AI Crawlers Do Not Execute JavaScript

Research has revealed that modern AI crawlers, such as GPTBot and ClaudeBot, do not execute JavaScript, making Single Page Applications (SPA) virtually invisible to them.

Compiled by Sergey KostenchukPublished 2026-07-28Updated 2026-07-28

2026-07-28 Coding

💻 AI Crawlers Do Not Execute JavaScript

Research has shown that crawlers such as GPTBot, ClaudeBot, and PerplexityBot do not execute JavaScript, unlike Googlebot. This makes React or Vue applications virtually invisible to AI assistants: instead of content, they see only an empty HTML skeleton.

🌍 A gap is emerging between traditional SEO and AI optimization (GEO). Developers need to transition to SSR (Server-Side Rendering) via Next.js, Astro, or use pre-rendering to ensure brands remain authoritative sources for AI models.

👤 If your website operates solely on the client side (Client-Side Rendering), AI assistants simply will not be able to find your products or services in their responses.

Source 1: https://www.smithappstudio.com/blog/ai-crawlers-cant-see-your-spa-2026/

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