问React如何在加载时生成多个UUID (多个选项卡)

EN

componentWillMount() {
  if (localStorage.getItem('uuid') === null) {
    fetch('http://example.com/visitor/', {
      method: 'GET',
      headers: {
        'Content-Type': 'application/json',
        Accept: 'application/json',
      },
    })
      .then(response => response.json())
      .then(jsondata => {
        localStorage.setItem('uuid', jsondata);
        this.setState({ socket: openSocket('http://localhost:3005') });
        this.state.socket('setname', this.state.userName);
      })
      .catch(err => console.log(err));
  }
}