Skip to content
    Moz logo Menu open Menu close
    • Products
      • Moz Pro
      • Moz Pro Home
      • Moz Local
      • Moz Local Home
      • STAT
      • Moz API
      • Moz API Home
      • Compare SEO Products
      • Moz Data
    • Free SEO Tools
      • Domain Analysis
      • Keyword Explorer
      • Link Explorer
      • Competitive Research
      • MozBar
      • More Free SEO Tools
    • Learn SEO
      • Beginner's Guide to SEO
      • SEO Learning Center
      • Moz Academy
      • MozCon
      • Webinars, Whitepapers, & Guides
    • Blog
    • Why Moz
      • Digital Marketers
      • Agency Solutions
      • Enterprise Solutions
      • Small Business Solutions
      • The Moz Story
      • New Releases
    • Log in
    • Log out
    • Products
      • Moz Pro

        Your all-in-one suite of SEO essentials.

      • Moz Local

        Raise your local SEO visibility with complete local SEO management.

      • STAT

        SERP tracking and analytics for enterprise SEO experts.

      • Moz API

        Power your SEO with our index of over 44 trillion links.

      • Compare SEO Products

        See which Moz SEO solution best meets your business needs.

      • Moz Data

        Power your SEO strategy & AI models with custom data solutions.

      Turn SEO data into actionable content briefs

      Turn SEO data into actionable content briefs

      Learn more
    • Free SEO Tools
      • Domain Analysis

        Get top competitive SEO metrics like DA, top pages and more.

      • Keyword Explorer

        Find traffic-driving keywords with our 1.25 billion+ keyword index.

      • Link Explorer

        Explore over 40 trillion links for powerful backlink data.

      • Competitive Research

        Uncover valuable insights on your organic search competitors.

      • MozBar

        See top SEO metrics for free as you browse the web.

      • More Free SEO Tools

        Explore all the free SEO tools Moz has to offer.

      Let your business shine with Listings AI

      Let your business shine with Listings AI

      Get found
    • Learn SEO
      • Beginner's Guide to SEO

        The #1 most popular introduction to SEO, trusted by millions.

      • SEO Learning Center

        Broaden your knowledge with SEO resources for all skill levels.

      • On-Demand Webinars

        Learn modern SEO best practices from industry experts.

      • How-To Guides

        Step-by-step guides to search success from the authority on SEO.

      • Moz Academy

        Upskill and get certified with on-demand courses & certifications.

      • MozCon

        Save on Early Bird tickets and join us in London or New York City

      Access 20 years of data with flexible pricing
      Moz API

      Access 20 years of data with flexible pricing

      Find your plan
    • Blog
    • Why Moz
      • Digital Marketers

        Simplify SEO tasks to save time and grow your traffic.

      • Small Business Solutions

        Uncover insights to make smarter marketing decisions in less time.

      • Agency Solutions

        Earn & keep valuable clients with unparalleled data & insights.

      • Enterprise Solutions

        Gain a competitive edge in the ever-changing world of search.

      • The Moz Story

        Moz was the first & remains the most trusted SEO company.

      • New Releases

        Get the scoop on the latest and greatest from Moz.

      Surface actionable competitive intel
      New Feature

      Surface actionable competitive intel

      Learn More
    • Log in
      • Moz Pro
      • Moz Local
      • Moz Local Dashboard
      • Moz API
      • Moz API Dashboard
      • Moz Academy
    • Avatar
      • Moz Home
      • Notifications
      • Account & Billing
      • Manage Users
      • Community Profile
      • My Q&A
      • My Videos
      • Log Out

    The Moz Q&A Forum

    • Forum
    • Questions
    • Users
    • Ask the Community

    Welcome to the Q&A Forum

    Browse the forum for helpful insights and fresh discussions about all things SEO.

    1. Home
    2. SEO Tactics
    3. Technical SEO
    4. OK to block /js/ folder using robots.txt?

    Moz Q&A is closed.

    After more than 13 years, and tens of thousands of questions, Moz Q&A closed on 12th December 2024. Whilst we’re not completely removing the content - many posts will still be possible to view - we have locked both new posts and new replies. More details here.

    OK to block /js/ folder using robots.txt?

    Technical SEO
    4
    4
    3204
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as question
    Log in to reply
    This topic has been deleted. Only users with question management privileges can see it.
    • AndreVanKets
      AndreVanKets last edited by

      I know Matt Cutts suggestions we allow bots to crawl css and javascript folders (http://www.youtube.com/watch?v=PNEipHjsEPU)

      But what if you have lots and lots of JS and you dont want to waste precious crawl resources?

      Also, as we update and improve the javascript on our site, we iterate the version number ?v=1.1... 1.2... 1.3... etc.

      And the legacy versions show up in Google Webmaster Tools as 404s. For example:

      http://www.discoverafrica.com/js/global_functions.js?v=1.1
      http://www.discoverafrica.com/js/jquery.cookie.js?v=1.1
      http://www.discoverafrica.com/js/global.js?v=1.2
      http://www.discoverafrica.com/js/jquery.validate.min.js?v=1.1
      http://www.discoverafrica.com/js/json2.js?v=1.1

      Wouldn't it just be easier to prevent Googlebot from crawling the js folder altogether?

