Write asynchronous code in a breeze with async and await

Write asynchronous code in a breeze with async and await

Writing asynchronous code is very common these days. Callback structured code can be difficult to read, write and maintain. Promises were a step forward. async and await makes writing.

Writing asynchronous code is very common these days. Callback structured code can be difficult to read, write and maintain. Promises were a step forward. async and await makes writing (and reading) asynchronous code a breeze!

async and await

In this post we are going to explore some sample asynchronous code using async and await in TypeScript.

Asynchronous Functions

Asynchronous code that calls a web service is pretty common these days. So, let’s create an asynchronous function that calls a web service to get some data using async and await.

There are 3 main points of note in our function:

  • Our function contains a call to the fetch function. The await keyword allows fetch to be called in an asynchronous manner with the execution of the next line blocked until fetch returns
  • Our function is prefixed with the async keyword because we are referencing the await keyword and executing asynchronous code within our function. The async keyword allows our function to be called in an asynchronous manner with await
  • Our async function needs to return a Promise

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