# Meteor — Full-Stack JavaScript Platform for Real-Time Web Apps

> Meteor is an open-source full-stack JavaScript platform for building web and mobile applications with real-time data synchronization out of the box.

## Install

Save in your project root:

# Meteor — Full-Stack JavaScript Platform for Real-Time Web Apps

## Quick Use
```bash
npx meteor create my-app
cd my-app
meteor run
# Open http://localhost:3000
```

## Introduction
Meteor is a full-stack JavaScript platform that provides an integrated build tool, package system, and reactive data layer for building web and mobile applications. It connects a Node.js backend to a client-side runtime through DDP (Distributed Data Protocol), enabling real-time data synchronization without manual WebSocket wiring.

## What Meteor Does
- Provides a unified JavaScript codebase for server, client, and mobile via Cordova
- Synchronizes data in real time between server and connected clients through DDP
- Includes a build system that bundles, minifies, and hot-reloads automatically
- Ships with Accounts system for user authentication (password, OAuth, LDAP)
- Supports MongoDB natively and integrates with PostgreSQL and Redis via packages

## Architecture Overview
Meteor runs a Node.js server that publishes data sets over DDP to connected clients. The client-side Minimongo cache mirrors server collections and applies optimistic UI updates. When the server confirms or rejects a mutation, the client reconciles automatically. The build tool (Isobuild) compiles source files, resolves npm and Atmosphere packages, and outputs platform-specific bundles for web and mobile targets.

## Self-Hosting & Configuration
- Install via `npx meteor` or the standalone installer on Linux and macOS
- Configure environment with `MONGO_URL`, `ROOT_URL`, and `PORT` variables
- Build a production bundle with `meteor build --directory` and deploy the Node.js output
- Use `settings.json` for public and private runtime configuration
- Deploy to any Node.js host, Galaxy (Meteor's managed platform), or Docker containers

## Key Features
- Reactive data layer with automatic UI updates when server data changes
- Integrated build system with code splitting, tree shaking, and hot module replacement
- First-class TypeScript support with zero additional configuration
- Built-in user accounts with pluggable OAuth and custom login handlers
- Cross-platform mobile builds through Apache Cordova integration

## Comparison with Similar Tools
- **Next.js** — React-focused with SSR and static generation, but no built-in real-time data layer
- **RedwoodJS** — Full-stack React + GraphQL + Prisma, more modern conventions, no reactive pub/sub
- **Remix** — Web-standards-first full-stack framework, progressive enhancement focus, no bundled ORM
- **Blitz.js** — Built on Next.js with zero-API data layer, smaller community
- **SvelteKit** — Svelte-based full-stack framework, lighter runtime, no built-in real-time sync

## FAQ
**Q: Is Meteor still actively maintained?**
A: Yes. Meteor 3.x moved to async APIs and modern Node.js, and Meteor Software (formerly Tiny) continues active development.

**Q: Can Meteor scale for production traffic?**
A: Yes. Meteor apps scale horizontally behind a load balancer. Sticky sessions or a shared MongoDB oplog tailing setup keeps real-time sync working across instances.

**Q: Does Meteor lock me into MongoDB?**
A: MongoDB is the default, but community packages add support for PostgreSQL, Redis, and other databases. The reactive layer can work with different backends.

**Q: How large is the Meteor client bundle?**
A: A minimal Meteor app ships roughly 100-200 KB gzipped. Tree shaking and dynamic imports keep production bundles competitive with other frameworks.

## Sources
- https://github.com/meteor/meteor
- https://docs.meteor.com/

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Source: https://tokrepo.com/en/workflows/9bdaf108-42fe-11f1-9bc6-00163e2b0d79
Author: AI Open Source