javascript - 异步 TypeScript 函数返回 jQuery promise

Question

我正在尝试在 TypeScript 中构建类似 MVC 的 Controller ，但我很难让我的异步方法返回延迟 promise 。

这是我的函数签名:

static async GetMatches(input: string, loc?: LatLng):JQueryPromise<any> {

编译器告诉我“JQueryPromise”不是有效的异步函数返回类型。

我原以为像这样的东西是异步函数最常见的用例，但我找不到任何例子。

有什么帮助吗？

Answer 1

来自 the issue detailing async functions (我没有找到更好的引用):

An Async Function must provide a return type annotation that points to a compatible Promise type. Return type inference can only be used if there is a globally defined, compatible Promise type.

然后

Async Functions require a compatible Promise abstraction to operate properly. A compatible implementation implements the following interfaces, which are to be added to the core library declarations (lib.d.ts):

interface IPromiseConstructor<T> {  
    new (init: (resolve: (value: T | IPromise<T>) => void, reject: (reason: any) => void) => void): IPromise<T>;  
}  

interface IPromise<T> {  
    then<TResult>(onfulfilled: (value: T) => TResult | IPromise<TResult>, onrejected: (reason: any) => TResult | IPromise<TResult>): IPromise<TResult>;  
}

jQuery 延迟是 - for good reasons - 不在他们的兼容性列表中。