While Popper v2 saw a sizeable decrease in bundle size from v1 (-2 kB from ~7 kB minzipped to ~5 kB minzipped), this is still not optimal.
Popper addresses a lot of use cases and complexity, but to help keep consumers' bundle sizes small, we made the library tree-shakable. "Tree-shaking" is the process of eliminating unused code from your bundles, which is achieved by bundlers such as webpack, Rollup and Parcel.
If you're using the CDN, tree-shaking will not be available.
