前几天看到一道有意思的js执行题，大家做做看

前几天看到一道有意思的js执行题，非常有意思，哈哈，大家做做看:

<script>

setTimeout(function () {
    console.log(1);
},10);
new Promise(function (resolve) {
    setTimeout(function () {
        console.log(2);
        new Promise(function (resolve) {
            console.log(3);
            resolve('ggg')
        }).then(function () {
            console.log(4);
        });
        new Promise(function (resolve) {
            console.log(5);
            resolve('ggg')
        }).then(function () {
            console.log(6);
        });
    },10);

    console.log(7);
    resolve('ggg')
}).then(function () {
    console.log(8);
});
setTimeout(function () {
    console.log(9);
},10);

new Promise(function (resolve) {
    console.log(10);
    resolve('ggg')
}).then(function () {
    console.log(11);
});

</script>

注：浏览器和nodejs执行顺序是不一样的哦，有知道原因的请告知