discord.js log last 10 messages

Question

I have the following code:

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

const { token } = require('./config.json');
const { general } = require('./config.json');
const { guild } = require('./config.json');

const client = new Client({ intents: [GatewayIntentBits.Guilds] });

client.once('ready', () => {
    console.log("Ready!");

  channel.messages.fetch({ limit: 10 })
  .then(messages => console.log(`Received ${messages.size} messages`))
  .catch(console.error);
});

client.login(token);
console.log("Online")

But when I run the code I always get this error:

ReferenceError: channel is not defined
at Client.<anonymous> (/workspaces/proJM-bridge/index.js:14:3)
at Object.onceWrapper (node:events:628:26)
at Client.emit (node:events:513:28)
at WebSocketManager.triggerClientReady (/workspaces/proJM-bridge/node_modules/discord.js/src/client/websocket/WebSocketManager.js:385:17)
at WebSocketManager.checkShardsReady (/workspaces/proJM-bridge/node_modules/discord.js/src/client/websocket/WebSocketManager.js:368:10)
at WebSocketShard.<anonymous> (/workspaces/proJM-bridge/node_modules/discord.js/src/client/websocket/WebSocketManager.js:194:14)
at WebSocketShard.emit (node:events:513:28)
at WebSocketShard.checkReady (/workspaces/proJM-bridge/node_modules/discord.js/src/client/websocket/WebSocketShard.js:511:12)
at WebSocketShard.onPacket (/workspaces/proJM-bridge/node_modules/discord.js/src/client/websocket/WebSocketShard.js:483:16)
at WebSocketShard.onMessage (/workspaces/proJM-bridge/node_modules/discord.js/src/client/websocket/WebSocketShard.js:320:10)

I can't find anywhere what is wrong and I have tried many code and still get the same error. Does someone know what I'm doing wrong?

config.json:

{
"token": "Token hidden",
"general": "1028589311282647041",
"guild": "1028241554277679236"
}

Answer 1

First of all you don't need this block:

const { token } = require('./config.json');
const { general } = require('./config.json');
const { guild } = require('./config.json');

You can write it in one line:

const { token, general, guild } = require('./config.json');

And you can fix the error with just defining channel + I think you also need to add the GuildMessages intent to your bot.

const { Client, GatewayIntentBits, TextChannel } = require('discord.js');

const { token } = require('./config.json');
const { general } = require('./config.json');
const { guild } = require('./config.json');

const client = new Client({
    intents: [
        GatewayIntentBits.Guilds,
        GatewayIntentBits.GuildMessages,
        GatewayIntentBits.MessageContent
    ]
});

client.once('ready', () => {
    console.log("Ready!");

    /**
     * @type {TextChannel}
     */
    const channel = client.guilds.cache.get(guild).channels.cache.get(general);
    if(!channel) return console.log('Invalid guildId or channelId');

    channel.messages.fetch({ limit: 10 })
    .then(messages => {
        messages.forEach((m) => {
            const content = m.content ? m.content : `<No Message Content>`;
            const embeds = m.embeds ? `<${m.embeds.length} Embed(s)>` : `<No embeds>`;
            const attachments = m.attachments ? `<${m.attachments.size} Attachment(s)>` : `<No Attachments>`;

            console.log(`---------------------------\nAuthor: ${m.author.tag}\nContent: ${content}\nEmbeds: ${embeds}\nAttachments: ${attachments}\n---------------------------`);
        });        
    })
    .catch(console.error);
});

client.login(token);

I also removed the console.log in the last line bc it's completely useless as you already have one in the ready event.