Errors
Built-in error types and what triggers them.
- ReferenceErrorThrown when code refers to a binding that doesn't exist — the code was valid JavaScript, but the name it looked for wasn't there when it ran.
- SyntaxErrorThrown when code isn't valid JavaScript at all — the engine refuses to run any of the file, not just the broken line.
- TypeErrorThrown when an operation is attempted on a value that doesn't support it — reading a property of null, calling something that isn't a function.