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⚡Intermediate
Modern JavaScript: Async, Fetch & APIs
Master asynchronous JavaScript the way real apps use it — callbacks, promises, async/await, and the fetch API for talking to live web services. Every example runs in your browser.
5 modules · 18 lessons · runnable · 18 lessons
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What you'll learn
- Promises
- async / await
- The fetch API
- Working with JSON
Curriculum
5 modules · 18 lessonsModule 1Why asynchronous?3 lessons
JavaScript runs on one threadPreviewCallbacks: the original async
Callback hell
Module 2Promises4 lessons
What a promise isPreviewthen, catch and finally
Chaining promises
Promise.all: doing things in parallel
Module 3async / await3 lessons
async functions and awaitPreviewError handling with try / catch
Sequential vs parallel with await
Module 4Fetch & real APIs4 lessons
The fetch APIPreviewParsing JSON
Handling HTTP errors
Sending data with POST
Module 5Build something real4 lessons
Project: fetch and list data
Project: search-as-you-type
Project: loading & error UX
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