Also, Intersections were added in TS 1.6, last year:<p><a href="https:&#x2F;&#x2F;blogs.msdn.microsoft.com&#x2F;typescript&#x2F;2015&#x2F;09&#x2F;16&#x2F;announcing-typescript-1-6&#x2F;" rel="nofollow">https:&#x2F;&#x2F;blogs.msdn.microsoft.com&#x2F;typescript&#x2F;2015&#x2F;09&#x2F;16&#x2F;annou...</a><p>They seem to be moving at a decent, agile pace to improving&#x2F;expanding upon the algebraic sides of the type system.