node.js - How do I fix the React Router 'unexpected token <' error? - Stack Overflow
Installation and Use of React Router
The Hitchhiker's Guide to React Router v4: the hidden value of route config
Dan on Twitter: "@joseph_carney react-router *examples* are in ES6 but the *library itself* is compiled to ES5 as a build step. What you get from npm is ES5." / Twitter
React Router v4 からの主な移行・変更点一覧 - Qiita
React -router-dom 4.x version cannot use js to realize routing jump
Multiple IndexRoutes cause IndexLink to be active incorrectly · Issue #1945 · remix-run/react-router · GitHub
React Routing. I found Routing in React to be pretty… | by Daphne Watson | Medium