Add DOM namespace to prevent shadowing by Node global types (e.g. ReadableStream)? #2120
Description
I'm maintaining libs that target both browsers and Node (through different bundles, but the source code is shared).
I'm bumping into problems specifically with the type definitions of streams, e.g. ReadableStream, which are declared globally both by @types/node and the dom lib.
While I can specify access to the Node declaration via NodeJS.ReadableStream, the same is not true for the dom one, which results in non-deterministic behavior about whether ReadableStream gets resolved as dom or Node (which are not compatible). I need a way to reference a ReadableStream type that will always resolve to the DOM types, and I thought adding the option to refer to it by namespace could be a simple solution.
As an example of the issue I am experiencing: if I use lib: ["dom"] in the tsconfig, the dom declaration is picked up, but if I instead declare lib: ["dom", "dom.AsyncIterable"], then the Node types take precedence. I assume this has to do with types/dependency order resolution, but it is obviously problematic, esp. when it comes to dependents of my libs, who will also have to deal with type resolution issues based on their tsconfigs.
I'd love to see a solution around this that does not involve copying the DOM types to .d.ts files I manually maintain in the repo; I have done this in the past and it is quite disruptive, as I'd like to support several typescript versions.