Google Says Some JavaScript Resources Can Be Blocked

Google’s John Mueller has said that using robots.txt to keep certain resources from Googlebot can be acceptable in a particular use case, according to Search Engine Journal. The comment concerns a limited situation, rather than a general recommendation to block JavaScript resources across a website.

For marketing teams, the distinction is important. Mueller’s statement addresses whether blocking resources can be appropriate under specific circumstances; it should not be read as a finding that every resource can be blocked without consideration of its purpose. Decisions about individual files still require an understanding of the situation in which they are used.

The available source summary does not identify the use case, name the resources involved or explain how a robots.txt rule should be written. It also does not describe the outcome a website should expect from blocking a particular file. Those details matter when deciding whether the comment applies to another site.

Teams considering a change can start by identifying the resources covered by an existing or proposed rule and documenting why the restriction is being considered. They can then review the full context of Mueller’s comment with the people responsible for the site’s technical setup, rather than treating the brief statement as a universal instruction.

The distinction between a resource and a page is also worth keeping clear in internal discussions. The reported comment concerns resources being withheld from Googlebot in a specific case. The summary does not establish a broader policy for blocking pages, nor does it provide enough detail to assess an individual website’s configuration.

What this means for marketers

Use the statement as a prompt to review, not automatically revise, robots.txt rules. Ask the technical team which resources a proposed restriction would cover, what the intended purpose is and whether Mueller’s specific use case applies. Where the available summary leaves questions unanswered, consult the full source and seek technical guidance before making a change.