Non-jQuery alternative to FitText.js?

I'm working on a small project at the moment and one of the last things I need to do is create a nice responsive heading. I found FitText.js which seems something I like a lot and exactly what I need. The only problem is that this plugin uses jQuery and I haven't used jQuery in the project at all and don't want to just to use one small plugin. Have you ever heard of or used a similar plugin to FitText.js except it does not require jQuery?