[![diagrams-js](./assets/logo.svg)](https://diagrams-js.hatemhosny.dev) # diagrams-js > A (vibe-coded) TypeScript/JavaScript port of the popular Python [diagrams](https://github.com/mingrammer/diagrams) library for drawing cloud system architecture diagrams as code. [![NPM Version](https://img.shields.io/npm/v/diagrams-js?color=blue)](https://www.npmjs.com/package/diagrams-js) [![NPM Downloads](https://img.shields.io/npm/dm/diagrams-js)](https://www.npmjs.com/package/diagrams-js) [![CI](https://github.com/diagrams-js/diagrams-js/actions/workflows/ci.yml/badge.svg)](https://github.com/diagrams-js/diagrams-js/actions/workflows/ci.yml) [![License: MIT](https://img.shields.io/badge/License-MIT-green.svg)](https://opensource.org/licenses/MIT)

## Features - **Diagram as Code**: Define your architecture diagrams in TypeScript - **17+ Cloud Providers**: AWS, Azure, GCP, Kubernetes, Alibaba Cloud, Oracle Cloud, IBM Cloud, and more - **2000+ Node Classes**: Comprehensive coverage of cloud services and infrastructure components - **Cross-Platform**: Works in browsers, Node.js, Deno and Bun - **Multiple Output Formats**: SVG, PNG, JPG, and DOT - **Visual Diff**: Compare diagram versions side-by-side with color-coded changes (added, removed, modified, renamed) - **Type-Safe**: Full TypeScript support with comprehensive type definitions - **WebAssembly Powered**: Uses a WebAssembly build of [Graphviz](https://graphviz.org) ([viz](https://github.com/mdaines/viz-js)) for fast, client-side rendering - **Custom Nodes**: Support for external icons and images - **Tree-Shakable**: Import only what you need ## Examples [![Web Architecture](./docs/static/examples/example3-event-processing.svg)](./docs/static/examples/example3-event-processing.svg) Check the [examples page](https://diagrams-js.hatemhosny.dev/docs/getting-started/examples) for a full list of examples. ## Interactive Playground Check out the [playground](https://diagrams-js.hatemhosny.dev/playground) for a live demo of diagrams-js in your browser. ## Installation ```bash # npm npm install diagrams-js ``` ## Quick Start ### Node.js / TypeScript ```typescript import { Diagram } from "diagrams-js"; import { EC2, Lambda } from "diagrams-js/aws/compute"; import { RDS } from "diagrams-js/aws/database"; import { S3 } from "diagrams-js/aws/storage"; import { ALB } from "diagrams-js/aws/network"; const diagram = Diagram("AWS Architecture", { direction: "TB" }); // Create nodes with icons const lb = diagram.add(ALB("Load Balancer")); const web = diagram.add(EC2("Web Server")); const api = diagram.add(Lambda("API")); const db = diagram.add(RDS("Database")); const storage = diagram.add(S3("Storage")); // Connect them lb.to(web).to(api); api.to([db, storage]); // Render to SVG const svg = await diagram.render(); ``` ### Visual Diff Compare two versions of a diagram to see what changed: ```typescript import { Diagram } from "diagrams-js"; import { writeFileSync } from "fs"; // Load two versions (e.g., from git or saved JSON) const before = JSON.parse(await fs.readFile("arch-v1.json", "utf8")); const after = JSON.parse(await fs.readFile("arch-v2.json", "utf8")); // Generate visual diff as self-contained HTML const html = await Diagram.renderDiff(before, after, { format: "html", theme: "light", showUnchanged: "show", // "show" (default), "dim", or "hide" }); await fs.writeFile("diff.html", html); ``` The diff shows: - 🟢 **Green**: Added elements - 🔴 **Red**: Removed elements - 🟠 **Amber**: Modified elements (including