Achieving lazy hydration in Vue 3 from scratch

As web applications become more complex, performance concerns often lead developers to adopt server-side rendering (SSR) to alleviate client-side processing, yet challenges persist, particularly during the hydration process that activates interactivity on the client side. Techniques such as lazy hydration are explored to optimize performance by selectively determining when and which components should be hydrated, enhancing metrics like Time to Interactive (TTI). The article delves into implementing lazy hydration in Vue 3, building on the concept by using a wrapper that conditionally renders components based on factors like visibility, browser idleness, and user interaction. It provides a step-by-step guide to creating a lazy hydration component using Vue 3, akin to the previously popular vue-lazy-hydration library for Vue 2, while highlighting the potential of combining lazy hydration with asynchronous components to further improve loading times and user experience. Despite the challenges, this approach can significantly enhance the performance and responsiveness of large, interactive web applications.