前端开发Kingcean 2020-01-23
async function firstAsync () {
return 27 //return Promise.resolve(27)
}
firstAsync().then(val => {
console.log(val)
})
console.log(firstAsync() instanceof Promise) //true
async function fun () {
let promise = new Promise((resolve,reject) => {
setTimeout(function () {
resolve(‘now it is done‘)
},1000)
})
console.log(await promise)
console.log(await Promise.resolve(40))
console.log(2)
return Promise.resolve(3)
}
fun().then(val => {
console.log(val)
})