My JavaScript bundle is probably full of things my app doesn't need. I want it analyzed and shrunk. First, run a bundle analysis (webpack-bundle-analyzer, source-map-explorer, or whatever fits my build; if my platform hides the build, analyze my imports statically). Show me the largest contributors by size. Then attack the usual suspects: 1. Full-library imports where only one function is used (all of lodash for one debounce, an entire icon set for five icons, a full date library for one format call). Replace with targeted imports or small native alternatives where behavior stays identical. 2. Duplicate dependencies: the same library in multiple versions. Deduplicate via the package manager or import alignment. 3. Dead code: dependencies listed in package.json that nothing imports anymore. Verify with a search before removing, then remove. 4. Client-only vs shared code: make sure server-only code (database clients, secret-bearing modules) isn't being bundled into client JavaScript. If any is, that's both bloat and a security issue; flag it loudly. 5. Code splitting: split heavy, rarely used features out of the main bundle so they load on demand. Don't swap libraries for different libraries wholesale and don't refactor working code for marginal gains. The goal is removing and splitting, not redecorating. When done, report bundle size before and after, itemized by change.