I spent four months building a React app. Polished UI, fast load times, clean code. Then I checked Google Search Console and nearly threw my laptop out the window. Zero indexed pages. Zero. Turns out I had been shipping a beautifully crafted ghost town, and every JavaScript developer I've talked to has hit this wall at least once.

If you're building with React, Next.js, Vue, or any JS-heavy stack, the SEO checklist for JavaScript apps is different from what most tutorials teach. The WordPress-era advice will quietly mislead you. Let me share the exact checklist I now run through on every project before it ships.

SEO Checklist Step 1: Solve the JavaScript Rendering Problem First

The first item on any SEO checklist for JavaScript developers is rendering. Googlebot can execute JavaScript, but it does not always wait for it.…