在我的React typescript项目中，我有以下代码：
import { useLocation } from 'react-router-dom';
export function App() {
const location = useLocation();
const background = location.state && location.state.background;
...
}
Typescript抱怨“属性‘背景’在类型‘{}’上不存在。ts（2339）”我应该如何扩展位置类型并让ts满意？
由于react-router-dom useSite不接受通用props作为useSite
import { useLocation } from "react-router-dom";
import type { Location } from "react-router";
// T is to make a generic type so you can use it wherever you want. Feel free to export in into another common types file.
interface LocationWithState<T> extends Location {
state: T;
}
interface LocationState {
background: boolean;
foo: number;
}
export function App() {
const location = useLocation() as LocationWithState<LocationState>;
const background = location.state.background; // works ✅
const foo = location.state.foo; // works ✅
const bar = location.state.bar; // error ❌
}
