Actually, there is a compilation of all the standards specifications. It's on W3 (World Wide Web Consortium), where all the technical details are deeply documented (called "Technical Reports"), available on https://www.w3.org/TR/ . To this day, there are 309 published Technical Reports regarding "Standard" specifications.

Fun fact: while seeking for the link to send here, I came across a Candidate Standard entitled "Web Neural Network API", published exactly yesterday. Seems like they're intending to implement browser-native neural network capabilities inside Web specifications, and seems like the "closer future" I mentioned is even closer... 🤔