Server-side rendering (SSR) is a technique used in web development to render pages on the server instead of the client. In a traditional web application, the server sends the raw HTML of a page to the client, which is then rendered by the client's web browser. With SSR, the server generates the final HTML of the page and sends it to the client, which can improve the performance and User Experience of the web application.
The main purpose of using SSR is to improve the performance and user experience of a web application. When a web page is rendered on the client, the client's web browser must download the raw HTML and then execute the JavaScript code to render the page. This can take some time, particularly on slower devices or networks. With SSR, the server generates the final HTML of the page and sends it to the client, which can be rendered immediately without the need for additional processing. This can result in a faster and smoother user experience.
Another advantage of using SSR is that it can improve the Search Engine Optimization (SEO) of a web application. Many search engines have difficulty indexing web pages that are rendered on the client, as the raw HTML that is sent to the client does not include the content that is generated by the JavaScript code. With SSR, the server generates the final HTML of the page, which includes the content that is generated by the JavaScript code. This can make it easier for search engines to index the content of the web page, which can improve its visibility and ranking in search results.
Additionally, using SSR can improve the security of a web application. Because the server generates the final HTML of the page, sensitive information such as user data and authentication tokens can be kept on the server and not exposed to the client. This can help to prevent security vulnerabilities such as Cross-Site Scripting (XSS) attacks, where attackers can inject malicious code into a web page that is rendered on the client.
In summary, Server-Side Rendering (SSR) is a technique used in web development to render pages on the server instead of the client. The main purpose of using SSR is to improve the performance and user experience of a web application, and to improve its search engine optimization and security. By rendering pages on the server, a web application can provide a faster and smoother user experience, and can protect sensitive data and prevent security vulnerabilities.