Leave a request
SEOs don't need to learn to code, but understanding crawling and rendering principles can help turn JavaScript from a potential problem into a valuable ally. In this article, we will look at how you can effectively optimize pages using JS to improve their indexing by search engines.
We will talk about technical optimization. Almost all modern websites use JavaScript to improve user experience, interactivity, display content, and work with buttons, menus, and other elements. Our goal is to simplify the process of crawling these pages and avoid common problems that arise when processing content created using JavaScript.
This material is partly based on research and publications in the field of SEO optimization, for which we express our gratitude to the authors.
Search engines, including Google, strive to retrieve the same content that users see in the browser. Google uses Web Rendering Service (WRS), which is responsible for rendering and crawling web pages. This service is part of the Caffeine indexing system. Let's look at how JavaScript processing works using a simplified example:
Google receives the final -code to process, but actually crawls and caches all the additional resources that are needed to fully render the page, such as JS files, CSS, XHR requests, APIs and other resources. However, Googlebot may ignore some resources if they are not critical to displaying the content.
Googlebot sends a GET request to the server and receives HTTP headers and page content in response. If the title or meta tag does not prohibit indexing, the URL is added to the queue for display. It is important to remember that in mobile-first indexing conditions, the request most often comes from Google’s mobile user-agent. To find out which robot is crawling your site, you can use the URL Inspection tool in Search Console.
It is worth noting that in HTTP headers you can configure special rules for various user-agents, for example, limit indexing for some robots or show unique content. An example of such a restriction is given below, where indexing is prohibited for Googlebot, but content is available for other robots.
If you have any questions about JavaScript optimization or other aspects of SEO, write to the SEO studio "SEO COMPUTER" with any question at email info@seo.computer.
ID 1713
