TypeScript：找不到名称异步/等待
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TypeScript: cannot find name async/await
提问by Roomy
I'm using typescript@nextand I want to compile my code to es5, but each time I'm using asyncor awaitkeywords the compiler errors with that message:
我正在使用typescript@next并且我想将我的代码编译为es5，但是每次我使用asyncorawait关键字时都会出现带有该消息的编译器错误：
Cannot find name 'await'.
Heres my libs: dom, es2015, es2016, es2017.
继承人我的库：dom, es2015, es2016, es2017。
Code example:
代码示例：
let asyncFn = () => {
return new Promise((resolve:Function)=>{resolve(2)})
}
// should log `2`
console.log(await asyncFn())
Such things are possible even with [email protected], I've tried it, but somehow I am unable to compile my code anyway.
即使使用[email protected]，这样的事情也是可能的，我已经尝试过了，但无论如何我都无法编译我的代码。
回答by Nico
You need to use your asyncFn inside a function marked as an 'async' function. For example:
您需要在标记为“异步”函数的函数中使用 asyncFn。例如：
async someAsyncCode() {
let asyncFn = () => {
return new Promise((resolve: Function) => { resolve(2); });
}
// should log `2`
console.log(await asyncFn());
}
