[zelphirkalt]

> [...] Often contrasted with traditional single-library dead code elimination techniques common to minifiers, tree shaking eliminates unused functions from across the bundle by starting at the entry point and only including functions that may be executed.

Assuming, that methods of classes count as "function" in the terminology of that wiki page, then it seems to say methods of a class are shaken out. If they are not seen as functions (again, in that terminology), then I guess not.

[kroltan]

I think the article is over-simplifying, I believe most tree-shaking is done at the `import`/`export` boundaries.

Code that isn't used locally in a module and is not imported by any other modules is omitted.

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It helps that there isn't a global object for the local module scope, otherwise in-module dead code detection would also not be possible, since any line of code within it could use dynamic access and static analysis wouldn't be able to prove that it isn't used.