Guide: The Error Object in JS

Error handling is not just about preventing the app from crashing, it's about providing useful information to fix it.

Common Error Types

• SyntaxError: Error in code syntax.
• ReferenceError: Trying to use a variable that does not exist.
• TypeError: An operation is performed on a wrong data type (e.g., null.f()).

Throwing errors

You can force an error using the throw keyword:

if (!user) {
  throw new Error("User not found");
}