Converting to Async Await

Lecture 336:- Converting to Async Await

Converting a codebase to use async/await involves replacing the use of callbacks and .then() methods with async/await syntax.

Here's an example of how to convert a callback function to an async/await function:

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// Callback function function getData(callback) {  setTimeout(() => {    callback('data')  }, 1000) } // Converting to async/await function getDataAsync() {  return new Promise((resolve, reject) => {    setTimeout(() => {      resolve('data')    }, 1000)  }) } async function fetchData() {  const data = await getDataAsync()  console.log(data) }

In this example, the getData function uses a callback to pass data back to the caller. To convert it to an async/await function, we can wrap it in a Promise and use the resolve function to pass the data back. Then we can use the await keyword to wait for the Promise to resolve before returning the data.

To use async/await with a function that returns a Promise, we can simply use the await keyword before the Promise and assign the result to a variable. The function must also be marked with the async keyword.

It's important to note that async/await does not replace Promises, but instead provides a more readable way to work with them.