minimal nodejs code to power on wakeonlan enabled PC with given mac address

wol.js

// eslinted; send wakeonlan magic packet for mac address defined in m
//
const m = Buffer.from([0x9c, 0x6b, 0x00, 0x15, 0xbd, 0xc2]);
const p = Buffer.concat([Buffer.alloc(6,0xff),m,m,m,m,m,m,m,m,m,m,m,m,m,m,m,m]);

const sock = require('dgram').createSocket('udp4').on('listening', function() {
  sock.setBroadcast(true);
  sock.send(p, 0, p.length, 9, '255.255.255.255', function() {
    sock.close();
  });
}).bind();

I have found it of benefit to send magic packets 3 times, some times the first or second packet is lost, dropped, ignored, etc.