In August 2014, the learning environment at Codecademy was overhauled to use React.js and members have been asking for a React course since that time. According to Bonnie Eisenman, former Codecademy engineer and author of Learning React Native, the team chose React.js for the project because it makes it easy to build and test individual components in isolation. She said they appreciated that it had been battle-tested at Facebook and Instagram and is compatible with legacy code, making it flexible for the future. Two years later, Codecademy has released two new React.js courses.
Thanks for this tutorial Sarah, this is really great beacause React.js is almost for any website development these days.