      Isn't that what robots.txt was made for?

      Just to be clear - we are NOT doing any sneaky redirects or other dodgy javascript hacks.

      We're just trying to power our content and UX elegantly with javascript.

      What do you guys say:

      Obey Matt? Or run the javascript gauntlet?

      1 Reply Last reply Reply Quote 0
      • katemorris
        katemorris last edited by

        Hey!

        So, I listened to Matt's video. I see his point about wanting to crawl the JS files just in case something tricky is going on. Do understand that this is a risk you take. I don't see an issue blocking crawling of those files from a logical perspective, but if you or someone that takes over for you in the future does do something sneaky with JS and you are caught ... plus you have blacked access to the offending files ... it is going to take a lot more work to get back in good graces with them.

        It's like a cop searching your car. You have every right to ban them from doing so, but if you have nothing to hide, why make trouble? Matt is right, banning crawling of these files is not going to save you much but if you think it's an issue, feel free. Just know that they might take it as a possible flag in the future.

        Kate

        1 Reply Last reply Reply Quote 2
        • KeriMorgret
          KeriMorgret @mediabase last edited by

          Harald, it looks like the response you've quoted is from http://groups.google.com/a/googleproductforums.com/forum/#!category-topic/webmasters/crawling-indexing--ranking/9MGYEoROdkg, which is a question about a menu that has javascript. I think this poster has a slightly different question. I'll ask another associate to come on in and take a look.

          1 Reply Last reply Reply Quote 1
          • mediabase
            mediabase last edited by

            Hi Discover,I think that whenever we access the web pages , we have seen number of times that there is run time error & they asking for debug. This error message is helpful for the developers only but not for the users.

            I think that you should please refer to the following link:

            Blocking Javascript

            The truth about non javascript

            I hope that above content help to solve your query.

            KeriMorgret 1 Reply Last reply Reply Quote 0
            • 1 / 1
            • First post
              Last post

            Got a burning SEO question?

            Subscribe to Moz Pro to gain full access to Q&A, answer questions, and ask your own.


            Start my free trial


            Browse Questions

            Explore more categories

            • Moz Tools

              Chat with the community about the Moz tools.

            • SEO Tactics

              Discuss the SEO process with fellow marketers

            • Community

              Discuss industry events, jobs, and news!

            • Digital Marketing

              Chat about tactics outside of SEO

            • Research & Trends

              Dive into research and trends in the search industry.

            • Support

              Connect on product support and feature requests.

            • See all categories

            Related Questions

            • rijwielcashencarry040

              Good robots txt for magento

              Dear Communtiy, I am trying to improve the SEO ratings for my website www.rijwielcashencarry.nl (magento). My next step will be implementing robots txt to exclude some crawling pages.
              Does anybody have a good magento robots txt for me? And what need i copy exactly? Thanks everybody! Greetings, Bob

              Technical SEO | | rijwielcashencarry040
              0
            • Vacatia_SEO

              Url folder structure

              I work for a travel site and we have pages for properties in destinations and am trying to decide how best to organize the URLs basically we have our main domain, resort pages and we'll also have articles about each resort so the URL structure will actually get longer:
              A. domain.com/main-keyword/state/city-region/resort-name
              _    domain.com/family-condo-for-rent/orlando-florida/liki-tiki-village_ _   domain.com/main-keyword-in-state-city/resort-name-feature    _
              _   domain.com/family-condo-for-rent/orlando-florida/liki-tiki-village/kid-friend-pool_ B. Another way to structure would be to remove the location and keyword folders and combine. Note that some of the resort names are long and spaces are being replaced dynamically with dashes. 
              ex. domain.com/main-keyword-in-state-city/resort-name
              _      domain.com/family-condo-for-rent-in-orlando-florida/liki-tiki-village_ _      domain.com/main-keyword-in-state-city/resort-name-feature_
              _      domain.com/family-condo-for-rent-in-orlando-florida/liki-tiki-village-kid-friend-pool_ Question: is that too many folders or should i combine or break up? What would you do with this? Trying to avoid too many dashes.

              Technical SEO | | Vacatia_SEO
              0
            • niconico101

              Disallow: /404/ - Best Practice?

              Hello Moz Community, My developer has added this to my robots.txt file: Disallow: /404/ Is this considered good practice in the world of SEO? Would you do it with your clients? I feel he has great development knowledge but isn't too well versed in SEO. Thank you in advanced, Nico.

              Technical SEO | | niconico101
              1
            • isntworkdull

              Would using javascript onclick functions to override href target be ok?

