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by rezonant 1628 days ago
The ability to run code targetted to Node.js along with its own standard library within the browser, at least in a mostly accurate way. Writing Javascript on the web is fairly different than writing Javascript for Node.js, mainly (1) the APIs that are available to you and (2) the capabilities that are available to you. It's useful for developer tooling (Stackblitz does just this).

So it's not about running a JS implementation on top of a JS implementation per se, but being able to run JS code that uses things like CommonJS require(), Node builtin modules, etc