It doesn't load libs from NPM directly, it has its own package management system based around URLs. Most JavaScript/TypeScript logic should port to it trivially

It doesn't load libs from NPM directly, it has its own package management system based around URLs. Most JavaScript/TypeScript logic should port to it trivially, unless they use system APIs, in which case those will have to be converted to Deno's system APIs. But mostly that just comes down to "swap out function X for Y and rearrange the parameters a bit". So in practice: it's super easy to port something, but most of the time you do actually have to port it, unfortunately.