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))
.catch(handleError);
}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) {
handleError(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.