How to Implement SSR with SolidJS 2 and Express 5 Server-side rendering (SSR) improves SEO, initial load performance, and accessibility by rendering application markup on the server before sending it to the client. SolidJS 2’s lightweight reactive model pairs perfectly with Express 5’s modern async/await support and simplified middleware for fast, scalable SSR setups. This guide walks through a complete implementation from scratch. Prerequisites Node.js v20 or later (required for Express 5’s native fetch and async features) Basic familiarity with SolidJS components and Express routing npm or yarn package manager Step 1: Initialize the Project Create a new directory and initialize a Node.js project: mkdir solid-ssr-express && cd solid-ssr-express npm init -y Enter fullscreen mode Exit fullscreen mode Install core dependencies: npm install solid-js@2 @solidjs/router@2 @solidjs/ssr express@5 Enter fullscreen mode Exit fullscreen mode Install dev dependencies for building and transpilation: npm install…