在React.js中选择一个随机样式的组件

Question

I have probably an impossible thing I would like to do for my portfolio site. I want to use the React-Burger-Menu library and import all of the menu components and choose one at random upon screen load. I decided to create an array with all of the imports and use a math.random function to see if that will work. Of course, it doesn't. I understand this is probably really dumb, but I think it would be so cool if it worked. Here is what I have so far for the random function:

import { slide as Menu0 } from 'react-burger-menu';
import { stack as Menu1 } from 'react-burger-menu';
import { elastic as Menu2 } from 'react-burger-menu';
import { bubble as Menu3 } from 'react-burger-menu';
import { push as Menu4 } from 'react-burger-menu';
import { pushRotate as Menu5 } from 'react-burger-menu';
import { scaleDown as Menu6 } from 'react-burger-menu';
import { scaleRotate as Menu7 } from 'react-burger-menu';
import { fallDown as Menu8 } from 'react-burger-menu';
import { reveal as Menu9 } from 'react-burger-menu';

Menus = Array[Menu0, Menu1, Menu2, Menu3, Menu4, Menu5, Menu6, 
Menu7, Menu8, Menu9]

var Menu = Menus[Math.floor(Math.random() * Menus.length)];

export default Menu;

And here like it says in the documentation I am wrapping my nav with <Menu></Menu> tags. Here is the code:

import Menu from './sidebar';
import Contact from "../pages/contact";
import Portfolio from "../pages/portfolio";
import Index from "../pages/index";
import "../styles/customnav.css";

class customnav extends Component {
  render() {
    return (
      <Menu>
        <HashRouter>
          <div>
           <nav className="stroke">
            <ul className="menu">
            <li>
              <NavLink className="menu-item" to="/">
                Home
            </NavLink>
            </li>
            <li>
              <NavLink className="menu-item" to="/portfolio">
                Portfolio
            </NavLink>
            </li>
            <li>
              <NavLink className="menu-item" to="/contact">
                Contact
            </NavLink>
            </li>
          </ul>

          <Route exact path="/" component={Index} />
          <Route path="/portfolio" component={Portfolio} />
          <Route path="/contact" component={Contact} />
          </nav>
         </div>
      </HashRouter>
     </Menu>
    );
 }
}

export default customnav;

Here is the error code: Cannot read property 'length' of undefined

I realize this is a stretch, but thank you for your help.

Answer 1

When using Array to create an array, you need to use Array() , not Array[]

Demo

 console.log(Array[1,2,3]); console.log(Array(1,2,3)); // OR console.log([1,2,3]); 

Answer 2

Wrong syntax of array, you can just do

import { slide as Menu0 } from 'react-burger-menu';
import { stack as Menu1 } from 'react-burger-menu';
import { elastic as Menu2 } from 'react-burger-menu';
import { bubble as Menu3 } from 'react-burger-menu';
import { push as Menu4 } from 'react-burger-menu';
import { pushRotate as Menu5 } from 'react-burger-menu';
import { scaleDown as Menu6 } from 'react-burger-menu';
import { scaleRotate as Menu7 } from 'react-burger-menu';
import { fallDown as Menu8 } from 'react-burger-menu';
import { reveal as Menu9 } from 'react-burger-menu';

const Menus = [Menu0, Menu1, Menu2, Menu3, Menu4, Menu5, Menu6, 
Menu7, Menu8, Menu9];

const Menu = Menus[Math.floor(Math.random() * Menus.length)];

export default Menu;