Questions tagged [javascript]

JavaScript is a dialect of the standardized ECMAScript programming language, primarily used for scripting web-pages. Use this tag for questions regarding ECMAScript and its dialects/ implementations: JavaScript, JScript, etc., excluding ActionScript.

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26 votes
5 answers
6k views

Does the Google spider render JavaScript?

Does the Google spider knows how to render JavaScript, or only HTML?
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31 votes
8 answers
30k views

How do you exclude yourself from Google Analytics on your website using cookies?

I'm trying to set up an exclusion filter with a browser cookie, so that my own visits to my don't show up in my Google Analytics. I tried 3 different methods and none of them have worked so far. I ...
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27 votes
3 answers
11k views

Lazy loading images and effects on SEO

We are using the following technique to lazy load images in our site: For all images we put in the src attribute a url for a default img (i.e. a loader) and put the actual image url in the data-src ...
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  • 447
55 votes
17 answers
3k views

HTML validation: is it worth it?

What are the advantages and disadvantages (if any) of making sure that all pages validate compared to having non-valid HTML that however works on all major browsers? Also, is having valid HTML after ...
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4 votes
2 answers
1k views

Will AggregateRating markup that is generated dynamically by client side JavaScript show stars on Google search?

Google show stars in Google search with JavaScript dynamically generated rich snippets? I'm thinking about starting a widget that my users will put in their website. My widget will generate rich ...
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  • 123
15 votes
2 answers
7k views

Is this a good approach to image Lazy Loading for SEO?

For images loaded via AJAX, or that I don't want indexed, use the data-* attribute approach: <img data-src="path/to/image.jpg" class="js-lazy-load" /> The javascript maps the data-src ...
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  • 153
34 votes
2 answers
7k views

Someone else is using our Google Analytics Tracking code number. What do we do?

After looking over our Analytics today, I realized that another website is also using our same tracking code #, which is cause quite a few incorrect hits to our Analytics. Are there any ways to ...
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40 votes
4 answers
106k views

How do I set expiration headers for CSS, JS, and Images?

I have recently analysed my website with pagespeed addon on firebug. It suggested me to set expiration on CSS, JS and image files. I am wondering how do i do this?
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  • 1,658
24 votes
6 answers
5k views

Can we ignore visitors without JavaScript enabled?

If you have developed a JavaScript based website, is it worth doing the extra work to make it accessible for visitors who don't have JavaScript enabled? What percentage of visitors are in this ...
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7 votes
1 answer
3k views

For how long does the google bot wait after document ready before taking a snapshot of the webpage?

As the google bot lets the JS do its work on the page while crawling, for how long does it wait to let the javascript execute after document ready ? Suppose I have an AJAX response that takes longer ...
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5 votes
2 answers
2k views

Google follows JavaScript string as relative path - produces 404 error

This is my first question on here so I hope I'm not breaking any rules, but I have a problem: I have a site that uses an Adobe Site Catalyst for its online analytics. The suite supports tagging ...
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4 votes
1 answer
124 views

Core web vitals - LCP is being recounted on element outside viewport

I have been trying to control LCP on my website but unfortunately a strange phenomenon is continuously occurring, An element which is not in viewport is considered to be an LCP. Opposite to that ...
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15 votes
5 answers
5k views

Should I worry about people disabling Javascript?

Often when picking new tools and frameworks I see the warning "Will not work if the user has disabled Javascript". I then look at my Javascript powered slideshow, Javascript powered menu, and ...
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  • 574
7 votes
3 answers
2k views

How do I prevent Google from indexing text that is generated by JavaScript?

Google is executing the JavaScript on my password creator website and indexing the random passwords that get generated by the JavaScript. The random text that is generated could look spammy to Google ...
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6 votes
4 answers
870 views

Will JavaScript (document.write) content be indexed by search engines?

I have an external JS file embedding some content inline in a web page. Basically it just does a document.write("my content") via a script tag and loaded externally with the src attribute. Any ...
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  • 163
6 votes
3 answers
5k views

How do I stop Google from indexing AJAX calls within Javascript?

We are getting a number of odd results come up on Google EG: http://www.somedomain.com/somepage/AjaxFunction.aspx?stuff=XXX&other=XXX When I looked at "somepage" the ajax function is not ...
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5 votes
1 answer
940 views

How to overcome politics of the net (Google translate code refuses to work from a specific region)

According to the FAQ's I am not sure if my question is a ok to ask or will be closed or should I post it in the meta or even I would blame some one for downvoting it. However it is one that has been ...
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  • 123
5 votes
2 answers
204 views

Can I declare a duplicate page via javascript for google?

