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.

      Track AI Overviews in Keyword Research
      Moz Pro

      Track AI Overviews in Keyword Research

      Try it free!
    • 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

      Unlock flexible pricing & new endpoints
      Moz API

      Unlock flexible pricing & new endpoints

      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. Intermediate & Advanced SEO
    4. Lazy Loading of products on an E-Commerce Website - Options Needed

    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.

    Lazy Loading of products on an E-Commerce Website - Options Needed

    Intermediate & Advanced SEO
    2
    4
    2652
    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.
    • JBGlobalSEO
      JBGlobalSEO last edited by

      Hi Moz Fans.

      We are in the process of re-designing our product pages and we need to improve the page load speed.

      Our developers have suggested that we load the associated products on the page using Lazy Loading, While I understand this will certainly have a positive impact on the page load speed I am concerned on the SEO impact.

      We can have upwards of 50 associated products on a page so need a solution.

      So far I have found the following solution online which uses Lazy Loading and Escaped Fragments - The concern here is from serving an alternate version to search engines.

      The solution was developed by Google not only for lazy loading, but for indexing AJAX contents in general.
      Here's the official page: Making AJAX Applications Crawlable.

      The documentation is simple and clear, but in a few words the solution is to use slightly modified URL fragments.
      A fragment is the last part of the URL, prefixed by #. Fragments are not propagated to the server, they are used only on the client side to tell the browser to show something, usually to move to a in-page bookmark.
      If instead of using # as the prefix, you use #!, this instructs Google to ask the server for a special version of your page using an ugly URL. When the server receives this ugly request, it's your responsibility to send back a static version of the page that renders an HTML snapshot (the not indexed image in our case).

      It seems complicated but it is not, let's use our gallery as an example.

      1. Every gallery thumbnail has to have an hyperlink like:  http://www.idea-r.it/...#!blogimage=<image-number></image-number>
      2. When the crawler will find this markup will change it to
        http://www.idea-r.it/...?_escaped_fragment_=blogimage=<image-number></image-number>

      Let's take a look at what you have to answer on the server side to provide a valid HTML snapshot.
      My implementation uses ASP.NET, but any server technology will be good.

      var fragment = Request.QueryString[``"_escaped_fragment_"``];``if (!String.IsNullOrEmpty(fragment))``{``var escapedParams = fragment.Split(``new``[] { ``'=' });``if (escapedParams.Length == 2)``{``var imageToDisplay = escapedParams[1];``// Render the page with the gallery showing ``// the requested image (statically!)``...``}``}

      What's rendered is an HTML snapshot, that is a static version of the gallery already positioned on the requested image (server side).
      To make it perfect we have to give the user a chance to bookmark the current gallery image.
      90% comes for free, we have only to parse the fragment on the client side and show the requested image

      if (window.location.hash)``{``// NOTE: remove initial #``var fragmentParams = window.location.hash.substring(1).split(``'='``);``var imageToDisplay = fragmentParams[1]``// Render the page with the gallery showing the requested image (dynamically!)``...``}

      The other option would be to look at a recommendation engine to show a small selection of related products instead. This would cut the total number of related products down. The concern with this one is we are removing a massive chunk of content from he existing pages, Some is not the most relevant but its content.

      Any advice and discussion welcome 🙂

      1 Reply Last reply Reply Quote 0
      • Tom-Anthony
        Tom-Anthony @JBGlobalSEO last edited by

        Ok, cool. To reiterate - with escaped_fragment you are just serving the same content in a tweaked format and Google recommend it rather than frown upon it. Good to be sure though.

        See you at SearchLove! 🙂

        1 Reply Last reply Reply Quote 2
        • JBGlobalSEO
          JBGlobalSEO last edited by

          Hi Tom, Thank you for the response,

          The concern about serving an alt version is that it would be frowned up from a SEO perspective and may lead to a form of penalty.

          I agree that escaped_fragment would be the best approach and just wanted to satisfy my own concerns before I get them working on this.

          Thank you and see you at Search Love 🙂

          Tom-Anthony 1 Reply Last reply Reply Quote 0
          • Tom-Anthony
            Tom-Anthony last edited by

            Hi,

            I am not sure I follow your concerns around serving an alternative version of the page to search engines - is that concern based on concerns it will be frowned upon or technical concerns?

            Using the escaped_fragment methodology would work for your purposes, and would be the best approach. If you have technical concerns around creating the HTML snapshots you could look at a service such as https://prerender.io/ which helps manage this process.

