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 t
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...
"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":...
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...
React TypeScript 使用 className 属性 在自定义组件中键入和使用className道具的正确方法是什么?我曾经能够做到这一点: class MyComponent extends React.Component<MyProps, {}> { ... } 然后通过以下方式使用我的组件: <MyComponent className="my-class" />...
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...
这里我们使用泛型:P表示传递到HOC的组件的props。React.ComponentType<P>是React.FunctionComponent<P> | React.ClassComponent<P>的别名,表示传递到HOC的组件可以是类组件或者是函数组件。 class WithLoading extends React.Component<P & WithLoadingProps> ...
interface ContextType { color?: string; } @inject('color') class Message extends React.Component<ContextType> { render() { return ( <div>{this.props.color.toUpperCase()}</div> ); } } 这个时候编译器会抛出错误: 同时,不止如此,在真实的应用场景中,可能会有更多的可选属性,而且这些属性有可...
// 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...