I created an npm module, which is named "treeche" (Tree shakable Checker). This is an npm module to check whether your javascript/typescript application is tree-shakable or not. This may allow you to find unexpected side effects in your codebase and reduce bundle size...
https://github.com/Shinyaigeek/treeche
This is just an experimental project, so feedback is welcome!
Show HN: Treeche, Tree-Shakable Checker for JavaScript/TypeScript Application | Heykuki News