Thanks for the replies, I completely agree that GSAP needs to maintain the type definitions, especially in this day and age. Not to mention the new technologies that google is coming up with to be able to transpile typescript into closure code. But I guess my real question is that, how would I take advantage of the Business Green plugins that I paid for, while wanting to do development in typescript? Right now I had to just download the package and then stick it in a folder in my project.