How do I make my discord bot copy and message every user written message?

Question

So I am new to Javascript and Discord bots. I have a stupid idea for a bot. Mostly just to annoy my friends. But the basic idea is that it will copy their message and respond with their message. I am having a problem where I cannot get the bot to respond to more than one message.

Here is my code:

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

// Logs into discord with the app's token
client.login('...');

// when logged in succesfully this code will run once
client.once('ready', () => {
    console.log('Ready!');
});

if(client.on) {
    client.once('message', function (message) {
        // Send message back on the same channel
        message.channel.send(message.content);
    }); 
}

I am aware that having client.once only sends the message once but if I were to change that to client.on it would send the same message to an infinite amount. Any help would be appreciated. Thanks.

Answer 1

You just need to prevent the bot from responding to itself.

client.on("message", (message) => {

    // Use this if you don't want the bot to respond to itself
    if (message.author.id == client.user.id) return;

    // Use this if you don't want the bot to respond to other bots (including itself)
    if (message.author.bot) return;

    message.channel.send(message.content);

});