Modern JS Talk async function

This article was originally published on bmf-tech.com . ※This article is a reprint from the Innovator Japan Engineers’ Blog . What is async function An async function is a function that returns an Async Function object . By using the keywords async and await , you can write asynchronous processing more concisely than with Promises. The specification was defined in ES2017. How to Use It's easy to use. Simply add the async keyword at the beginning of the function definition. If you define it to return a value other than a Promise, a Promise resolved with that value will be returned. async function asyncFunc () { return ' Amazing! ' ; } asyncFunc (). then (( result ) => { console . log ( result ); }); async function asyncFuncB ( text ) { return ' Amazing! ' + text ; } asyncFuncB ( ' Indeed! ' ). then (( result ) => { console . log ( result ); }); Of course, you can also return a Promise. async function asyncFuncC () { return new Promise (( resolve , reject ) => { resolve ( ' Wonderful! '