I tried a similar idea, but for security reasons I tried to develop a DSL that would "compile" to CSS/HTML/JS instead of allowing authors/developers to write JS

I tried a similar idea, but for security reasons I tried to develop a DSL that would "compile" to CSS/HTML/JS instead of allowing authors/developers to write JS. I gave up (not only was it to difficult for me to maintain the codebase) but also because I realized most "cards" would just be ad-driven junk with poor UX and UI that would try and get personal info. from users. Didn't Google try something similar with their homepage once? It was unsafe though because you had people submitting JS and having it execute it other people's browsers.