How did you use this experience to create Apps Script at Google?
I worked on the Google Sheets team when I first joined Google in 2007. At the time, the team was evaluating how to make our spreadsheet APIs easier to use. With Hypercard and JavaScript still bounding around in my head, I kicked off a stealth, side project to build a rough demo of what a JavaScript-based scripting language for spreadsheets could look like. This was the start of Apps Script.
Why did you choose JavaScript as the programming language?
I was certainly influenced by my previous experience with JavaScript, but also saw how popular the language was becoming in web programming. Specifically, there were a lot of non-traditional programmers using JavaScript to add small bits of dynamic functionality to websites, and the syntax was becoming well known. I still had Hypercard on my mind, and I wanted a language that anyone could code in.