API Reference

txiki.js provides a comprehensive set of APIs for building applications. The global tjs namespace contains core functionality, while additional features are available as importable standard library modules.

Global APIs

The tjs global object provides the following groups of APIs:

• Filesystem — File I/O, directory operations, path manipulation, and file watching.
• Networking — TCP, UDP, and Unix pipe sockets for building network applications.
• HTTP Server — High-performance HTTP server with WebSocket support via tjs.serve().
• Process — Spawn child processes, handle signals, and manage the current process.
• System — Environment variables, OS information, and runtime metadata.
• Engine — Low-level access to the JavaScript engine: bytecode compilation, serialization, garbage collection, and build-time feature flags (tjs.engine.features).
• Utilities — Console helpers and interactive prompts.

Standard Library

Additional functionality is available as ES modules that can be imported using the tjs: scheme:

Module	Description
tjs:assert	Assertion functions for testing
tjs:ffi	Foreign Function Interface for calling native libraries
tjs:getopts	Command-line argument parsing
tjs:hashing	Cryptographic hash functions
tjs:ipaddr	IP address parsing and manipulation
tjs:path	File path utilities (POSIX and Windows)
tjs:posix-socket	Low-level POSIX socket API
tjs:readline	Interactive line editing and ANSI colors
tjs:sqlite	SQLite3 database
tjs:utils	Utility functions for formatting and inspecting values
tjs:uuid	UUID generation and validation
tjs:wasi	WebAssembly System Interface

Note: tjs:wasi and the WebAssembly global require BUILD_WITH_WASM=ON (the default). On a build with WebAssembly disabled, importing tjs:wasi throws a module-not-found error; check tjs.engine.features.wasm to detect availability.

In addition, txiki.js supports many Web Platform APIs such as fetch, WebSocket, setTimeout, TextEncoder, and more.