The document discusses building modern SharePoint apps using AngularJS, npm, bower, grunt, and VS2015. It addresses issues with single-page apps and outlines tools like package managers, Web Essentials, and Grunt to help with tasks like transpiling code, bundling/minification, dependencies, and testing. A demo shows using bower, npm, and Grunt in VS2013 vs. VS2015, including source maps. Issues with source maps in different browsers are also noted.