问当promise中存在错误时，不会调用componentDidCatch

EN

class Parent extends React.Component {  
  constructor(props){
    super(props);
    this.state={hasError:false}
  }

  render() {
    if(this.state.hasError){
      return <div>Something went wrong</div>
    }

    return (
      <div>
        <h1>I am parent</h1>
        <Child></Child>
      </div>
    );
  }
  componentDidCatch(error,errorInfo){
    this.setState({
      hasError:true
    })
  }
}

class Child extends React.Component {

  render() {
    return (
      <div>
        <h1>I am child</h1>
      </div>
    );
  }

  componentDidMount(){
    fetch("https://jsonplaceholder.typicode.com/posts").then((response) => {
      throw new Error("I am the error in promise");
    }).catch((error)=>{
      console.log("Error caught in catch",error);
    })
    ;
  }
}

ReactDOM.render(<Parent name="world"/>, 
document.getElementById('container'));