Basics
TS Errors
Handling TypeScript Errors
TypeScript errors use try-catch with typed error handling.
Understanding TypeScript Errors
TypeScript, a superset of JavaScript, adds static typing to your code, which helps catch errors during compile time. However, runtime errors can still occur, which is where try-catch blocks come into play. In TypeScript, you can enhance error handling by adding types to your error objects, making your code more robust and maintainable.
Basic Try-Catch Syntax in TypeScript
The try-catch construct is used to handle exceptions in TypeScript. The try block contains code that might throw an error, while the catch block handles the error. Here is a simple example:
Typing Errors in Catch Blocks
Unlike JavaScript, TypeScript allows you to specify the type of the error parameter in the catch block. This is especially useful for ensuring that the error handling code correctly understands the structure of the error object.
Using Custom Error Types
Defining custom error types can provide more clarity in error handling. You can create custom error classes that extend the built-in Error class.
Best Practices for Error Handling in TypeScript
Here are some best practices to follow when handling errors in TypeScript:
- Always type your errors as
unknowninitially and narrow down using type guards. - Create custom error classes to provide detailed context about the error.
- Log errors to a centralized logging system for easier debugging and auditing.
- Avoid using
anyas it defeats the purpose of TypeScript's type system.