label changes) ### Browser ```html ``` ## Documentation 📚 **Full documentation**: [https://diagrams-js.hatemhosny.dev](https://diagrams-js.hatemhosny.dev) - [Getting Started](https://diagrams-js.hatemhosny.dev/docs/getting-started/installation) - [Examples](https://diagrams-js.hatemhosny.dev/docs/getting-started/examples) - [Guides](https://diagrams-js.hatemhosny.dev/docs/guides/diagram) - [Providers](https://diagrams-js.hatemhosny.dev/docs/guides/providers) - [Playground](https://diagrams-js.hatemhosny.dev/playground) ## Supported Providers | Provider | Description | | -------------------------------------------------------------------------- | ---------------------------------------- | | [AWS](https://diagrams-js.hatemhosny.dev/docs/nodes/aws) | Amazon Web Services nodes | | [Azure](https://diagrams-js.hatemhosny.dev/docs/nodes/azure) | Microsoft Azure nodes | | [GCP](https://diagrams-js.hatemhosny.dev/docs/nodes/gcp) | Google Cloud Platform nodes | | [Kubernetes](https://diagrams-js.hatemhosny.dev/docs/nodes/k8s) | Kubernetes nodes | | [OnPrem](https://diagrams-js.hatemhosny.dev/docs/nodes/onprem) | On-premises infrastructure nodes | | [AlibabaCloud](https://diagrams-js.hatemhosny.dev/docs/nodes/alibabacloud) | Alibaba Cloud nodes | | [DigitalOcean](https://diagrams-js.hatemhosny.dev/docs/nodes/digitalocean) | DigitalOcean nodes | | [Elastic](https://diagrams-js.hatemhosny.dev/docs/nodes/elastic) | Elastic Stack nodes | | [Firebase](https://diagrams-js.hatemhosny.dev/docs/nodes/firebase) | Firebase nodes | | [Generic](https://diagrams-js.hatemhosny.dev/docs/nodes/generic) | Generic computing nodes | | [GIS](https://diagrams-js.hatemhosny.dev/docs/nodes/gis) | GIS nodes | | [IBM](https://diagrams-js.hatemhosny.dev/docs/nodes/ibm) | IBM Cloud nodes | | [OCI](https://diagrams-js.hatemhosny.dev/docs/nodes/oci) | Oracle Cloud Infrastructure nodes | | [OpenStack](https://diagrams-js.hatemhosny.dev/docs/nodes/openstack) | OpenStack nodes | | [Outscale](https://diagrams-js.hatemhosny.dev/docs/nodes/outscale) | Outscale nodes | | [Programming](https://diagrams-js.hatemhosny.dev/docs/nodes/programming) | Programming language and framework nodes | | [SaaS](https://diagrams-js.hatemhosny.dev/docs/nodes/saas) | SaaS application nodes | View the [full list](https://diagrams-js.hatemhosny.dev/docs/guides/providers) ## Development ### Prerequisites - Node.js 18+ - pnpm - Vite+ ### Setup ```bash # Clone the repository git clone https://github.com/diagrams-js/diagrams-js.git cd diagrams-js # Install dependencies vp install # Run tests vp test # Run checks (lint, format, types) vp check # Build the library vp run build ``` ## Contributing We welcome contributions! Please see our [Contributing Guide](CONTRIBUTING.md) for details. ## Acknowledgments This project is a TypeScript port of the excellent Python [diagrams](https://github.com/mingrammer/diagrams) library by [mingrammer](https://github.com/mingrammer). ## Support - 📖 [Documentation](https://diagrams-js.hatemhosny.dev) - 🐛 [Issue Tracker](https://github.com/diagrams-js/diagrams-js/issues) - 💬 [Discussions](https://github.com/diagrams-js/diagrams-js/discussions) --- ## License This project is licensed under the MIT License - see the [LICENSE](LICENSE) file for details. ## Sponsor 💚 Please consider [sponsoring the project](https://github.com/sponsors/hatemhosny), to support its ongoing development and maintenance, as well as help to ensure that it remains a valuable resource for the developer community.