On September 12, 2017, Microsoft released Feature Pack 2 for SharePoint 2016. The second feature pack for SharePoint 2016 brings the SharePoint Framework to an On-Premises 2016 farm. SharePoint Framework, more commonly known as SPfx, is the newest development framework which was made available on SharePoint Online last year. SPFx brings the more open development platform currently used in SharePoint Online to on-prem farms. This will allow on-prem developers to leverage modern, open-source development tools and libraries now common to web-based development.
On February 23, 2017, SharePoint Framework (SPFx) reached general availability milestone. With the GA release the framework is available for production tenants in SharePoint Online. SPFx is the newest, client-side development framework for SharePoint Web Part and page development. The framework opens the doors for open source development environments and toolchains allowing developers to use modern web development tools and techniques to work with SharePoint Online.