is it possible to install typescript 1.5 on visual studio 2015 without an internet access? As it comes "out of the box" with VS2015 it seems that no installer exists (except for the 1.5 beta)
But if you have no internet access, the VS installation ends with a warning because it cannot download the typescript tool. And at the end, the typescript tool is not present in the extensions list
The TypeScript installers are available at: http://www.microsoft.com/en-us/download/details.aspx?id=48593.
see Details section, and you should find a [Download] link next to the TypeScript 1.5.3/TypeScript 1.5.4.