Standard Library

txiki.js ships a small standard library of modules that build on the core runtime. They are imported using the tjs: scheme:

import assert from 'tjs:assert';
import { parse } from 'tjs:path';
import { Database } from 'tjs:sqlite';

assert.eq(1 + 1, 2);

Modules

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 (guide)
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

See the API Reference for the full per-symbol documentation.

Build-time feature gating

A couple of modules depend on optional build features and may be absent from a custom build:

• tjs:sqlite requires BUILD_WITH_SQLITE (on by default). When disabled, importing it throws and localStorage falls back to an in-memory store.
• tjs:wasi (and the WebAssembly global) requires BUILD_WITH_WASM (on by default). When disabled, importing it throws a module-not-found error.

Detect availability at runtime via tjs.engine.features:

if (tjs.engine.features.sqlite) {
    const { Database } = await import('tjs:sqlite');
    // ...
}