Everything you need to know about Isomorphic Rendering and Dynamic Rendering for JavaScript
Published: 2022-12-01 06:08:38

One can change how content is shown to consumers and search engines. The key to implementing these changes is in rendering techniques.

Different rendering techniques can change how much of the rendering is handled by clients, the user's browser, or the bot that requests the page from the search engine. 


![Image description](https://dev-to-uploads.s3.amazonaws.com/uploads/articles/0w89gswtm4velbr2g5cg.jpg)

Isomorphic rendering and dynamic rendering are two of the most used rendering techniques.

Because isomorphic rendering may be done on the client or server, it uses Universal JavaScript.

The practice of delivering content dependent on the user agent that calls it is known as [dynamic prerendering](https://webprerender.io/). This entails providing search engines with a server-side version of your website and a client-side version for human visitors.

It might be challenging to decide between these two rendering techniques because they both offer unique benefits. So, this article will aid in your decision-making.

## **What is isomeric rendering?**

Charlie Robbins of Nodejitsu originally used the term "isomorphic" in a blog post for the business. Then, software developer Spike Brehm from Airbnb used the same phrase in a different blog post. 

However, others have suggested using the phrase Universal JavaScript in its place.

Isomeric rendering works both on the client and the server side. Pre-rendering is utilized in this rendering technique to offer content to the user or search engine. The client side then takes care of any JavaScript-required interaction.

## **What are its benefits?**

- The user will not see the standard "loading" message on the first page with isomorphic rendering because of web pre-rendering. 

- They will only see a completely rendered webpage when they access it, which will improve their user experience and the usability of the entire program. This will ultimately result in more traffic.

- As server-side data access is comparatively faster than client-side API queries, the entire completion time and the end-user interface will be substantially quicker.

- Developers need to learn fewer languages. Additionally, they will not need to develop as much code or maintain it.

## **What is dynamic rendering?**

While presenting client-side rendered material to human visitors, dynamic rendering transmits fully server-side rendered content to search engines. 

It includes [Nextjs prerendering](https://webprerender.io/next-js/) but solely for search engine bots. Search engine bots like Bingbot, Googlebot, and others are provided with a static or server-side rendered HTML version of the page created and served by the plugin.

## **What are its benefits?**

- Because developers do not need the pre-rendering content for bots and humans, dynamic rendering costs less time and resources.

- Dynamic rendering fabricates content that does not require JavaScript for crawling and indexing.

- Any interactive components that need JavaScript benefit human visitors.

- The concerns with crawl budget and page performance are resolved by dynamic rendering.

- With dynamic rendering, your website stays simple to crawl, keeping Google happy and averting a decline in traffic.

## **Final thoughts!**

Make sure the content you supply is usable and accessible for the search engine bot requesting it, regardless of the JavaScript pre-render technique you use. 

Moreover, the accessibility of your content should be your first concern, especially for less sophisticated search engines, devices, and even browsers.