deploy-commands.mjs

import { REST, Routes } from 'discord.js';
import config from './config.json' assert { type: 'json' };
import { readdirSync } from 'node:fs';

const commands = [];
// Grab all the command files from the commands directory you created earlier
const commandFiles = readdirSync('./commands').filter((file) =>
	file.endsWith('.mjs')
);

// Grab the SlashCommandBuilder#toJSON() output of each command's data for deployment
for (const file of commandFiles) {
	await import(`./commands/${file}`).then((command) => {
		commands.push(command.default.data);
	});
}

// Construct and prepare an instance of the REST module
const rest = new REST({ version: '10' }).setToken(config.DISCORD_TOKEN);

// and deploy your commands!
(async () => {
	try {
		console.log(
			`Started refreshing ${commands.length} application (/) commands.`
		);

		// The put method is used to fully refresh all commands in the guild with the current set
		const data = await rest.put(
			Routes.applicationCommands(config.DISCORD_CLIENT_ID),
			{ body: commands }
		);

		console.log(
			`Successfully reloaded ${data.length} application (/) commands.`
		);
	} catch (error) {
		// And of course, make sure you catch and log any errors!
		console.error(error);
	}
})();