This repository includes a jarfile. It points to it.
npm install --save-dev selenium-server-standalone-jar
This is up to you. All you get is:
var jar = require('selenium-server-standalone-jar'); console.log(jar.path); // path to selenium-server-standalone-X.YY.Z.jar console.log(jar.version); // X.YY.Z
This repository has no advice as to how to run the jar. Other libraries should fill that void; they can depend on this library to keep things simple.