALREADY_ACTIVATEDThe Node.js inspector (debugger) was activated more than once.
TypeError: Cannot set properties of undefined/nullAn attempt was made to set a property on undefined or null.