Persistence of a variable through program restarts

Question

I'm a bit new to JavaScript and I was wondering, how do I have a variable in my program persist after I turn off the program and turn it back on again.

For example, if I have:

//Call package
var Discord = require("discord.js");
var caterpieBot = new Discord.Client();
var nextClubMeeting;

//Listener Event for recieved messages
caterpieBot.on("message", message =>
{
  var sender = message.author; // who sent the message
  var msg = message.content.toUpperCase();
  var prefix = "!" //command to interact with caterpieBot
  var tempMsg = msg;
  var splitMsg = tempMsg.split(":")


  if(splitMsg[0] === "CATERPIE, PLEASE SCHEDULE OUR NEXT CLUB MEETING FOR")
  {
      message.channel.send("Yes " + sender + ", I will schedule the next club meeting for: " + splitMsg[1])

      nextClubMeeting = splitMsg[1]; //I WANT "nextClubMeeting" TO //PERSIST ON RESTART!

  }

And I have the user change that number to 2 when the program is running. When I restart the program if I tried to print userInputedNumber it would return as undefined. How would I have my program remember that userInputedNumber = 2 after it is restarted? (2 would be whatever number the user inputted).

Answer 1

Hm, you may need to setup a database to store that data. There are other ways of "persisting" data on the frontend where messages are being exchanged. Sessions are a looser way of doing so but this seems more of a user specific input related to that specific user. Perhaps you can route in MongoDB into your app and store it, and access it later whenever you need to?