async function example

async.js

async function myAsyncFuntion() {
    try {
        const ok = await (() => new Promise((resolve, reject) => {
            setTimeout(() => {
                const luckyEnough = Math.round(Math.random() * 10) % 2 === 0;
                if (luckyEnough) {
                    resolve('ok');
                } else {
                    reject('err');
                }
            }, 2000);
        }))();
        console.log(ok);
    } catch (err) {
        console.error(err);
    }
}