如何从父级在react bootstrap(Dropdown)中设置属性

import React from 'react';
import { Dropdown } from 'react-bootstrap';

render() {
  return (
    <Dropdown>
      <Dropdown.Toggle variant="success" id="dropdown-basic">
        Dropdown Button
      </Dropdown.Toggle>

      <Dropdown.Menu>
        <Dropdown.Item href="#/action-1">Action 1</Dropdown.Item>
        <Dropdown.Item href="#/action-2">Action 2</Dropdown.Item>
        <Dropdown.Item href="#/action-3">Action 3</Dropdown.Item>
      </Dropdown.Menu>
    </Dropdown>
  );
}

constructor(props) {
  super(props);
  this.state = {
    variant: "success"
  };
}

render() {
  const { variant } = this.state;

  return (
    <Dropdown>
      <Dropdown.Toggle variant={variant} id="dropdown-basic">
        Dropdown Button
      </Dropdown.Toggle>

      <Dropdown.Menu>
        <Dropdown.Item href="#/action-1">Action 1</Dropdown.Item>
        <Dropdown.Item href="#/action-2">Action 2</Dropdown.Item>
        <Dropdown.Item href="#/action-3">Action 3</Dropdown.Item>
      </Dropdown.Menu>
    </Dropdown>
  );
}