0Pricing
TypeScript Academy · Lesson

Error Handling in Async TypeScript Code

Manage async errors with typed wrappers and utilities.

Welcome

Async functions add complexity to error handling. TypeScript ensures you handle Promise rejections properly.

Async/Await Try-Catch

Wrap await calls in try-catch to handle Promise rejections.
async function loadUser(id: number): Promise<User> {
  try {
    return await api.getUser(id);
  } catch (err: unknown) {
    if (err instanceof Error) throw new AppError(err.message);
    throw new AppError('Unknown error');
  }
}

All lessons in this course

  1. Typed Error Classes and Hierarchies
  2. The Result Pattern: Ok and Err
  3. Narrowing Caught Errors (unknown vs Error)
  4. Error Handling in Async TypeScript Code
← Back to TypeScript Academy