A Guide to Upgrading to React Router 4

Not long after I started working at my current position, the team realized that it would be necessary for us to upgrade to React 16 in order to use a new UI library we were keen on switching to. To figure out how much time this upgrade would require, we looked at all of our current packages to see if they were compatible with React 16, and to see if we were still using unsupported or deprecated packages. The beginnings of…