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.
39
votes
16answers
1k 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 ...
23
votes
5answers
2k views
Does “putting Javascript at the bottom” defeat the purpose of document.ready?
I know that it is recommended to put Javascript at the bottom of the page, but if I'm using jQuery doesn't this defeat its purpose to run as the DOM is loading?
If I have a dropdown menu, for ...
22
votes
5answers
521 views
How can I reduce the costs of loading large JS libraries?
If I am using a large Javascript library for my page, how can I make sure that this does not impair the user's use of the site?
19
votes
1answer
737 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 ...
18
votes
4answers
393 views
What documentation exists for HTML, CSS, and JavaScript?
PHP users have the PHP.net docs
Ruby users have Ruby-Doc.org
Python users have docs.python.org
jQuery users have docs.jquery.com
All are considered go-to references when working within those ...
17
votes
4answers
985 views
Why insert static files ( css, images, js, ecc ) in a subdomain?
Why so many big and little sites inserts static files ( css, images, js, ecc ) in a subdomain like media.example.com or s2.static.example.com ?
What are the advantages ?
Why not just a directory ...
16
votes
6answers
2k 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 ...
16
votes
4answers
8k 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 ...
15
votes
1answer
47k views
How to open the JavaScript console in different browsers?
Updated on October 7th 2012
Chrome:
Press either CTRL + SHIFT + J to open the "Console" tab of the Developer Tools.
Alternative method:
Press either CTRL + SHIFT + I or F12 to open the ...
14
votes
7answers
1k views
What should I use to automatically combine css/js files?
I'm aware of sprockets for combining javascript files, but haven't tried it. What are some other options and how do they stack up?
13
votes
5answers
1k 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?
12
votes
4answers
15k 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?
11
votes
5answers
2k 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 ...
11
votes
4answers
943 views
Loading main javascript on every page? Or breaking it up to relevant pages?
I have a 700kb decompressed JS file which is loaded on every page. Before I had 12 javascript files on each page but to reduce http requests I compressed them all into 1 file.
This file is ~130kb ...
11
votes
4answers
2k views
Should I combine js/css files into a single file?
Both YSlow and Google's Page Speed add-ons recommend combining script (and style) files into a single file each to reduce the number of HTTP requests, and I can certainly see the point of this when ...
11
votes
5answers
264 views
Should JavaScript referenced in the head section be served from the same hostname as the main document?
I was under the impression that for the best performance, Javascript should be treated as static content and served from a cookieless domain along with CSS files, images, etc.
But Google says here: ...
11
votes
1answer
132 views
What is the benefit of using Google Analytics' asynchronous tracking code compared to the non-asynchronous code?
What, specifically, does the asynchronous code accomplish or allow that the older code does not?
10
votes
3answers
2k views
Does the Google spider render JavaScript?
Does the Google spider knows how to render JavaScript, or only HTML?
10
votes
1answer
2k 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 ...
10
votes
1answer
271 views
When and when not to use a CDN
I'm working on a web-application that loads a couple of small gif images onto the screen. I'm using a relative path, which means they are loaded from the same web server that serves the php page. The ...
9
votes
5answers
199 views
What new cross-browser features can we use if we drop support for IE6?
My company is dropping support of IE6 and I just realize that we can use a set of great features.
Is there a list of CSS, Javascript features which we can use with IE6 RIP?
8
votes
9answers
376 views
How do I compress my JavaScript and/or CSS?
I know that there are ways to dynamically load it into the page, but if I want to compress my code so it loads even faster, how do I do it?
8
votes
2answers
118 views
Automated Website Testing/Sanity/Quality
I am thinking about building a tool that starts from the root of a webpage and traverses the entire website gathering a list of resources such as CSS/HTML/Javascript files and then runs CSS/Javascript ...
7
votes
9answers
1k views
prototype.js or jQuery for new projects?
Should I use prototype.js or jQuery for a new project? Rails comes with prototype.js but jQuery seems the library of choice for the rest of the world. Is prototype.js still under active development? ...
7
votes
6answers
414 views
Font resizing widgets: worth it?
I see some text-heavy sites implement the little JavaScript widgets that allow you to choose smaller or larger text sizes on sites. (e.g.: as described on the Guardian's website)
Are these little ...
7
votes
8answers
2k views
Why not AJAX'ify entire websites?
Is there any solid reasoning as to why sites shouldn't be developed with ajax functionality that loads major parts of each part (assuming there are elements like the header, navigation etc that remain ...
7
votes
4answers
342 views
Who Is Against CSS and JS?
I know there is a group which promotes very basic HTML. They advocate against CSS and JavaScript. Does anyone know the name of this group?
Just to be clear this was a website, or a foundation, or a ...
7
votes
7answers
909 views
Can anyone list some real examples of 'HTML5' being used in the wild?
I am using HTML5 in the same way everyone seems to be using it these days, meaning: HTML5 tags, Canvas / 3D / javascript and CSS3.
