Thinking of useful stuff that the vast majority of sites could use regardless of the type of site. You could build something on an individual basis with custom elements but I believe the following should be native so everyone can benefit.
- Table of contents element that automatically populates. Inspired by your very own implementation on the blog.
- Page scroll progress indicator. @DoncoMarketing made one but why not make it native?
- Estimated reading time with a customizable formula (it should take images into account and such)
I had these in mind for some time. No doubt thereās more like this that could be done. Does anyone have good ideas to add to the list?