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NodeJS Async Await

Comparison between Promises and Async/Await

Function using promises:

function myAsyncFunction() {
 return aFunctionThatReturnsAPromise()
 // doSomething is a sync function
 .then(result => doSomething(result))

So here is when Async/Await enter in action in order to get cleaner our function:

async function myAsyncFunction() {
 let result;
 try {
 result = await aFunctionThatReturnsAPromise();
 } catch (error) {
 // doSomething is a sync function
 return doSomething(result);

So the keyword async would be similar to write return new Promise((resolve, reject) => {...}.

And await similar to get your result in then callback.


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