This is a part of the series “Henry is getting ready for Olavstoppen”. You can find the other posts by following the tag “Getting Ready 4 OT”. To learn React I have been following this React course by Wes Bos. And the following is mostly my notes and ramblings trying to digest it. React is, according to, “A JavaScript library for building user interfaces.” Creating our first Component Writing HTML with JSX Linking up your CSS-file Passing dynamic data with Props Routing with React Router Helper functions Events, Refs and this Binding Events Ref and Binding Rule number 1: Don’t touch the DOM.