Software Engineering Daily · Thursday, August 27, 2026
Daniel Rosenwasser reflects on the early days of TypeScript around version 1.0, noting that the developer ecosystem was significantly different then, with open source becoming more prominent later. He acknowledges that he joined the team shortly after the 1.0 release.
“What was the relationship between typescript and javascript? And why was that such a difficult thing to figure out around 1.0?”
“Well, you'll have to take a little bit of what I say with a grain of salt because as I said, you know, I had joined only a few weeks after typescript 1.0, maybe three or four weeks prior.”
“So it was, it was early days. I think the developer ecosystem was pretty drastically different, right? Whereas in the years after I joined, open source became the default for so many of the developer tools and products that we had developed at the company.”