siderust-js workspace

JavaScript and WebAssembly bindings for Siderust astronomy.

This repository is the publishable JS workspace. It contains the npm packages, the shared Rust binding core used by both targets, and the Node/Web transport layers that expose the public JS API.

The public surface is strongly typed around qtty-js and tempoch-js: quantities must be passed as @siderust/qtty or @siderust/qtty-web Quantity objects, and times and windows must be passed as @siderust/tempoch or @siderust/tempoch-web JulianDate, ModifiedJulianDate, and Period objects.

Packages

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

The Node and Web packages are intended to stay aligned. Platform differences are transport details, not separate domain models.

Repository layout

siderust-js/
├── siderust-core/  Shared Rust binding logic used by both targets
├── siderust-node/  Node package: @siderust/siderust
├── siderust-web/   Browser package: @siderust/siderust-web
└── scripts/        CI helpers for the Node package

What ships in 0.1.0

• A Node package exposing observer and star models, coordinate transforms, ephemerides, altitude/azimuth event search, time-window intersection, and lunar phase helpers.
• A browser/WASM package exposing the same astronomy surface with explicit asynchronous initialization via init().
• A strict typed JS API that uses Quantity, JulianDate, ModifiedJulianDate, and Period at the public boundary rather than raw numbers or *Like aliases.
• TypeScript declarations for both packages matching the runtime surface.
• Node and Web tests, examples, and package-level READMEs for the current API.

Install

Node.js

npm install @siderust/siderust @siderust/qtty @siderust/tempoch

const { Quantity } = require('@siderust/qtty');
const { JulianDate } = require('@siderust/tempoch');
const { Observer, bodyAltitudeAt } = require('@siderust/siderust');

const observer = new Observer(
  new Quantity(-17.8925, 'Degree'),
  new Quantity(28.7543, 'Degree'),
  new Quantity(2396, 'Meter'),
);

const altitude = bodyAltitudeAt(
  'Sun',
  observer,
  new JulianDate(2451545.0).toModifiedJulianDate(),
);

console.log(altitude.value, altitude.unit);

Browser / WebAssembly

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

import { init as initQtty, Quantity } from '@siderust/qtty-web';
import { init as initTempoch, JulianDate } from '@siderust/tempoch-web';
import { init, vsop87Heliocentric } from '@siderust/siderust-web';

await initQtty();
await initTempoch();
await init();

const mars = vsop87Heliocentric('Mars', new JulianDate(2451545.0));
console.log(mars.x.to('Kilometer').value);

Development

Clone the repository:

git clone git@github.com:Siderust/siderust-js.git
cd siderust-js

Node package workflow

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

The repository also exposes CI helpers:

./scripts/ci.sh all

Web package workflow

siderust-web uses wasm-pack:

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

Related documentation

• siderust-node/README.md for the Node package API and examples.
• siderust-web/README.md for the Web package API and examples.

License

AGPL-3.0. See LICENSE.