I am struggling to find examples of sites that are using these ...
7
votes
3answers
334 views
Directory structure for a website (js/css/img folders)
For years I've been using the following directory structure for my websites:
<root>
->js
->jquery.js
->tooltip.js
->someplugin.js
->css
->styles.css
...
7
votes
3answers
3k views
How does redirects 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 ...
7
votes
2answers
1k views
What are the differences between Firefox's Javascript engine and Chrome's V8?
I've noticed that Chrome and Firefox take different amounts of time to render certain things. In general, Chrome has been faster. What should I know about both of them (and IE8/9, too, I guess) when ...
7
votes
1answer
153 views
Does adding external images or javascript to a website affect its SEO?
When adding images to your site, is it bad to use an image located on another site:
<img src='http://www.some_other_site.com/image.jpg'>
The same goes for javascript, is it bad to link to ...
7
votes
3answers
2k views
Upload image file: is compression on client side already possible?
When offering photo file uploading, usually the user will have badly compressed and huge (10+ megapixels) JPEG files from their cameras or phones. On the server side, these files will get ...
6
votes
4answers
722 views
Something like firebug for internet explorer?
Is there something like Firebug for Internet Explorer? I've got a site that is only supposed to be working in IE so I'm only targeting IE and the site is not supposed to work in Firefox.
6
votes
3answers
7k views
Why would you use document.location.protocol instead of plain // prefixed urls?
For instance Google Analytics uses document.location.protocol in the boilerplate for tracking:
<script type="text/javascript">
var _gaq = _gaq || [];
_gaq.push(['_setAccount', ...
6
votes
3answers
671 views
Multiple google analytics instances on a page?
My company creates (and hosts) sites for many different clients. We allow clients to send us tracking code, including Google Analytics, and we put them on the page.
We would also like to include our ...
6
votes
1answer
176 views
If all content is on a single page and hidden/shown with JS would it make sense to use hashbangs?
I have a page where the general structure is
<a href="#section1">section 1</a>
<a href="#section2">section 2</a>
<a href="#section3">section 3</a>
<a ...
5
votes
2answers
341 views
Which is better, minified or obfuscated code?
I’m confused between the two. Which is better, especially for jQuery and JS? Also, which do you think is more SEO-friendly? Note: I’m a noob.
5
votes
4answers
270 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 ...
5
votes
1answer
112 views
Repeated calls with random Javascript append to the URL
I keep getting calls to my server where there is random Javascript appended on the end of lots of the calls, e.g.:
/UI/Includes/JavaScript/).length)&&e.error(
...
5
votes
1answer
482 views
Text limit on analytics event code
I am just about to add the event code a button that downloads the pdf.
Event code fields:
_trackEvent(category, action, opt_label, opt_value, opt_noninteraction)
Example of event code:
...
5
votes
2answers
1k views
JavaScript based Audio player.
I am trying to find an Audio-Player, javascript based. I have tried a bunch of them, but was unable to find one with "Analytic", "Caption", "Control-Bar" etc other features.
Can I have some ...
5
votes
5answers
2k views
Free search tool for static website
I am looking for a free search tool for a website hosting html documentation files. the tool should display the results as listings of page title and few lines of text from that page. It should also ...
5
votes
1answer
458 views
Looking for a desktop application similar to jsFiddle
Is there a desktop application or IDE for Windows or GNU/Linux similar to jsFiddle where I can insert my JavaScript code, HTML and CSS and see how it executes?
I don't mind writing HTML, CSS and ...
5
votes
1answer
258 views
Monitoring GWT Website
We currently monitor our webapps using curl. More and more of our webapps use the GWT framework, which uses tons of javascript, and we can't rely on our curl system to monitor anymore. Therefore, we ...
4
votes
4answers
428 views
Protect js code from being stolen
I have developed an web app with jquery,html-css markup which would be an premium web app. So I have to ensure the security of the code from being stolen.But as all these are client side,so there is ...
4
votes
3answers
769 views
How do search engines handle <noscript>?
On my site, I have something like the following:
<noscript>
<p>
<strong>JavaScript is currently disabled.</strong>
Please enable it for a better ...
4
votes
3answers
173 views
Why do many websites have so many javascript includes?
I notice this is the case mainly for rather sophisticated pages. However, why don't developers simply combine the JS files and condense it all together? Is it not a more efficient method, in terms of ...
4
votes
2answers
524 views
Does placing Google Analytics code in an external file affect statistics?
I'm working with an outside software vendor to add Google Analytics code to their web app, so that we can track its usage. Their developer suggested that we place the code in an external ".js" file, ...
4
votes
3answers
225 views
Which jQuery slider do you suggest?
I need a slider like this one . As you can see when it's on the last part, and is needed to show the first again, it scrolls fastly to the left. I want a slider that doesn't have this behavoir. What ...
