JavaScript SEO
JavaScript SEO is the work of making sure search engines can find and read pages that are built or filled in by JavaScript, the code that makes web pages interactive. Google says it handles these pages in three steps: crawling, rendering (running the code to build the page) and indexing. Google can only find links that are plain HTML links.
Source: Google Search Central, Understand the JavaScript SEO basics, checked October 29, 2026
What JavaScript SEO means for your business
If your site is built with a JavaScript framework like React, the first HTML your server sends may hold almost none of your words. Google can run the code that fills them in, but the page waits in a line first. Google's guide says a page may stay in that line for a few seconds, "but it can take longer than that." Until the page is rendered, Google has only the first HTML to go on.
Google's guide also says server-side or pre-rendering "is still a great idea because it makes your website faster for users and crawlers, and not all bots can run JavaScript." We wouldn't count on AI crawlers to run your code the way Google does. So we'd want the words that matter, like your services, your town and your prices, in the HTML the server sends.
Menus trip people up too. Google's guide says it can only find links that are <a> elements with an href, so a menu that moves people around with click code can leave whole pages unfound. To check a page, compare what you see in the browser with the page source, or run it through the URL Inspection tool in Search Console.
If your site runs on a JavaScript framework and some pages never show up in Google, checking what search engines and AI crawlers can read on your pages is where we'd start.
Last reviewed October 29, 2026. All terms
How AI answers it today
On October 29, 2026, Google's AI Overview cited SEO agency and tool blogs and YouTube rather than Google's own guide, and said days or weeks can pass before rendering. ChatGPT gave the same three steps Google lists and pointed to Search Console's URL Inspection.
Our run through ChatGPT and Google's AI Overview, October 29, 2026. A sample, not what every buyer sees.
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