let fun1 = async function () {
    let someJobIsDone = true;
    let i = 0;
    while (i < 100000000) {
        i++;
    }
    return new Promise((resolve, reject) => {

        if (someJobIsDone) {
            resolve('ok');
        } else {
            reject('bad');
        }
    });
};

fun1()
    .then(msg => console.log(msg))
    .catch(err => console.error(err));
console.log("Hi");