index.js

const shell = require('child_process').spawn;

const command = {
  shell: "powershell.exe",
  shell_arg: "-NoProfile -ExecutionPolicy Bypass -Command",
  ps: "Get-Process |where {$_.mainWindowTItle}",
  select: "select",
  convert: "convertto-json"
}

/**
 * Build shell command
 * @param  {Array} fields
 * @return {Object}        child_process instance
 */
function build_shell(fields) {
  var fields = Array.isArray(fields) ? fields : ['mainwindowtitle'];

  var args = command.shell_arg.split(' ');
  args.push(`${command.ps} | ${command.select} ${fields.join(',')} | ${command.convert}`);
  return shell(command.shell, args);
}

/**
 * Main function to receive the list of the launched processes
 * @param  {Array} fields fields to select
 * @return {Promise}	    resolved to array of processes
 */
exports.takeTitle = function takeTitle(fields) {
  var ps = build_shell(fields);
  var data = [];

  ps.stdout.on('data', (chunk) => {
    data.push(chunk);
  })

  return new Promise((resolve) => {
    ps.on('close', () => {
      var json = JSON.parse(Buffer.concat(data).toString());
      data.length = 0;
      resolve(json);
    })
  })
}