index.js

const { Client, Collection, GatewayIntentBits } = require("discord.js");

require("dotenv").config();

const fs = require("fs"),
  token = process.env.TOKEN,
  client = new Client({
    intents: [
      GatewayIntentBits.Guilds,
      GatewayIntentBits.GuildMessages,
      GatewayIntentBits.GuildMessageReactions,
    ],
  });

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

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"));

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));
  }
}

client.login(token);