In this episode I'll talk about why immutability is important and how it can benefit you. I will draw some comparisons between JavaScript (which doesn't treat data as immutable by default) and programming languages that have immutability built in. Finally, I will show how to make immutable operations in plain Javascript.

Episode Source Code: https://github.com/cassiozen/ReactCasts/tree/master/episode9

Babel's Object rest spread transform: https://babeljs.io/docs/plugins/transform-object-rest-spread/

Music by www.bensound.com