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.

      Enhance Keyword Discovery with Bulk Analysis
      Moz Pro

      Enhance Keyword Discovery with Bulk Analysis

      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.

      NEW Keyword Suggestions by Topic
      Moz Pro

      NEW Keyword Suggestions by Topic

      Learn more
    • 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
    3184
    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

            • tiromedia

              Should we use Cloudflare

              Hi all, we want to speed up our website (hosted in Wordpress, traffic around 450,000 page views monthly), we use lots of images. And we're wondering about setting up on Cloudflare, however after searching a bit in Google I have seen some people say the change in IP, or possible sharing of Its with bad neighbourhoods, can really hit search rankings. So, I was wondering what the latest thinking is on this subject, would the increased speed and local server locations be a boost for SEO, moreso than a potential loss of rankings for changing IP? Thanks!

              Technical SEO | | tiromedia
              1
            • acsilver

              What do you do with product pages that are no longer used ? Delete/redirect to category/404 etc

              We have a store with thousands of active items and thousands of sold items. Each product is unique so only one of each. All products are pinned and pushed online ... and then they sell and we have a product page for a sold item. All products are keyword researched and often can rank well for longtail keywords Would you :- 1. delete the page and let it 404 (we will get thousands) 2. See if the page has a decent PA, incoming links and traffic and if so redirect to a RELEVANT category page ? ~(again there will be thousands) 3. Re use the page for another product - for example a sold ruby ring gets replaces with ta new ruby ring and we use that same page /url for the new item. Gemma

              Technical SEO | | acsilver
              0
            • Deacyde

              Canonical homepage link uses trailing slash while default homepage uses no trailing slash, will this be an issue?

              Hello, 1st off, let me explain my client in this case uses BigCommerce, and I don't have access to the backend like most other situations. So I have to rely on BG to handle certain issues. I'm curious if there is much of a difference using domain.com/ as the canonical url while BG currently is redirecting our domain to domain.com. I've been using domain.com/ consistently for the last 6 months, and since we switches stores on Friday, this issue has popped up and has me a bit worried that we'll loose somehow via link juice or overall indexing since this could confuse crawlers. Now some say that the domain url is fine using / or not, as per - https://a-moz.groupbuyseo.org/community/q/trailing-slash-and-rel-canonical But I also wanted to see what you all felt about this. What says you?

              Technical SEO | | Deacyde
              0
            • EcommerceSite

              Do I need to block my cart page in robots.txt?

              I have a site with woocommerce. Do I need to block the cart page?

              Technical SEO | | EcommerceSite
              0
            • Whittie

              Robots.txt on subdomains

              Hi guys! I keep reading conflicting information on this and it's left me a little unsure. Am I right in thinking that a website with a subdomain of shop.sitetitle.com will share the same robots.txt file as the root domain?

              Technical SEO | | Whittie
              0
            • allstatetransmission

              Robots.txt and Multiple Sitemaps

              Hello, I have a hopefully simple question but I wanted to ask to get a "second opinion" on what to do in this situation. I am working on a clients robots.txt and we have multiple sitemaps. Using yoast I have my sitemap_index.xml and I also have a sitemap-image.xml I do put them in google and bing by hand but wanted to have it added into the robots.txt for insurance. So my question is, when having multiple sitemaps called out on a robots.txt file does it matter if one is before the other? From my reading it looks like you can have multiple sitemaps called out, but I wasn't sure the best practice when writing it up in the file. Example: User-agent: * Disallow: Disallow: /cgi-bin/ Disallow: /wp-admin/ Disallow: /wp-content/plugins/ Sitemap: http://sitename.com/sitemap_index.xml Sitemap: http://sitename.com/sitemap-image.xml Thanks a ton for the feedback, I really appreciate it! :) J

              Technical SEO | | allstatetransmission
              0
            • NicDale

              Is there any value in having a blank robots.txt file?

              I've read an audit where the writer recommended creating and uploading a blank robots.txt file, there was no current file in place.  Is there any merit in having a blank robots.txt file? What is the minimum you would include in a basic robots.txt file?

              Technical SEO | | NicDale
              0
            • PioneerServices

              Can you have a /sitemap.xml and /sitemap.html on the same site?

              Thanks in advance for any responses; we really appreciate the expertise of the SEOmoz community! My question: Since the file extensions are different, can a site have both a /sitemap.xml and /sitemap.html both siting at the root domain? For example, we've already put the html sitemap in place here: https://www.pioneermilitaryloans.com/sitemap Now, we're considering adding an XML sitemap. I know standard practice is to load it at the root (www.example.com/sitemap.xml), but am wondering if this will cause conflicts. I've been unable to find this topic addressed anywhere, or any real-life examples of sites currently doing this. What do you think?

              Technical SEO | | PioneerServices
              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 - 2025 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.