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问题描述
我正在使用 typescript @ next
,我想将我的代码编译为 es5
,但是每次我使用 async
或 await
关键字,该消息提示编译器错误:
I'm using typescript@next
and I want to compile my code to es5
, but each time I'm using async
or await
keywords the compiler errors with that message:
Cannot find name 'await'.
这里有我的库: dom
, es2015
, es2016
, es2017
.
Heres my libs: dom
, es2015
, es2016
, es2017
.
代码示例:
let asyncFn = () => {
return new Promise((resolve:Function)=>{resolve(2)})
}
// should log `2`
console.log(await asyncFn())
即使使用 [email protected]
,也可以实现某些功能,但我还是尝试过,但是无论如何我还是无法编译我的代码.
Such things are possible even with [email protected]
, I've tried it, but somehow I am unable to compile my code anyway.
推荐答案
您需要在标记为异步"函数的函数中使用asyncFn.例如:
You need to use your asyncFn inside a function marked as an 'async' function. For example:
async someAsyncCode() {
let asyncFn = () => {
return new Promise((resolve: Function) => { resolve(2); });
}
// should log `2`
console.log(await asyncFn());
}
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