In this sample is possible to see how to implement Google Analytics through SPFx Extensions Application Customizers READ MY ARTICLE HERE

SPFx Extensions Dev Preview

• SharePoint Framework
• Office 365 tenant

THIS CODE IS PROVIDED AS IS WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING ANY IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABILITY, OR NON-INFRINGEMENT.

• Clone this repository
• in the command line run:
  • npm install
  • gulp serve

This sample illustrates how to levereage the SharePoint Framework Extensions Applciation Customizer to analyze the usage through Google Analytics of a SharePoint site:

• Application Customizer
• Google Analytics

Don't forget to insert your Google Analytics tracking code something like that 'UA-100713841-5'