promise打印顺序题目
setTimeout(() => {
console.log('0')
}, 0)
new Promise((resolve, reject) => {
console.log('1')
resolve()
})
.then(() => {
console.log('2')
new Promise((resolve, reject) => {
console.log('3')
resolve()
})
.then(() => {
console.log('4')
})
.then(() => {
console.log('5')
})
})
.then(() => {
console.log('6')
})
new Promise((resolve, reject) => {
console.log('7')
resolve()
}).then(() => {
console.log('8')
})
