javascript xyz

 

Promises, Async, and Await
promise is an object representing eventual completion or failure of an asynchronous operation.
async & await
async functions are the functions that returns promise, async function uses await  keyword inside them.
await keywords used inside the async function to pause the execution until the promise is resolved or rejected.
async makes a function return a Promise
await makes a function wait for a Promise
async function fetchData() {

    let promise = new Promise((resolve, reject) => {
        setTimeout(() => {
            console.log("resolved");
            resolve("Data received"); // Resolving the promise
        }, 1000);
    });

    try {
        let data = await promise; // Awaiting the previously created promise
        console.log(data); // "Data received"
    } catch (error) {
        console.error(error); // Handles any errors
    }
}
fetchData();