            If that doesn't answer your question, please give more information so we can understand more specifically where you concerns are. 🙂

            1 Reply Last reply Reply Quote 1
            • 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

            • bedynamic

              SEO on dynamic website

              Hi. I am hoping you can advise. I have a client in one of my training groups and their site is a golf booking engine where all pages are dynamically created based on parameters used in their website search. They want to know what is the best thing to do for SEO. They have some landing pages that Google can see but there is only a small bit of text at the top and the rest of the page is dynamically created. I have advised that they should create landing pages for each of their locations and clubs and use canonicals to handle what Google indexes.Is this the right advice or should they noindex? Thanks S

              Intermediate & Advanced SEO | | bedynamic
              0
            • friendoffood

              Alt tag for src='blank.gif' on lazy load images

              I didn't find an answer on a search on this, so maybe someone here has faced this before. I am loading 20 images that are in the viewport and a bit below.  The next 80 images I want to 'lazy-load'.  They therefore are seen by the bot as a blank.gif file.  However, I would like to get some credit for them by giving a description in the alt tag.  Is that a no-no?  If not, do they all have to be the same alt description since the src name is the same?  I don't want to mess things up with Google by being too aggressive, but at the same time those are valid images once they are lazy loaded, so would like to get some credit for them. Thanks!  Ted

              Intermediate & Advanced SEO | | friendoffood
              0
            • TheHecksler

              Website completely delisted - reasons?

              Hi, I got a request from a potential client as he do not understand why his website cannot be found on Google. I've checked that and found out that the complete website is not listed (complete delist) at all - expect just one pdf file.
              I've checked his robots.txt - but this is ok. I've checked the META Robots - but they are on index,follow ... ok so far. I've checked his backlinks but could not found any massive linking from bad pages - just 6 backlinks and only four of them from designdomains.com which looks like a linklist or so. I've requested access to their GWT account if available in hope to find more infos, but does anyone of you may have a quick idea what els it could be? What could be the issue? I think that they got delisted due to any bad reason ... Let me know your Ideas 🙂 THANX 🙂 Sebi

              Intermediate & Advanced SEO | | TheHecksler
              0
            • HashtagHustler

              Moving half my website to a new website: 301?

              Good Morning! We currently have two websites which are driving all of our traffic. Our end goal is to combine the two and fold them into each other. Can I redirect the duplicate content from one domain to our main domain even though the URL's are different. Ill give an example below. (The domains are not the real domains). The CEO does not want to remove the other website entirely yet, but is willing to begin some sort of consolidation process. ABCaddiction.com is the main domain which covers everything from drug addiction to dual diagnosis treatment. ABCdualdiagnosis.com is our secondary website which covers everything as well. Can I redirect the entire drug addiction half of the website to ABCaddiction.com? With the eventual goal of moving everything together.

              Intermediate & Advanced SEO | | HashtagHustler
              0
            • Hatfish

              What is the best practice for URLs for E-commerce products in multiple categories?

              Hello all! I have always worked successfully with SEO on E-commerce sites, however we are currently revamping an older site for a client and so I thought I'd turn to the community to ask what the best practices that you guys are experiencing for url structures at the moment. Obviously we do not wish to create duplicate content and so the big question is, what would you guys do for the very best structure for URLs on an E-commerce site that has products in multiple categories? Let's imagine we are selling toy cars. I have a sports car for sale, so naturally it can go in the sports cars category and it could also go in to the convertibles category too. What is the best way you have found recently that works and increases rankings, but does not create duplicate content? Thanks in advance! 🙂 Kind Regards, JDM

              Intermediate & Advanced SEO | | Hatfish
              0
            • EasyLounge

              [E-commerce] Duplicate content due to color variations (canonical/indexing)

              Hello, We currently have a lot of color variations on multiple products with almost the same content. Even with our canonicals being set, Moz's crawling tool seems to flag them as duplicate content. What we have done so far: Choosing the best-selling color variation (our "master product") Adding a rel="canonical" to every variation (with our "master product" as the canonical URL) In my opinion, it should be enough to address this issue. However, being given the fact that it's flagged as duplicate by Moz, I was wondering if there is something else we should do? Should we add a "noindex,follow" to our child products and "index,follow" to our master product? (sounds to me like such a heavy change) Thank you in advance

              Intermediate & Advanced SEO | | EasyLounge
              0
            • rexjoec

              Effects of having both http and https on my website

              You are able to view our website as either http and https on all pages. For example: You can type "http://mywebsite.com/index.html" and the site will remain as http: as you navigate the site. You can also type "https://mywebsite.com/index.html" and the site will remain as https: as you navigate the site. My question is....if you can view the entire site using either http or https, is this being seen as duplicate content/pages? Does the same hold true with "www.mywebsite.com" and "mywebsite.com"? Thanks!

              Intermediate & Advanced SEO | | rexjoec
              1
            • neooptic

              Deferred javascript loading

              Hi! This follows on from my last question. I'm trying to improve the page load speed for http://www.gear-zone.co.uk/. Currently, Google rate the page speed of the GZ site at 91/100 – with the javascript being the only place where points are being deducated. The only problem is, the JS relates to the trustpilot widget, and social links at the bottom of the page – neither of which work when they are deferred. Normally, we would add the defer attribute to the script tags, but by doing so it waits until the page is fully loaded before executing the scripts. As both the js I mentioned (reviews and buttons) use the document.Write command, adding this would write the code off the page and out of placement from where they should be. Anyone have any ideas?

              Intermediate & Advanced SEO | | neooptic
              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.