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What is promise chaining in JavaScript?

An example of an AI chatbot conversation about promise chaining in JavaScript.

😀
You

What is promise chaining in JavaScript?

MagicBuddy
MagicBuddy

Promise chaining is a technique in JavaScript that allows you to execute asynchronous operations in sequence. Instead of nesting callbacks, you can return a promise from a function and use .then() to handle the result.

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You

Can you give me an example of promise chaining?

MagicBuddy
MagicBuddy

Sure! Here's a simple example:

fetch('https://api.example.com/data')
  .then(response => response.json())
  .then(data => console.log(data))
  .catch(error => console.error('Error:', error));

In this example, the second .then() waits for the first promise to resolve before executing.

😀
You

What happens if one of the promises fails?

MagicBuddy
MagicBuddy

If a promise in the chain fails, the control jumps to the nearest .catch() block. This allows you to handle errors gracefully.

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You

Is promise chaining better than using async/await?

MagicBuddy
MagicBuddy

Both promise chaining and async/await have their advantages. Promise chaining can be more readable for simple sequences, while async/await can make complex asynchronous code easier to understand.

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