index.js

const Discord = require('discord.js');
const bot = new Discord.Client();
const fs = require('fs');

const prefix = '-';

const token = 'TOKEN';

bot.commands = new Discord.Collection();

const commandFiles = fs.readdirSync('./commands/').filter(file => file.endsWith('.js'));
for(const file of commandFiles){
    const command = require(`./commands/${file}`);

    bot.commands.set(command.name, command);
}

bot.on('ready', () => {
    console.log('ValBot is online!');
});

bot.on('message', message => {
    if(!message.content.startsWith(prefix) || message.author.bot) return;

    const args = message.content.slice(prefix.length).split(/ +/);
    const command = args.shift().toLowerCase();

    if(command === 'commands'){
        bot.commands.get('commands').execute(message, args);
    } else if (command === 'site'){
        bot.commands.get('site').execute(message, args);
    } else if (command === 'yt'){
        bot.commands.get('yt').execute(message, args);
    } else if (command === 'ping'){
        bot.commands.get('ping').execute(message, args);
    }
})

bot.login(token);