console.log to file and console

logToFile.js

var fs = require('fs');
var util = require('util');
var logFile = fs.createWriteStream('log.txt', { flags: 'a' });
  // Or 'w' to truncate the file every time the process starts.
var logStdout = process.stdout;

console.log = function () {
  logFile.write(util.format.apply(null, arguments) + '\n');
  logStdout.write(util.format.apply(null, arguments) + '\n');
}

//from https://stackoverflow.com/a/21061306/1579789

//const util = require('util') <-- this was already declared
//use this syntax if you have an array with more than 100 items that you are logging.
console.log(util.inspect(array, { maxArrayLength: null }));
//from https://zaiste.net/nodejs_log_over_100_array_items/