async,await,Promise

function llnu() {
    return new Promise(function (t1, t2) {
        setTimeout(function () {
            t1(JSON.stringify({ 1: 1, 2: 2, 3: 3, 4: 4, 5: 5 }));
        }, 2000);
    });
}

async function xxx() {
    cb(await llnu());
}

function cb(e) {
    console.log(e)
}