CODE EXAMPLE FOR JAVASCRIPT

discord.js

const { Client, Intents } = require('discord.js');
require('dotenv').config()
const client = new Client({
	intents: [
    	Intents.FLAGS.GUILDS,
        Intents.FLAGS.GUILD_MESSAGES
    ]
})
client.once('ready', () => {
	console.log(`Logged in as ${client.user.tag}!`)
})
client.on('messageCreate', message => {
	if (message.author.bot) return // This prevents an infinite loop
    if (message.content === 'content') {
    	message.channel.send('content')
    }
})

client.login(process.env.TOKEN)