英文:
Output related to promise resolution
问题
代码的输出是：
1
2
3
我的问题是为什么数据的值是3，而不是状态为已完成的Promise？
我期望data包含一个Promise而不是数字3。
英文:
function somePromise () {
return new Promise (resolve => {
setTimeout(() => {
resolve (3)
}, 3000)
})
}
async function solve() {
console.log(1)
let data = await somePromise();
console.log(2)
console.log(data)
}
solve();
The output for this code is:
>1
>2
>3
My question is why is the value of data 3 and not the promise with state as fulfilled ?
I expected data to have a Promise and not the number 3.
答案1
得分: 2
使用await关键字在表达式中的目的是使该表达式评估为Promise的已解析值，而不是Promise本身。
英文:
The point of using the await keyword in an expression is to have that expression evaluate as the resolved value of a promise instead of as the promise itself.
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