Play by Play is a series in which top technologists work through a problem in real time, unrehearsed, and unscripted. In this course, Play by Play Angular and ngrx, Duncan Hunter and Lars Klint cover why you would want to use ngrx, the main redux principles, and how to implement action creators, effects, selectors and unit tests. Managing state in single page apps with Angular is error prone and this is where the redux pattern and the ngrx library can help stop your app from becoming a bowl of mutable soup. By the end of this course, you’ll have the fundamental concepts of the redux pattern and ngrx. You will also know what decisions you will need to make when implementing ngrx and what are the pros and cons of each option.