[React Typescript] Function overload in React hook
import { useState } from "react";
import { Equal, Expect } from "../helpers/type-utils";
type UseStateReturnValue<T> = {
value: T;
set: React.Dispatch<React.SetStateAction<T>>;
};
export function useStateAsObject<T>(): UseStateReturnValue<T | undefined>;
export function useStateAsObject<T>(initial: T): UseStateReturnValue<T>;
export function useStateAsObject<T>(initial?: T) {
const [value, set] = useState(initial);
return {
value,
set,
};
}
const notUndefined = useStateAsObject({ name: "Matt" });
type ExampleTests = [
Expect<Equal<typeof notUndefined.value, { name: string }>>,
Expect<
Equal<
typeof notUndefined.set,
React.Dispatch<React.SetStateAction<{ name: string }>>
>
>,
];
const hasUndefined = useStateAsObject<number>();
type NumTests = [
Expect<Equal<typeof hasUndefined.value, number | undefined>>,
Expect<
Equal<
typeof hasUndefined.set,
React.Dispatch<React.SetStateAction<number | undefined>>
>
>,
];
【推荐】国内首个AI IDE,深度理解中文开发场景,立即下载体验Trae
【推荐】编程新体验,更懂你的AI,立即体验豆包MarsCode编程助手
【推荐】抖音旗下AI助手豆包,你的智能百科全书,全免费不限次数
【推荐】轻量又高性能的 SSH 工具 IShell:AI 加持,快人一步
· 阿里最新开源QwQ-32B,效果媲美deepseek-r1满血版,部署成本又又又降低了!
· Manus重磅发布:全球首款通用AI代理技术深度解析与实战指南
· 开源Multi-agent AI智能体框架aevatar.ai,欢迎大家贡献代码
· 被坑几百块钱后,我竟然真的恢复了删除的微信聊天记录!
· AI技术革命,工作效率10个最佳AI工具
2022-08-21 [Typescript] Filtering properties out
2020-08-21 [Machine Learning] Multivariate Linear Regeression
2019-08-21 [Dart] Define Optional Named and Positional Parameters for Functions and Methods in Dart
2017-08-21 [D3] Animate Transitions in D3 v4
2017-08-21 [D3] Debug D3 v4 with Dev Tools
2017-08-21 [Angular] Custom directive Form validator