Most sources of documentation state that one can declare a webpage a duplicate of another by applying this tag on the duplicate page: <link rel="canonical" href="(absolute URL to original page)"&...
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5 votes
2 answers
2k views

Is it cheating to serve different versions of the same content to users and crawlers?

I have a "smart" template for my website. For human users, the server renders the page content on the initial hit, but subsequent pages are loaded like an SPA. For a crawler, every page is rendered at ...
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3 votes
2 answers
496 views

Does Google count external Javascript or CSS files as backlinks?

Is there any information available on whether search engines (Google) count external Javascript or CSS files as backlinks? Example: Does loading FontAwesome from their CDN count as a backlink for ...
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  • 133
3 votes
1 answer
418 views

SEO for importing the page header with JavaScript rather than PHP

My website has the same header/sidebar/footer on every page, so I have been importing them using PHP. To do this I forced all html files to be processed through the apache servers PHP handler via ...
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3 votes
1 answer
399 views

Collapsible menu and amount of links in a web page

One of my pages contain three levels of a collapsible menu (JS + CSS from mycssmenu.com). There are a dozen first level items displayed to users, each one with various second level items, and finally ...
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  • 245
2 votes
1 answer
179 views

Can writing a floating navbar's HTML at the bottom of the page increase SEO?

In my entry into SEO (and admittedly the subject is in constant change) I had read SEO Warrior. In that book it explained the concept of increasing a page's SEO value by placing navigation at the ...
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  • 181
1 vote
1 answer
249 views

Pagination without pagination URLs - is it bad for SEO?

I've read a few articles about pagination pitfalls but none really describe my situation. I have a products page rendered with ReactJS with about 300 products and pagination (I am also using server-...
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  • 135
1 vote
3 answers
853 views

Will my new HTML5 website decrease my Google ranking?

I have a traditional HTML website that loads pages/sections of the site when people click on menu items. Pretty standard. Currently, I'm working on relaunching my website with a brand new HTML5 code &...
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92 votes
2 answers
713k views

How do I open the JavaScript console in different browsers?

Web browsers provide a JavaScript console as part of their developer tools. This console is useful for the following reasons: Errors and warnings that occur on a web page are logged into the console. ...
20 votes
8 answers
8k views

Is inline JavaScript good or bad?

I've currently switched from WordPress to Yii framework and an external developer is rebuilding my site. One thing I notice is that each time he invokes AJAX / jQuery the Yii way, it embeds inserts ...
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  • 489
30 votes
5 answers
8k views

Why insert static files (CSS, images, JavaScript, ECC) in a subdomain?

Why so many big and little sites inserts static files (CSS, images, JavaScript, ECC) in a subdomain like media.example.com or s2.static.example.com? What are the advantages? Why not just a directory ...
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  • 401
4 votes
1 answer
5k views

Dictionary API for a website?

I would like to have a dictionary for my website where the user can easily fill in a word or better yet right click a word and get the definition right there on the page or something along those lines....
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  • 2,026
15 votes
5 answers
6k views

What's the best way to load Javascript into a page to optimize performance?

Is there a way to load my JavaScript into a page that will make it load faster?
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  • 2,158
11 votes
2 answers
584 views

Google indexing pages with #! although we don't have any

Our company has developed a Single Page Application using AngularJS and its routing. Google indexed our site decently with JavaScript but it did not index some pages very well so we have developed an ...
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7 votes
3 answers
5k views

Would redirecting to a new home page affect SEO?

I'm currently working on a new landing page for this site. I want the landing page to replace the existing front page of the site. However I don't want to lose the Page Rank of the current front page -...
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  • 183
4 votes
2 answers
243 views

Is making AJAX site crawlable AND degrading gracefully with JS turned off possible?

According to this spec, making AJAX site crawlable by Googlebot means that you have to use hashbang (#!) links in it which means it won't degrade gracefully when JS is turned off. This might mean that ...
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  • 133
6 votes
3 answers
36k views

Possible to only load specific div of a website?

