Add sideEffects=false to package.json

[denisx]

Type of Change

feature

Description

Add side effects to package.json, help bundlers cut unused code with treeshake. Good for esm, modules, named imports.

ESM is how files and imports are organized, Side effects is how a bundler can remove obviously unused data from an assembly. Only both make maximum effect.

rollup https://rollupjs.org/configuration-options/#treeshake-modulesideeffects webpack https://webpack.js.org/guides/tree-shaking/#mark-the-file-as-side-effect-free esbuild https://esbuild.github.io/plugins/#on-resolve-arguments