Eye of Sauron - details here

• install: npm i -S eye-of-sauron or yarn add eye-of-sauron
• then in your main file add in the top: import 'eye-of-sauron'; you will be able to access window.eyeOfSauron and trigger window.eyeOfSauron.init() later, or you can use another approach: import EyeOfSauron from 'eye-of-sauron'; and just call it as simple as EyeOfSauron(), soon you will be able to pass configuration object as an argument
• set VISUALISE_EVENTS environment variable as true if you wish to show all metrics traces on your screen.