The WASM ecosystem is exploring this through the use of what they call "nanoprocesses" wherein libraries are wrapped into modules and provided access to nothing

The WASM ecosystem is exploring this through the use of what they call "nanoprocesses" wherein libraries are wrapped into modules and provided access to nothing by default [1]. This seems to be more of a pattern and consequence of how WASM works than a specific feature. 1. https://hacks.mozilla.org/2019/11/announcing-the-bytecode-alliance/ https://hacks.mozilla.org/2019/11/announcing-the-bytecode-al... (ignore the title, it's irrelevant to the excellent explanation that constitutes 70% of the post)