Thanks; that looks great! It plays my rom nicely.
Unfortunately it doesn’t seem to have any documentation; the readme refers to a wiki that no longer exists. I want to publish a version which includes my rom and doesn’t make people select it with a file upload dialog. Do you know if there are any examples of such a thing published elsewhere that I could follow? I don’t know any Javascript but if I saw another game do this I bet I could figure it out.
Edit: oops; posted before I saw that you gave a second suggestion. gbaninja looks like it has better docs but it crashes loading my game while gbajs plays it flawlessly.