tempoch-js workspace

JavaScript and WebAssembly bindings for tempoch, the Siderust astronomical time library.

This repository is the publishable JS workspace. It contains the npm packages, the thin Rust transport layers for Node and Web, and the vendored tempoch workspace that provides the canonical time-scale, epoch, and period logic.

Packages

Package	Target	Status	Notes
@siderust/tempoch	Node.js	0.1.0	Native addon built with napi-rs; uses @siderust/qtty@^0.1.0 for quantity objects in the JS API.
@siderust/tempoch-web	Browsers / bundlers	0.1.0	WebAssembly build with wasm-bindgen; requires await init() and uses @siderust/qtty-web@^0.1.0 for quantity objects in the API.

The Rust crates under tempoch-node/ and tempoch-web/ are transport layers only. All astronomical time semantics come from the vendored tempoch workspace.

Repository layout

tempoch-js/
├── tempoch/       Vendored Rust workspace (canonical time logic)
├── tempoch-node/  Node package: @siderust/tempoch
├── tempoch-web/   Browser package: @siderust/tempoch-web
└── scripts/       CI helpers for the Node package

What ships in 0.1.0

• A Node package exposing JulianDate, ModifiedJulianDate, Period, UTC conversion helpers, and epoch arithmetic utilities.
• A browser/WASM package exposing the same core time model with explicit async initialization via init().
• JS APIs that interoperate with the published qtty-js 0.1.0 line, using @siderust/qtty and @siderust/qtty-web quantity objects for durations and day-count results.
• TypeScript declarations for both packages matching the runtime surface.
• Node examples, tests, and CI for format, lint, build, test, and coverage.

Install

Node.js

npm install @siderust/tempoch @siderust/qtty

const { JulianDate } = require('@siderust/tempoch');
const { Hours } = require('@siderust/qtty/units');

const jd = JulianDate.j2000();
const later = jd.add(Hours(6));
console.log(later.toDate().toISOString());

Browser / WebAssembly

npm install @siderust/tempoch-web @siderust/qtty-web

import { init, JulianDate } from '@siderust/tempoch-web';
import { Quantity } from '@siderust/qtty-web';

await init();

const jd = JulianDate.j2000();
const later = jd.add(new Quantity(6, 'Hour'));
console.log(later.toDate().toISOString());

Development

Clone the repository with submodules so the vendored Rust workspace is present:

git clone --recurse-submodules git@github.com:Siderust/tempoch-js.git
cd tempoch-js

If you already cloned without submodules:

git submodule update --init --recursive

Node package workflow

cd tempoch-node
npm ci
npm run build:debug
npm test

The repository also exposes CI helpers:

./scripts/ci.sh all

Web package workflow

tempoch-web uses wasm-pack:

cd tempoch-web
wasm-pack build --target web --out-dir pkg --release --scope siderust

Related documentation

• tempoch-node/README.md for the Node package API and examples.
• tempoch/README.md for the vendored Rust workspace.
• tempoch/CHANGELOG.md for backend/library changes that feed these bindings.

License

AGPL-3.0. See LICENSE.