Tempo The Professional Date-Time Library for the Temporal API

Tempo is a premium, high-performance wrapper for the ECMAScript Temporal API. Designed for professionals, it combines immutable state-management with a fluent, natural-language engine. It is the modern, type-safe successor to legacy libraries like Moment.js and Luxon.

Quick Start

import { Tempo } from '@magmacomputing/tempo';

// 🎯 Natural Language Parsing (Deterministic anchor)
const event = new Tempo('next Friday 3pm', { anchor: '2026-10-15' });

// 🔄 Fluent Mutations (Immutable)
const reminder = event.add({ hours: 2 }).set({ minute: 0 });

// ⏳ Comparative Durations
const diff = event.until('2026-12-25');
console.log(diff.iso); // P2M2D

// 📝 Beautiful Formatting
console.log(event.format('{mon} {dd:ord}, {yyyy}')); // October 23rd, 2026

Installation

npm install @magmacomputing/tempo       # npm
yarn add @magmacomputing/tempo          # yarn
pnpm add @magmacomputing/tempo          # pnpm
bun add @magmacomputing/tempo           # bun
deno add npm:@magmacomputing/tempo      # deno

<script type="importmap">
{
  "imports": {
    "@js-temporal/polyfill": "https://cdn.jsdelivr.net/npm/@js-temporal/polyfill@0.5.1/dist/index.esm.js",
    "@magmacomputing/tempo": "https://cdn.jsdelivr.net/npm/@magmacomputing/tempo@3/dist/tempo.bundle.esm.js"
  }
}
</script>

<script type="module">
  import '@js-temporal/polyfill';
  import { Tempo } from '@magmacomputing/tempo';
  
  const t = new Tempo('next Friday');
</script>

Why Tempo?

• Future Standard: Built natively on the TC39 Temporal proposal. Inherit the reliability of the future standard.
• Zero-Bundle Localization: Best-in-class multi-language parsing and formatting powered natively by the Intl API—no massive static locale dictionaries required.
• Natural Language: Resolve complex terms like "two days ago" with zero configuration.
• Functional Aliases: Extend the parser with custom logic using a powerful resolution context for relative date math.
• Cycle Persistence: Shift by semantic terms (Quarters, Seasons) while preserving your relative day-of-period offset.
• Zero-Cost Parsing: Lazy evaluation and smart matching ensure instantiation overhead is near-zero.
• Monorepo Resilient: Built for stability in complex environments with proxy-protected registries.
• Tree-Shakable: Keep your bundle light. Only load what you need—from Fiscal calendars to high-performance Tickers.

Documentation

For a deeper dive into the API, architecture, and advanced features:

• Official Documentation Website — Tutorials, interactive demos, and "Getting Started" guides.
• Full API Reference Guide — Detailed technical documentation for every class and method.

Contact & Support

1. Bug Reports & Features: Please open an Issue.
2. Questions & Ideas: Start a thread in Discussions.
3. Direct Contact: You can reach us at hello@magmacomputing.com.au.

Feedback & Reactions

Premium!   |   Loving it!   |   Needs work   |   Found a bug

License

Distributed under the MIT License. See LICENSE for more information.