[英]Typing a Custom RxJS Operator
I have a custom RxJS operator that map
s data that comes back from our API. Here's the Operator:我有一个自定义的 RxJS 运算符,它从我们的 API 返回
map
的数据。这是运算符:
export function mapActionResult(): OperatorFunction<ActionResult<any>, any> {
return map((data: ActionResult<any>) => data.result);
}
// in use:
getData() {
return this._http.get(this.someUrl).pipe(
mapActionResult()
)
}
I would like to get the ActionResult<any>
typed but am not sure how to do that.我想输入
ActionResult<any>
但我不确定该怎么做。 The ActionResult
interface takes a generic to type it properly, so I'm hoping to be able to type this operator as well. ActionResult
接口采用泛型来正确键入它,因此我希望也能够键入此运算符。
A friend on Twitter gave me the following answer , which is correct and works: Twitter 上的一位朋友给了我以下答案,它是正确的并且有效:
export function mapActionResult<T>(): OperatorFunction<ActionResult<T>, T> {
return map((data: ActionResult<T>) => data.result);
}
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