I’ve done a bit of testing on this myself in the past. I can’t see the Webflow script adding any polyfills, but I may be wrong. By omitting it animations do stop working, but that’s expected.
I have removed the Webflow js script from some of my projects that I’ve hosted myself and haven’t come across any issues. That’s not to say that there definitely aren’t any issues, I just haven’t found any.
webflow.js also contains code for webflow components like the slider, lightbox, tabs, etc.
If you do not use those complex components by Webflow and stick to only basic elements then you should be fine excluding the external script file.
Thanks guys. Thats what I was hoping. I’ll update this thread if I find anything thats off… Cheers.