JavaScript SEO refers to the specialized considerations required to ensure websites built heavily with JavaScript frameworks remain fully crawlable, renderable, and indexable by search engines, which historically struggled more with JavaScript-heavy content than plain HTML.
While Google has significantly improved its ability to render JavaScript, issues can still arise around rendering delays, content that only loads after specific user interactions, or JavaScript errors that prevent content from displaying correctly during the crawling process.
Testing how a page actually renders using Google Search Console’s URL Inspection tool is an important verification step for any JavaScript-heavy website, ensuring what search engines see matches what human visitors experience.
JavaScript SEO auditing is part of our Technical SEO service.