[esperent]

JSR = JavaScript Registry (from the site). It seems fairly clear this is a package registry, i.e. an NPM alternative.

[simultsop]

But they promoted they will not need one at any time, to extent they will never build one. There was only deno.land as a point to discover libraries or what community builds.

[skybrian]

Yep, but it seems they learned something from the experience?

Hopefully it will be closer to how Go does it.