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...
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...
"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":...
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...
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...
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...
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...
随着TypeScript语言特性的完善,我们团队的前端代码已完全迁移至TypeScript。当前TypeScript完全支持JSX语法,举个例子: import * as React from 'react' type Props = { p1: string } class ComponentA extends React.Component<Props> { render(){ return <div>{this.props.p1}</div> } } <ComponentA /> ...
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...
// 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...