This is a VS2017 extension which enables the deployment of multiple files to an existing SharePoint 2016 or Office 365 SharePoint Online Add-In application. Supports deploying TypeScript and CoffeeScript source and source map files when saving. The benefit of the extension is there is no need to re-deploy the complete application every time there is a change. The extension is similar to the "Fast Update" capabilty introduced in the VS2012 Office Dev Tools. However, the "Fast Update" requires developers to be in debug mode. This extension does not. The extension lets developers work more productively using the SharePoint 2016 Add-In model by allowing code changes without losing existing application data and context.
Version 3.6 Information: http://bit.ly/1MohLDK
Previous Version information: http://sharepointfieldnotes.blogspot.com/2014/03/sharepoint-2013-app-model-development.html