I have this project I'm working on and id like to add a really small list of nearby places using Facebook's places in an iframe feature from touch.facebook.com. I can easily just use touch.facebook....
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  • 181
6 votes
3 answers
425 views

Best approach to have Google index content primarily generated by Javascript

I'm developing an app where customers can drop in a Javascript tag onto their website, and it will generate content. What is the best approach to have Google index this content and associate it with ...
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4 votes
1 answer
3k views

Does using onclick on div's effect SEO?

I have a few elements on my page that uses onclick as the link, e.g: <div class="service" onclick="location.href='<?php echo $fields->service_1_link; ?>'" style="cursor:pointer;"> &...
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  • 1,522
4 votes
3 answers
5k views

Will using tabs with JavaScript (jQuery) hurt my SEO because of crawlability?

I have a page with tabs like this: http://www.problemio.com/problems/problem.php?problem_id=180 See how there are 3 tabs? Only the content from one of them shows up when the user lands on the page, ...
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  • 1,264
4 votes
2 answers
530 views

How can I get Google to index content that is written into the page with JavaScript?

I have a website that focuses on charts and graphs. The graphs on the site are drawn using JavaScript, but contain keywords that I would like to have indexed. For example, here is a screenshot of ...
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3 votes
1 answer
5k views

How do I use the ga() function in Google Analytics when the tag is in Google Tag Manager: Uncaught ReferenceError: ga is not defined

I'm following this: But in my real code, I've used google tag manager to manage google analytics. So I have just one script in the head of my website which belongs to gtm: (function(w,d,s,l,i){w[l]=...
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  • 393
3 votes
1 answer
2k views

Hide email adress with JavaScript

I read somewhere that hiding email address behind JavaScript code, could reduce spam bots harvesting the email address. <script language="javascript" type="text/javascript"> var a = "Red"; ...
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  • 133
9 votes
1 answer
18k views

Is it necessary to specify content-type in http response header?

Except for the html document, currently all the files (css, javascript and images) served from my web server do not specify the content-type in the http response header. I happen to notice this as I ...
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5 votes
1 answer
1k views

Does Googlebot trigger onclick events and index the resulting content?

I've found many topics about Googlebot following links and executing ajax queries but none that tell me whether onclick events would get triggered and results crawled. Let's say that an image is ...
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  • 153
5 votes
1 answer
1k views

Server-side rendering for search engines only (SEO)

I have a heavily JavaScript based web app which I want to make it indexable. I know that google bot and others agents can already see JavaScript, but I don't trust they will capture my content ...
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  • 147
4 votes
1 answer
1k views

How to inform Crawler on AngularJS permanently moved page without losing SEO ranking

I am using Angular JS app and serving snapshots for crawlers when they visit. Changes are inevitable and hence certain pages are to be moved permanently (Redirect 301). For example: www.domain.com/#!...
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  • 73
4 votes
2 answers
75 views

Google Bot seems to often fail at loading jQuery?

I am using Google Search Console's "Test Live URL" function to see if Google crawler can correctly read my pages. I find out that for a single page 3 out of 5 tests will return a lot of ...
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  • 485
3 votes
2 answers
762 views

Do I need to add the Google Tag Manager if I already have Google Analytics?

I have google analytics in my website like this : <!-- Global site tag (gtag.js) - Google Analytics --> <script async src="https://www.googletagmanager.com/gtag/js?id=UA-xxxxxxxx-1"></...
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3 votes
1 answer
663 views

Should I use the 'noreferrer' attribute on my website links (to open in a new window) as a safety measure?

There are many sites on the internet that recommend you to add the noopener noreferrer attributes to your link as a safety measure. This is to avoid malicious scripts from other domains to take ...
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3 votes
2 answers
1k views

How can I create links in javascript that are crawlable by search engines?

If I use JavaScript + jQuery, for example, does links inserted in $(document).ready() will be available for crawling? How can I insert crawlable links in JavaScript?
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3 votes
2 answers
806 views

Google JSAPI Auto-Loading

When using Google's JSAPI Auto-Loading system - is there a way to get the returned file with all the JavaScript (combined) in one HTTP request? At the minute is just calls the load routines (with ...
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  • 3,633
3 votes
1 answer
3k views

Can I reposition AdSense ads with Javascript (for responsive purposes)?

I have a responsive blog where ads are displayed in the sidebar. On mobile devices however, the sidebar is pushed to the bottom below the posts. So what I'd like to do is move the ads from the ...
user avatar
  • 263