bootstrap.min.css cdns code example
Example: @reach/router
import React from "react"
import { render } from "react-dom"
import { Router, Link } from "@reach/router"
let Home = () => <div>Home</div>
let Dash = () => <div>Dash</div>
render(
<Router>
<Home path="/" />
<Dash path="dashboard" />
</Router>
)