Async / Await is special that makes working with promises easy to use and understand
The syntax and structure of Async / Await is makes our asynchronous handling look like synchronous code
Async / Await is alternative way of consuming promises a
asyncIn order for you to use Async / Await, you must declare a function with the async keyword
async function someFunction() {
return "something"
}
Prepending async to a function declaration means that function always returns a promise
awaitThe keyword await makes JavaScript wait until that promise settles and returns its result
await can only be used in a function that is prepended with async
await will be ignored (and your code will not wait for the asynchronous action to complete) it you try to use await in a function that is not prepended with asyncfunction delayedGreeting() {
return new Promise(resolve => {
setTimeout(() => {
resolve('Hi, sorry for the wait!')
}, 3000)
});
}
/*
Declare function with "async" keyword
*/
async function msg() {
// use "await" keyword to call promise and wait
// for the result before moving on
// to the next line of code
const msg = await delayedGreeting()
console.log(msg)
}
console.log("Calling msg()")
msg()
console.log("end of the code")