In this chapter, I provide a quick tour of the most important features of the JavaScript language as they apply to React development. I don’t have the space to describe JavaScript completely, so I have focused on the essentials that you’ll need to get up to speed and follow the examples in this book.
JavaScript has been modernized in recent years with the addition of convenient language features and a substantial expansion of the utility functions available for common tasks such as array handling. Not all browsers support the latest features, and so the React development tools include the Babel package, which is ...
