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!
In this post we are going to explore some sample asynchronous code using async
and await
in TypeScript.
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:
fetch
function. The await
keyword allows fetch
to be called in an asynchronous manner with the execution of the next line blocked until fetch
returnsasync
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
async
function needs to return a Promise
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