Rollup Plugin Name: commonjs

This PR contains:

• bugfix
• feature
• refactor
• documentation
• other

Are tests included?

• yes (bugfixes and features will not be merged without tests)
• no

Breaking Changes?

• yes (breaking changes will not be merged unless absolutely necessary)
• no

If yes, then include "BREAKING CHANGES:" in the first commit message body, followed by a description of what is breaking.

List any relevant issue numbers: vitejs/vite#4083 (comment)

EDIT: I guess it could be considered a breaking change is someone relied on the bug, but I usually still think of it as a bug fix.

Description

This fixes compatibility with @mediapipe/selfie_segmentation reported from the Vite issue above.

The issue is that the library ships with this code:

;(() => {
  this.namedExports = 'foo'
}).call(this)

Where this is used instead of module.exports, but in practice they're equal (stackblitz example). However, @rollup/plugin-commonjs replaces this as commonjsGlobal so it points to globalThis/window/global/self which is incorrect.

This PR updates to replace this to the exportsName, which should work like module.exports. I also updated the test that was testing the previous behaviour.