Modern JavaScript Async Patterns.md
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cat modern javascript async patterns.md
Modern JavaScript Async Patterns
Exploring the evolution from callbacks to async/await and beyond.
Promise Chains vs Async/Await
// Promise chains
fetchUser(id)
.then(user => fetchPosts(user.id))
.then(posts => renderPosts(posts))
.catch(handleError);
// Async/await
try {
const user = await fetchUser(id);
const posts = await fetchPosts(user.id);
renderPosts(posts);
} catch (error) {
handleError(error);
}
The async/await syntax makes asynchronous code much more readable!