Browser-native

The package is isomorphic — no Node-only APIs — so it runs directly in a browser:

<script type="module">
  import { mifflinBmr } from "https://esm.sh/@almostjacked/fitness-tools";
  console.log(mifflinBmr("female", 65, 168, 28));
</script>

The registry works client-side too, so a form can validate input and compute results entirely in the browser, with no server.