如何将状态的值添加到对象中

let state = { value: 10 };
let obj = {};

obj.newProperty = state.value;

console.log(obj); // 输出: { newProperty: 10 }

let state = { value: 10 };
let obj = {};

Object.assign(obj, { newProperty: state.value });

console.log(obj); // 输出: { newProperty: 10 }

let state = { value: 10 };
let obj = { ...{ newProperty: state.value } };

console.log(obj); // 输出: { newProperty: 10 }

class MyObject {
  constructor(state) {
    this.newProperty = state.value;
  }
}

let state = { value: 10 };
let obj = new MyObject(state);

console.log(obj); // 输出: MyObject { newProperty: 10 }

class MyComponent extends React.Component {
  constructor(props) {
    super(props);
    this.state = { value: 10 };
  }

  componentDidMount() {
    this.setState(prevState => ({
      obj: { newProperty: prevState.value }
    }));
  }

  render() {
    return <div>{JSON.stringify(this.state.obj)}</div>;
  }
}