Community-defined export maps for popular npm packages https://nodejs.org/api/esm.html#esm_package_entry_points
It's like DefinitelyTyped, but for export maps.
Not at all! This is actually an important tool that Skypack uses to optimize packages based on all possible entrypoints. Without an export map, Skypack has no idea how to optimize your package for delivery. If a package author hasn't provided one, this repo gives you a chance to submit your own.