(NRF/GATT).getPrimaryService() error handling issue

Have you updated your firmware to 1v90? The promise returning undefined rather than an error sounds like a 1v88 issue.

If you're getting Uncaught Error: Unhandled promise rejection then you should be able to catch it with a .catch though.

I guess it could be something strange with the promise implementation and your use of the second argument to then.

Have you tried just:

NRF.requestDevice({filters: [{namePrefix: 'Puck.js'}]}).then(dev=>{
  console.log("device found", dev);
  return dev.gatt.connect();
}).then(conn=>{
  console.log("connected", conn);
  return conn.getPrimaryService(0x464F);
}).then(s=>{
  console.log("service found", s);
}).catch(e=>{
  console.log( "error:", e );
});