具有某些属性的Javascript复制对象

Question

我正在使用reactjs

registerMessage与用户对象无关，但我不得不将其置于状态以显示在render（）中。发布时，我不想发布this.state，而是只希望属于用户的属性。

如何在没有registerMessage属性的情况下从this.state创建用户对象？

   constructor() {
    super();
    this.state = {
        username: '', //user
        password: '', //user
        name: '', //user
        email: '', //user
        admin: false, //user
        registerMessage: '' // NOT USER
    }
  }

componentDidMount() { }

handleChange = (evt) => {
    this.setState({
        ...this.state,
        [evt.target.name]: evt.target.value
    });
}

handleSubmit = (evt) => {
    evt.preventDefault();

    axios.post(global.apiBaseURL + "/user", this.state).then(response => {
        this.setState({registerMessage: 'You were sucessfully registered. Please wait for the admin verification.'});
        console.log(this.state);
    })
    .catch(error => {
        console.error("Could not register");
    });
}

html示例

   <input type="text" name="username" value={this.state.name} onChange={this.handleChange} className="form-control" placeholder="Username" required/>