使用React Typescript的状态：类型“IntrinsicAtorites”上不存在属性

Question

我是一个使用Typescript的新手，我得到一个错误提示:

没有与此调用匹配的重载。重载1 of 2，'（道具：只读

类型“{注意:{ 1:{ _ id:number；标题:字符串；正文:字符串；updatedAt:日期；};};“}”不能赋给类型“IntrinsicAttributes”

  **App.tsx**
//import statements 

  type Note={
notes: {
    1: {
_id: number;
body:string;
title:string;
updatedAt: Date

    }
} }
type State={notes: {[key:number]: Note} }
class App extends React.Component <State> {
state={
    notes: {
        1: {
            _id:1,
            title: "hello world",
            body: "this is the body",
            updatedAt:new Date()
        }
      }
   }
   render(){
   return (
    <div className="App">
        <Nav/>
        <Headers/>
        <IndexPage notes = {this.state.notes}/>

    </div>
  );
}
 }
export default App;

= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = index . tsx:

import React from 'react';

export default class IndexPage extends React.Component{
render(){
    const notes=Object.values(this.props.notes);
    return(
        <div>
            <h1> posts</h1>
            <h2> {notes[0].title}</h2>
        </div>
    )
  }
  }

Answer 1

您必须在组件上指定属性和状态类型：

应用程序

type Note = {
  _id: number,
  title: string,
  body: string,
  updatedAt: Date
}
type Props = {/*props properties*/}
type State = {
  notes: {[key:number]: Note}
}
class App extends React.Component<Props, State>{
  state={
    notes: {
        1: {
            _id:1,
            title: "hello world",
            body: "this is the body",
            updatedAt:new Date()
        }
      }
   }
   render(){
     return (
      <div className="App">
        <Nav/>
        <Headers/>
        <IndexPage notes = {this.state.notes}/>
    </div>
    );
  }
}
export default App;

索引页

//You should extract Note in other file and import it on both components
type Note = {
  _id: number,
  title: string,
  body: string,
  updatedAt: Date
}
type Props = {
  notes: {[key:number]: Note}
}
export default class IndexPage extends React.Component<Props>{
  render(){
    const notes=Object.values(this.props.notes);
    return(
        <div>
            <h1> posts</h1>
            <h2> {notes[0].title}</h2>
        </div>
    )
  }
}