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Promise 执行顺序
Promise.resolve()
.then(() => {
console.log(0);
return Promise.resolve(4);
})
.then((res) => {
console.log(res);
});
Promise.resolve()
.then(() => {
console.log(1);
})
.then(() => {
console.log(2);
})
.then(() => {
console.log(3);
})
.then(() => {
console.log(5);
})
.then(() => {
console.log(6);
});
执行结果
0123456