A guide to adding SSR to an existing Vue 3 app

Server-side rendering (SSR) is a technique used to enhance the performance and SEO of client-side JavaScript applications, particularly single-page applications (SPAs) built with frameworks like Vue.js, React, and Angular. While SSR is often associated with frameworks that offer built-in support like Next.js and Nuxt.js, it can also be integrated into existing applications using bundlers such as Vite for Vue 3. SSR improves initial load times and accessibility by generating static HTML on the server, which is beneficial for users with slow internet connections or those using assistive technologies. However, implementing SSR in an existing application increases complexity, requiring changes to the project's file structure and additional server resources. The process involves setting up a server using Express.js, creating entry points for both server and client, and configuring files to handle the rendering and hydration of the application. Despite its benefits, SSR comes with tradeoffs in terms of maintenance, performance latency, browser compatibility, security, and state management, which developers must consider before undertaking this integration.

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