HTML by Contents © 2024 by Toheeb Ogunbiyi is licensed under CC BY-NC-SA 4.0.
This 14-page web book is both a learning resource for designers, and a design specification for makers. You can read it at toheeb.com/en/html-by-contents/
Unlike MDN, web.dev, or w3schools, this resource organized HTML by contents over elements to aid writing semantic markup. In addition, it introduced 10 Content Models to complete the partial hierarchy of the 7 Content Models in the HTML Standard.
Special thanks to Jeremy Keith who passed a vote of confidence when this was a rough idea in 2022.