Sometimes on a project I need to know if an npm package is tree shake-able. The is-esm utility checks to see if the package contains a distribution with ECMAScript module and outputs.
To run it: `npx is-esm PACKAGE_NAME`
ex: `npx is-esm @angular/core`
Minko Gechev originally posted this method on Twitter. At least that is where I found it. 🙂 I’m posting it here so I know where I can look for this method later.