Async & Promisesmedium

How would you implement robust error handling in asynchronous Fetch API calls?

Discuss methods to handle errors effectively when using the Fetch API in an asynchronous JavaScript environment. Include considerations for network issues and response status codes.

Asked at Google, Apple

#async#fetch-api#error-handling

Answer

To implement robust error handling in Fetch API calls:

  • Use try/catch blocks with async/await for synchronous flow and to catch errors in network requests.
  • Check response status codes to determine success or failure (e.g., check if response.ok is false).
  • Implement retries for transient network errors with exponential backoff.
  • Provide user feedback for errors (e.g., error messages or loading spinners) to enhance user experience.
  • Consider using a centralized error handling function to manage all fetch request errors consistently.

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