"dependencies":{"@types/react":"^16.8.13","@types/react-dom":"^16.8.3","react":"^16.8.6","react-dom":"^16.8.6"},"devDependencies":{"awesome-typescript-loader":"^5.2.1","source-map-loader":"^0.2.4","typescript":"^3.4.3","webpack":...
For older applications, it's likely that you have some Class components. TypeScript works a little differently with these. The React.Component class is a generic class and it takes the props type as its first type argument. We will write out an alias for our props that I'll pass in the...
class MyComponent extends React.Component<MyProps, {}> { ... } 然后通过以下方式使用我的组件: <MyComponent className="my-class" /> 请注意,我不会在 className MyProps ,尽管之前输入了 React 来支持这种用法。 现在,我现在看到这种类型的错误: Property 'className' does not exist on type 'Intri...
有状态组件除了props之外还需要state,对于class写法的组件要泛型的支持,即Component<P, S>,因此需要传入传入state和props的类型,这样我们就可以正常使用props和state了。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 import*asReactfrom'react'interfaceProps{handleSubmit:(value:string)=>void}interfaceState{it...
class MyComponent<P>extends React.Component<P>{internalProp:P;constructor(props:P){super(props);this.internalProp=props;}render(){return(<span>hello world</span>);}}//使用组件 type IProps={name:string;age:number;};<MyComponent<IProps>name="React"age={18}/>;//Success<MyComponent<IProps...
Let's jump right into it and have a look at the previous example as a class component in TypeScript. importReact,{Component}from'react';interfaceTitleProps{title:string;subtitle?:string;}classTitleextendsComponent<TitleProps>{render(){const{title,subtitle,children}=this.props;return(<><h1>{tit...
使用create-react-app 开启 TypeScript Create React App 是一个官方支持的创建 React 单页应用程序的CLI,它提供了一个零配置的现代构建设置。当你使用 Create React App 来创建一个新的 TypeScript React 工程时,你可以运行 npx create-react-app my-app --typescript ...
ComponentType): React.ComponentType<Omit<Self, 'visible'>> { return class extends Component<Self> { render() { return <WrappedComponent {...this.props} visible={true} /> } } } 复制代码 如上,我们声明withVisible这个高阶组件时,利用泛型和类型推导,我们对高阶组件返回的新的组件以及接收的参数...
// 定义组件class MyComponent<P> extends React.Component<P> {internalProp: P;constructor(props: P) {super(props);this.internalProp = props;}render() {return (<span>hello world</span>);}}// 使用组件type IProps = { name: string; age: number; };<MyComponent<IProps> name="React" age...
首先安装 React 类型依赖: // React源码改为TypeScript之前都要手动安装这些类型依赖 npm i -D @types/react @types/react-dom 基础类型 组件泛型 React.ComponentType<P> = React.ComponentClass<P> | React.FunctionComponent<P> 只有组件类型【html 标签字符串除外】可以创建JSX.Element,示例: // 正确 const...