“Heroes of Might and Magic III” in a browser, using JavaScript.

As I understand it, it's an open-source project in JavaScript.
https://habr.com/company/jugru/blog/354014/

Another clone, and it's not really open source – it's quite impressive for a project made by one person, but there are many flaws. I haven't played it myself, but one of my friends, a big fan of the third game, couldn't play his favorite game during his free time at work, so he found many similar online resources. Most of them have problems; for example, in this project, the hero often gets stuck in dead zones and can't get out, so you can't really play it! But overall, the person set a goal and achieved it, so well done, but it's important to understand that there's still a long way to go!