npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2026 – Pkg Stats / Ryan Hefner

satsim

v0.14.1

Published

SatSim for JavaScript.

Readme

SatSim JS

SatSim source code was developed under contract with AFRL/RDSM, and is approved for public release under Public Affairs release approval #AFRL-2022-1116.

screenshot

Installation from NPM

npm install satsim

Usage

NPM Installation (Recommended)

index.js

import { Universe, createViewer } from "satsim";
import "cesium/Build/Cesium/Widgets/widgets.css";

const universe = new Universe();
const viewer = createViewer("cesiumContainer", universe);

index.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
</head>
<body>
  <div id="cesiumContainer"></div>
</body>
</html>

CDN Usage

For quick prototyping or when you don't want to set up a build system, you can use the CDN version:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>SatSim CDN Example</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <!-- SatSim CDN (includes Cesium) -->
    <script src="https://unpkg.com/satsim@latest/dist/satsim.js"></script>
    <link href="https://unpkg.com/satsim@latest/dist/Widgets/widgets.css" rel="stylesheet">
    <style>
        html, body, #cesiumContainer {
            width: 100%; height: 100%; margin: 0; padding: 0; overflow: hidden;
        }
    </style>
</head>
<body>
    <div id="cesiumContainer"></div>
    <script>
        // Set Cesium base URL for assets
        window.CESIUM_BASE_URL = 'https://unpkg.com/satsim@latest/dist/';
        
        // Create universe and viewer
        const universe = new SatSim.Universe();
        const viewer = SatSim.createViewer('cesiumContainer', universe);        
    </script>
</body>
</html>

Note: The CDN file is approximately 4.4MB as it includes the entire Cesium library. For production applications, we recommend using the NPM version with a proper build system for better optimization and code splitting.

Example Webpack Application

git clone https://github.com/ssc-ai/satsimjs-example.git
cd satsimjs-example
npm install
npm start

Example NextJS Application

git clone https://github.com/ssc-ai/satsimjs-nextjs-example.git
cd satsimjs-nextjs-example
npm install
npm run dev