"Adobe Flash used to be the go-to; what do you reach for when you want to illustrate a concept with an animated diagram?" Adobes flash suite is now called Adob

"Adobe Flash used to be the go-to; what do you reach for when you want to illustrate a concept with an animated diagram?" Adobes flash suite is now called Adobe animate and still works mostly the same and you can export to the html canvas. Scripting is a bit limited/complicated, compared to doing it with actionscript - but if you worked with flash before, this is probably the most easy solution, as it is still very powerful and straight forward.