Those elements will make your HTML invalid, it's not how a framework should work, sacrificing validity for functionality.

It would better work as a CSS framework with individual classes. Or, you can use the new Web Components API or just make a React component library.

The website needs some work. The colors on the website hurt my eyes, and things aren't aligned correctly.

This will perform differently on almost every browser, can you let us know what browsers are supported on the page?