You could also have a TypeScript to babel to ES5 workflow e.g.: <a href="http:&#x2F;&#x2F;gurustop.net&#x2F;blog&#x2F;2015&#x2F;10&#x2F;27&#x2F;babel-typescript-compiler-gulp" rel="nofollow">http:&#x2F;&#x2F;gurustop.net&#x2F;blog&#x2F;2015&#x2F;10&#x2F;27&#x2F;babel-typescript-compile...</a>