how to set a cooldown on a feature discord.js code example

Example 1: How to make add cooldowns to a command in discord.js

// First, this must be at the top level of your code, **NOT** in any event!
	const talkedRecently = new Set();    
    
    if (talkedRecently.has(msg.author.id)) {
            msg.channel.send("Wait 1 minute before getting typing this again. - " + msg.author);
    } else {

           // the user can type the command ... your command code goes here :)

        // Adds the user to the set so that they can't talk for a minute
        talkedRecently.add(msg.author.id);
        setTimeout(() => {
          // Removes the user from the set after a minute
          talkedRecently.delete(msg.author.id);
        }, 60000);
    }

Example 2: super cooldown discord.js

If you create an object of cooldowns you can get how much time they would have left by subtracting the date from the cooldown.
Like so:
//Start of code or something
var cooldowns = {}
var minute = 60000;
var hour = minute * 24;
//Set cooldown
cooldowns[message.author.id] = Date.now() + hour * 24; //Set a 24 hour cooldown
//At command check
if(cooldowns[message.author.id]){
if(cooldowns[message.author.id] > Date.now()) delete cooldowns[message.author.id];
else console.log("user still has " + Math.round((cooldowns[message.author.id] - Date.now)/minute) + " minutes left")
}