In this guide, we’ll break down the most common technical SEO issues in JavaScript websites, show real fixes, and end with a Next.js / React SEO case study you can apply immediately.

This Technical SEO Checklist for JavaScript Websites will help you improve Google rankings, ensure proper crawling, indexing, and rendering, and avoid the most common JavaScript SEO mistakes.

Modern websites rely heavily on JavaScript frameworks like React, Angular, and Vue. While they enhance…