When comparing Skeleton vs Element, the Slant community recommends Skeleton for most people. In the question“What are the best Bootstrap alternatives?” Skeleton is ranked 7th while Element is ranked 8th.
Ranked in these QuestionsQuestion Ranking
Pro Responsive grid
Pro Style agnostic
Pro Vanilla CSS
No bells and whistles for Skeleton, it's just CSS.
Pro Media queries
Pro Good documentation
The documentation is per version and it has basic examples that are easy to understand.
Pro JQuery is not required
Pro It's light but not empty
You can find for example date picker, option box, Sliders, Carousel, and all the basics like grid layout etc.
Con Not maintained anymore
No active development for two years.
Con Needs Vue JS
This can be PRO if you already using Vue for your project.