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Google says blocking some JavaScript via robots.txt is allowed
Google’s John Mueller confirmed that using robots.txt to block certain JavaScript resources from Googlebot is permissible in a specific use case. This guidance affects local businesses that rely on JavaScript for site functionality and SEO.
John Mueller stated that it is okay, within a specific use case, to use robots.txt to hide JavaScript resources from Googlebot.
The clarification may let local sites reduce crawl budget waste or protect proprietary scripts without harming indexing.
Businesses should test blocking non‑essential scripts via robots.txt and monitor Search Console for any crawl issues.
Check your robots.txt to see if any non‑critical JavaScript files can be blocked and verify that core functionality remains crawlable.
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Source: Search Engine Journal · 2026-11-03
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