The Complete Web Feature Matrix

Every HTML, CSS & JS feature that matters — rated by real-world adoption, categorized by usage verdict, with who does it best and what most devs miss. Sortable. Filterable. One reference to rule them all.

Verdict
Category
Overused Devs reach for this when simpler or better options exist
Underused Most devs don't know this exists or underestimate it
Just Right Adoption matches appropriate use
Essential Non-negotiable for any production site
Emerging New, growing support, learn it now
Feature Category Verdict Adoption Support Real-World Usage · Who Does It Best · What Most Miss