              Hi all, I am currently working on a new search facility for me ecommerce site... it has very quickly dawned on me that this new facility is far better than my standard product pages - from a user point of view - i.e lots of product attributes for customers to find what they need faster, ability to compare products etc... All in all just better. BUT NO SEO VALUE!!! i want to use this search facility instead of my category/product pages... however as they are search pages i have "robots noindex them" and dont think its wise to change that... I have spoken to the developers of this software and they suggested i could use some javascript in the navigation to change the onlclick function to take the user to the search equivelant of the page... They said this way my normal pages are the ones that are still indexed by google etc, but the user has the benefit of using the improved search pages... This sounds perfect, however it also sounds a little deceptive... and i know google has loads of rules about these kinds of things, the last thing i want is to get any kind of penalty or any negative reaction from an SEO point of view... I am only considering this as it will improve the user experience on my website... Can  any one advise if this is OK, or a "no no"... P.s for those wondering i use an "off the shelf" cart system and it would cost me an arm and a leg to have these features built into my actual category  / product pages.

              Technical SEO | | isntworkdull
              0
            • jwdl

              /~username

              Hello, The utility on this site that crawls your site and highlights what it sees as potential problems reported an issue with /~username access seeing it as duplicate content i.e. mydomain.com/file.htm is the same as mydomain.com~/username/file.htm so I went to my server hosts and they disabled it using mod_userdir but GWT now gives loads of 404 errors. Have I gone about this the wrong way or was it not really a problem in the first place or have I fixed something that wasn't broken and made things worse? Thanks, Ian

              Technical SEO | | jwdl
              0
            • yousayjump

              Using Sitemap Generator - Good/Bad?

              Hi all I recently purchased the full licence of XML Sitemap Generator (http://www.xml-sitemaps.com/standalone-google-sitemap-generator.html) but have yet used it. The idea behind this is that I can deploy the package on each large e-commerce website I build and the sitemap will be generated as often as I set it be and the search engines will also be pinged automatically to inform them of the update. No more manual XML sitemap creation for me! Now it sounds great but I do not know enough about pinging search engines with XML sitemap updates on a regular basis and if this is a good or bad thing? Can it have any detrimental effect when the sitemap is changing (potentially) every day with new URLs for products being added to the site? Any thoughts or optinions would be greatly appreciated. Kris

              Technical SEO | | yousayjump
              0
            • MRCSearch

              Robots.txt Sitemap with Relative Path

              Hi Everyone, In robots.txt, can the sitemap be indicated with a relative path? I'm trying to roll out a robots file to ~200 websites, and they all have the same relative path for a sitemap but each is hosted on its own domain. Basically I'm trying to avoid needing to create 200 different robots.txt files just to change the domain. If I do need to do that, though, is there an easier way than just trudging through it?

              Technical SEO | | MRCSearch
              0
            • ErnieB

              Subdomain Removal in Robots.txt with Conditional Logic??

              I would like to see if there is a way to add conditional logic to the robots.txt file so that when we push from DEV to PRODUCTION and the robots.txt file is pushed, we don't have to remember to NOT push the robots.txt file OR edit it when it goes live. My specific situation is this: I have www.website.com, dev.website.com and new.website.com and somehow google has indexed the DEV.website.com and NEW.website.com and I'd like these to be removed from google's index as they are causing duplicate content. Should I: a) add 2 new GWT entries for DEV.website.com and NEW.website.com and VERIFY ownership - if I do this, then when the files are pushed to LIVE won't the files contain the VERIFY META CODE for the DEV version even though it's now LIVE? (hope that makes sense) b) write a robots.txt file that specifies "DISALLOW: DEV.website.com/" is that possible? I have only seen examples of DISALLOW with a "/" in the beginning... Hope this makes sense, can really use the help!  I'm on a Windows Server 2008 box running ColdFusion websites.

              Technical SEO | | ErnieB
              0

            Get started with Moz Pro!

            Unlock the power of advanced SEO tools and data-driven insights.

            Start my free trial
            Products
            • Moz Pro
            • Moz Local
            • Moz API
            • Moz Data
            • STAT
            • Product Updates
            Moz Solutions
            • SMB Solutions
            • Agency Solutions
            • Enterprise Solutions
            • Digital Marketers
            Free SEO Tools
            • Domain Authority Checker
            • Link Explorer
            • Keyword Explorer
            • Competitive Research
            • Brand Authority Checker
            • Local Citation Checker
            • MozBar Extension
            • MozCast
            Resources
            • Blog
            • SEO Learning Center
            • Help Hub
            • Beginner's Guide to SEO
            • How-to Guides
            • Moz Academy
            • API Docs
            About Moz
            • About
            • Team
            • Careers
            • Contact
            Why Moz
            • Case Studies
            • Testimonials
            Get Involved
            • Become an Affiliate
            • MozCon
            • Webinars
            • Practical Marketer Series
            • MozPod
            Connect with us

            Contact the Help team

            Join our newsletter
            Moz logo
            © 2021 - 2026 SEOMoz, Inc., a Ziff Davis company. All rights reserved. Moz is a registered trademark of SEOMoz, Inc.
            • Accessibility
            • Terms of Use
            • Privacy

            Looks like your connection to Moz was lost, please wait while we try to reconnect.