Node native bindings to the Kpathsea library
npm install node-kpathsea
Building the native module requires you having the Kpathsea library and includes on your machine (which probably means you need some version of TeX Live installed).
import {Kpathsea, FILE_FORMAT} from "node-kpathsea";
const kpse = new Kpathsea("/usr/bin/tex");
kpse.findFile("cmr10", FILE_FORMAT.TFM)
// -> "/usr/share/texmf-dist/fonts/tfm/public/cm/cmr10.tfm"
MIT