You do need a build step to actually perform the tree shaking, yes. > How are polyfills done in a pure ESM world? Maybe you could give an example? In my exper

You do need a build step to actually perform the tree shaking, yes. > How are polyfills done in a pure ESM world? Maybe you could give an example? In my experience you’d just import “polyfill-module”; At the top of the file. But I suspect you have something specific in mind.