require(moduleId) loads sandbox-approved modules.

Allowed modules

Module	Purpose
canvas	Image drawing (node-canvas)
@discordjs/voice	Voice connections
crypto / node:crypto	Cryptographic utilities
util / node:util	Node utilities
url / node:url	URL parsing
querystring / node:querystring	Query string helpers
discord.js	Builders only — Client is denied

Examples

const { EmbedBuilder } = require('discord.js');
const crypto = require('crypto');
const { createCanvas } = require('canvas');

Module reference

Module	Documentation
discord.js	discord.js builders
canvas	canvas
@discordjs/voice	voice
crypto	randomBytes, randomUUID, randomInt, createHash, createHmac, timingSafeEqual
util	inspect, format, formatWithOptions, types.is* predicates
url	URL, URLSearchParams
querystring	parse, stringify

crypto example

const crypto = require('crypto');
const id = crypto.randomUUID();
const hash = crypto.createHash('sha256').update('data').digest('hex');

See sandbox for the full whitelist and restrictions.