Functions Modules

Functions modules are pre‑installed JavaScript libraries you can use inside a PubNub Function. They add common capabilities so you build faster without external dependencies.

Import a library with require():

1const xhr = require('xhr'); // Example import

Available modules:

Library Name	Description
XHR	Send HTTP/HTTPS requests and load response data in a Function. Useful for third‑party auth or triggering webhooks.
KV Store	Persistent key‑value store shared at the Subscribe Key level.
Advanced Math	Global (lat‑long) coordinate and geometry helpers.
Crypto	Encrypt and decrypt data in a Function.
Utils	Utility helpers for common tasks.
Codec/auth	Encode HTTP Basic Auth credentials.
Codec/base64	Encode and decode Base64 strings.
Codec/query_string	Encode and decode URI query parameters.
PubNub	Access many client SDK features from a Function.
Vault	Read‑only secrets storage.
UUID	Generate RFC‑compliant UUIDs.
JWT	Create and verify JSON Web Tokens.
JSONPath Plus	Query and transform JSON and JavaScript objects.
UGC Moderate Message	Moderate user‑generated content inline via ugc.moderateMessage. Returns actions and optional transforms.

Features not available in Functions

The Functions runtime provides a curated JavaScript environment optimized for reliability and speed.

• Native Node modules
• async/await
• Access to process and some other globals
• Installing third‑party modules via npm