One of the nifty things about the target being JavaScript was that I didn’t have to finish it before I could run it—it was the sort of big library where typical code wouldn’t use most of the functionality. It was audio stuff, so there were a couple of core files that needed more careful porting (from whatever in Java to Mozilla’s Audio Data API, which was a fairly good match), and then the rest was fairly routine that could be done gradually, as I needed them or just when I didn’t have anything better to focus on. Honestly, one of the biggest problems was forgetting to prefix instance properties with `this.`