Server-Side Rendering (SSR) is a process where web pages or web applications are generated on the server and sent to the browser as complete HTML pages. In contrast, with Client-Side Rendering (CSR), the user interface is built on the client-side by downloading JavaScript code and dynamically rendering the page.
During Server-Side Rendering, the application runs on the server, and the HTML file is prepared with the actual content of the page, including data from the database or other resources. The fully rendered HTML page is then sent to the browser, and the browser only needs to load the CSS and JavaScript required for interactivity. This allows users to see a fully rendered page immediately before JavaScript is executed.
The advantages of Server-Side Rendering are:
Improved initial loading performance: Since the server pre-renders and sends the content, users see a complete page immediately, reducing waiting times and improving user experience.
Search Engine Optimization (SEO) friendliness: Search engines can crawl and index the fully rendered HTML content, leading to better content visibility in search results.
Better accessibility: If JavaScript fails to load or execute properly, users can still see the page content as it was pre-rendered on the server.
The disadvantages of Server-Side Rendering are:
Increased server load: Rendering pages on the server requires additional resources and may increase server load.
Potentially longer loading times for interactions: Each interaction with the application may trigger a new server request, resulting in a slight delay as the server renders and sends the new page to the browser.
Server-Side Rendering is well-suited for content pages and applications where SEO and initial loading time are crucial. For complex, interactive applications, a combination of Server-Side Rendering for the initial page and Client-Side Rendering for interactive parts of the application (e.g., SPA) can be used to leverage the best aspects of both approaches.
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