Autoprefixer uses caniuse.com data to decide which prefixes to add. Not sure how exactly they do that and if that is a manual process or automated. Caniuse has

Autoprefixer uses caniuse.com data to decide which prefixes to add. Not sure how exactly they do that and if that is a manual process or automated. Caniuse has some data on Javascript support, but I'm not sure if it is at a sufficiently detailed level for this purpose.