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.
The main navigation is using JS, will this have a negative impact on SEO?
-
Hi mozzers,
We just redesigned our homepage and discovered that our main nav is using JS and when disabling JS, no main nav links was showing up. Is this still considered bad practice for SEO? https://cl.ly/14ccf2509478
thanks
-
Thanks Jose!
-
Googlebot does not render JavaScript
We hear very often about JavaScript rendering is the assumption that the crawler is responsible for the rendering. But that's not the case. The rendering is done by the indexer (from Google Caffeine).More specifically, the Web Rendering Service (WRS), which is part of Google Caffeine. And this is exactly where the second great difficulty lies in the area of JavaScript SEO.
Gary Illyes says: "Also, to clarify, WRS is a subsystem of Caffeine, just like the PageRanker (cos yes, we still use it) or the canonicalization algorithm."
The process flow between the crawler and the indexer:
HTML files are downloaded.
CSS and JavaScript data will be downloaded in parallel.
WRS (Web Rendering Service) (part of Google Caffeine) is used to run JS.
WRS renders all files.
Now Google Caffeine can index the content if necessary.
And that's when Googlebot can crawl new links.
Why is that a problem? For the crawler to be able to enter the content and follow the links, it must first pass the data to the indexer. The indexer renders the content and returns it to the crawlers. Only now can the crawler see the content and follow the links. On the next page, the game starts again. Page by page. (many processes)Unlike conventional pages, where the crawler crawls numerous pages and, after crawling, passes everything collectively to the indexer. (few processes)
This process presents another challenge to search engines.
Regards
-
The only bad SEO Practice regarding JS that I've of is trying to hide the JS files from Search Engines, apparently, Google needs to render a whole page as it indexing it; so blocking any JS (& CSS for that matter) isn't a good thing.
-
Hi There,
JS rendered UI isn't negative, it is however not a good practice also.
You can find complete information to the concept of JS rendered pages and UI on this link, https://www.portent.com/blog/seo/javascript-bad-for-seo.htm .
I hope this helps.
Regards,
Vijay
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.
Related Questions
-
How will changing my website's page content affect SEO?
Our company is looking to update the content on our existing web pages and I am curious what the best way to roll out these changes are in order to maintain good SEO rankings for certain pages. The infrastructure of the site will not be modified except for maybe adding a couple new pages, but existing domains will stay the same. If the domains are staying the same does it really matter if I just updated 1 page every week or so, versus updating them all at once? Just looking for some insight into how freshening up the content on the back end pages could potentially hurt SEO rankings initially. Thanks!
Intermediate & Advanced SEO | | Bankable1 -
Can I use duplicate content in different US cities without hurting SEO?
So, I have major concerns with this plan. My company has hundreds of facilities located all over the country. Each facility has it's own website. We have a third party company working to build a content strategy for us. What they came up with is to create a bank of content specific to each service line. If/when any facility offers that service, they then upload the content for that service line to that facility website. So in theory, you might have 10-12 websites all in different cities, with the same content for a service. They claim "Google is smart, it knows its content all from the same company, and because it's in different local markets, it will still rank." My contention is that duplicate content is duplicate content, and unless it is "localize" it, Google is going to prioritize one page of it and the rest will get very little exposure in the rankings no matter where you are. I could be wrong, but I want to be sure we aren't shooting ourselves in the foot with this strategy, because it is a major major undertaking and too important to go off in the wrong direction. SEO Experts, your help is genuinely appreciated!
Intermediate & Advanced SEO | | MJTrevens1 -
SEO Impact of External links in JS tag
We have our JS tag and iframe tag being used over by 100 leading websites. What would be the SEO impact if we added a follow link in the iframe. Would it have any negative impact ? Vivek
Intermediate & Advanced SEO | | kvivek050 -
Can using nofollow on magento layered navigation hurt?
Howdy Mozzers! We would like to use no follow, no index on our magento layered navigation pages after any two filters are selected. (We are using single filter pages as landing page, so we would liked them indexed) Is it ok to use nofollow, noindex on these filter pages? Are there disadvantages of using nofollow on internal pages? Matt mentioned refraining from using nofollow internally https://www.youtube.com/watch?v=4SAPUx4Beh8 But we would like to conserve crawling bandwidth and PR flow on potentially 100's of thousands of irrelevant/duplicate filter pages.
Intermediate & Advanced SEO | | MozAddict0 -
How Google Adwords Can Impact SEO Ranking ?
Hi SEO Gurus, I have a question. How Google Adwords Can Impact SEO Ranking ?
Intermediate & Advanced SEO | | Webdeal
Positive , negative or neutral impact? I will appreciate if you will provide detailed answer Thank you for your time webdeal0 -
How do 302 redirects from Akamai content targeting impact SEO?
How do 302 redirects from Akamai content targeting impact SEO? I'm using Akamai content targeting to get people from countries and languages to the right place (eg www.abc.123 to redirect to www.abc.123/NL-nl/default.aspx where folks from the Netherlands get their localized site in dutch) and from the edge server closest to them. As far as I know Akamai doesn't allow me to use anything but a 302. Anyone run across this? is this 302 a problem? I did a fetch as googlebot on my main domain and all I see is the Akamai 302. I can't imagine this is the first time Akamai has run across this but I would like to know for sure.
Intermediate & Advanced SEO | | Positec0 -
Will using a service such as Akamai impact on rankings?
Howdy 🙂 My client has a .com site they are looking at hosting via Akamai - they have offices in various locations, e.g UK, US, AU, RU & in some Asian countries. If they used Akamai, would the best approach be to set up seperate sites per country: .co.uk .com .com.au .ru .sg etc Although my understanding is that Googlebot is located in the US so if it crawled any of those sites it would always get a US IP address? So is the answer perhaps to go with Akamai for the .com only which should target the US market and use different / seperate C class hosts for the others? Thanks! Woj
Intermediate & Advanced SEO | | wojkwasi0 -
Does font size affect SEO?
In the eyes of Google, would the font text size of say a news article affect SEO? For example, a slightly larger font being easier to read by those with bad eyes? Accessibility? If so, what size would be ideal? 10, 12, 14? Your thoughts and suggestions are greatly appreciated.
Intermediate & Advanced SEO | | Peter2640