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JS Functions
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Function ClosuresJS Classes
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JS Async
JS Callbacks
JS Aysnchronous
JS Promises
JS Sync/Await
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JavaScript Async
Async Syntax
The keyword async before a function makes the function return a promise:
Example
async function myFunction() {
return "Hello";
}
Is the same as:
async function myFunction() {
return Promise.resolve("Hello");
}
Here is how to use the Promise:
myFunction().then(
function(value) { /* code if successful */ },
function(error) { /* code if some error */ }
);
Await Syntax
The keyword await before a function makes the function wait for a promise:
let value = await promise;
The await keyword can only be used inside an async function.
Example
async function myDisplay() {
let myPromise = new Promise(function(resolve, reject) {
resolve("I love You !!");
});
document.getElementById("demo").innerHTML = await myPromise;
}
myDisplay();