We have continued work on the TypeScript 1.5 release, and today we are one step closer. You can now try out the TypeScript 1.5 beta as a download for VS 2015 RC, VS 2013, npm, or as source.The beta represents further progress to the final 1.5 release, with many bugfixes, support for a new metadata API that works with decorators, and updates to bring lib.d.ts up-to-date. Decorator Metadata TypeScr