Learn how to use Immutable.js
J.S. LeonardJ.S. Leonard

im·mu·ta·ble i(m)ˈmyo͞odəb(ə)l/ adjective - unchanging over time or unable to be changed.

Mutating data is the source of never ending headaches in software systems, and JavaScript code is no exception. Immutable data structures, pure functions, uni-directional data flow... you've probably been hearing these terms.

Immutable.js provides us the data structures and utilities that we need to start introducing this powerful concept of immutability into our applications.