index.js

// Require the necessary default, discordJS and mongo classes
const fs = require('fs');
const { Client, Collection, GatewayIntentBits, Partials } = require('discord.js');
const { token } = require('./config.json');

// Create a new client instance
const client = new Client({ 
	intents: [
		GatewayIntentBits.Guilds,
		GatewayIntentBits.GuildMessages,
		GatewayIntentBits.MessageContent,
		GatewayIntentBits.GuildMessageReactions,
	], 
	partials: [
		Partials.Message, 
		Partials.Channel,
		Partials.Reaction
	]
});

// Create commands list
client.commands = new Collection();
const commandFiles = fs.readdirSync('./commands').filter(file => file.endsWith('.js'));

// Loop through the command files and add them to the commands list
for (const file of commandFiles) {
	const command = require(`./commands/${file}`);
	// Set a new item in the Collection
	// With the key as the command name and the value as the exported module
	client.commands.set(command.data.name, command);
}

const eventFiles = fs.readdirSync('./events').filter(file => file.endsWith('.js'));

// Loop through the event files and add them to the events list
for (const file of eventFiles) {
	const event = require(`./events/${file}`);
	if (event.once) {
		client.once(event.name, (...args) => event.execute(...args));
	} else {
		client.on(event.name, (...args) => event.execute(...args));
	}
}

// Login to Discord with your client's token
client.login(token);