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JS .then()
Handle asynchronous success like a pro.
async_logic.js
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Tutor: The .then() method is used to schedule a callback to run when a Promise is resolved. It's the primary way we handle asynchronous data in JavaScript.
Concept: What is .then()?
The .then() method takes up to two arguments: callback functions for the success and failure cases of the Promise. It immediately returns a new Promise object, allowing you to chain operations.
- ✅ Fulfilled: Runs the first callback.
- ❌ Rejected: Skips to the next
.catch()or runs the second callback.
Mission: Resolve It
A.D.A. Analysis:
> Awaiting code...The .then() Glossary
Callback
The function passed into .then() that receives the result.
Chaining
Returning a value in .then() to pass it to the next .then() in line.
Asynchronous
Code that doesn't block the main thread while waiting for data.