Summary

In this chapter, you have learned the basics of how to build a frontend application in ClojureScript using Reagent, a wrapper around React.js.

We built a couple of Reagent components using the Hiccup markup language, which uses Clojure collections to define the HTML structure and properties. The state of the application is stored in a Reagent atom that you interacted with through the REPL.

We saw how to call JavaScript code from ClojureScript and how to convert between JavaScript and ClojureScript objects. You used these interop features to fetch image data from an HTTP server and convert the data into a ClojureScript object.

We've reached the end of the book. You've seen a lot of new things since the first pages of Chapter 1, Hello REPL!. Beyond the syntactic basics, you've learned a lot about functional programming and, even more importantly, how to think in a functional way. It's one thing to know what immutability is and something else entirely...