https://github.com/web-platform-dx/feature-set
There’s a bunch of YAML files in the ‘feature-group-definitions’ directory and the ‘leaf node’ ones have ‘is_baseline’ keys in a ‘status’ dictionary. See e.g. https://github.com/web-platform-dx/feature-set/blob/main/fea...
I am very much struggling to find anywhere that actually lists versions currently counted as ‘baseline’, or any definition of what a ‘major version’ is though.
There's a JSON version of that data available here: https://cdn.jsdelivr.net/npm/web-features/index.json
But the crucial point is, it's not the same for every feature. A feature like subgrid was launched years ago in Firefox, last year in Safari and will be launched later this year in Chromium. So, by the time it's in Baseline, it will be in two versions back for Chromium browsers, but 20+ versions back for Firefox and over a year old in Safari.
Maybe showing the version numbers on the widget per feature might be useful.
- What are the exact browser versions that are included in Baseline? "Everything that is fully supported in the most recent two versions of major browsers will be part of Baseline" isn't enough information for me - I want it to tell me exactly which browser versions those are, ideally with rough estimates as to the percentage of users who are covered by them.
- Which features are part of Baseline? Do I have to browse through every page of MDN to find out? I'd rather see a single big table showing me them all in one place (and ideally also a JSON file or similar)