• JavaScript IntelliSense
• What's New in the JavaScript language service in Visual Studio 2017
• Richer IntelliSense
• IntelliSense based on type inference
• IntelliSense based on JSDoc
• IntelliSense based on TypeScript Declaration Files
• Automatic acquisition of type definitions
• Support for ES6 and beyond
• JSX syntax support
• Notable Changes from VS 2015
• No more ///<references/> or _references.js
• VSDoc
• .intellisense.js extensions
• Unsupported patterns