Async & Promiseseasy
What are the key differences between the Fetch API and XMLHttpRequest?
Compare the Fetch API with the older XMLHttpRequest method. Discuss when you would prefer one over the other.
Answer
The Fetch API and XMLHttpRequest have notable differences:
- Promise-based: Fetch uses promises, providing a cleaner, more modern approach to handling asynchronous requests.
- Streamable responses: Fetch can handle streams, enabling more efficient data handling for large responses.
- Simplified syntax: Fetch has a more straightforward syntax, improving code clarity.
- CORS handling: Fetch provides better built-in support for CORS.
- Use XMLHttpRequest: When you need to support legacy browsers or need synchronous requests (typically discouraged).