JS代码执行顺序的问题，求大家帮忙看看?

Question

console.log(1);

setTimeout(function () {

    console.log(2)

},0)

new Promise(function (resolve) {

    console.log(3);

    resolve();

    console.log(4);

}).then(function () {

    console.log(5);

});

console.log(6)