TypeError: Cannot read properties of undefined (reading 'toJSON') and one more

Question

const fs = require('fs');
const { Client, Collection, Intents } = require('discord.js');
const { token } = require('./config.json');

const client = new Client({ intents: [Intents.FLAGS.GUILDS] });

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

for (const file of commandFiles) {
    const command = require(`./commands/${file}`);
    client.commands.set(command.data.name, command);
}


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

client.on('interactionCreate', async interaction => {
    if (!interaction.isCommand()) return;

    const command = client.commands.get(interaction.commandName);

    if (!command) return;

    try {
        await command.execute(interaction);
    } catch (error) {
        console.error(error);
        return interaction.reply({ content: 'There was an error while executing this command!', ephemeral: true });
    }
});

client.login(token);

that's the index.js file 


the error= TypeError: Cannot read properties of undefined (reading 'name')
    at Object.<anonymous> (C:\Users\shado\OneDrive\Pulpit\Command\index.js:12:35)
    at Module._compile (node:internal/modules/cjs/loader:1101:14)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1153:10)
    at Module.load (node:internal/modules/cjs/loader:981:32)
    at Function.Module._load (node:internal/modules/cjs/loader:822:12)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:81:12)
    at node:internal/main/run_main_module:17:47





there is also a second issue


TypeError: Cannot read properties of undefined (reading 'toJSON')
    at Object.<anonymous> (C:\Users\shado\OneDrive\Pulpit\Command\deploy-commands.js:11:29)
    at Module._compile (node:internal/modules/cjs/loader:1101:14)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1153:10)
    at Module.load (node:internal/modules/cjs/loader:981:32)
    at Function.Module._load (node:internal/modules/cjs/loader:822:12)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:81:12)
    at node:internal/main/run_main_module:17:47




    const fs = require('fs');
    const { REST } = require('@discordjs/rest');
    const { Routes } = require('discord-api-types/v9');
    const { clientId, guildId, token } = require('./config.json');
    
    const commands = [];
    const commandFiles = fs.readdirSync('./commands').filter(file => file.endsWith('.js'));
    
    for (const file of commandFiles) {
        const command = require(`./commands/${file}`);
        commands.push(command.data.toJSON());
    }
    
    const rest = new REST({ version: '9' }).setToken(token);
    
    rest.put(Routes.applicationGuildCommands(clientId, guildId), { body: commands })
        .then(() => console.log('Successfully registered application commands.'))
        .catch(console.error);
    

^ deploy-commands.js the second issue concerns that

i have no idea what is happening, it worked yesterday, everything is falling apart, please help

there have been no major changes made since it last worked on my pc. none at all to the code of these two files themselves, only additional commands being added

Answer 1

I had the same issue. Try printing both command and command.data and look at the types. For me when i did typeof(command.data) i saw that one of my objects was undefined. This was due to a typo in my user.js file in commands folder. Instead of data i had written Data.