html-validation

Why "alt" attribute for <img> tag has been considered mandatory by the HTML validator .. ?

Is there any logical or technical reason (with the W3C validation) for making alt as required attribute .. This is my actual problem:though my page is perfect enough with respect to W3C validation rules .. Only error I am getting is line XX column YY - Error: required attribute "ALT" not specified I know the significance of "alt" att...

Is there an XHTML-compliance validator implemented in JavaScript?

As a step in our automated-testing, we're considering spidering our site and running each page through an HTML validator to validate against our doctype. However, there are many JavaScript DOM-manipulations happening. So we had the idea that there might be an HTML validator written in JavaScript that we could use. Even if it's just so...

Help with HTML validation error: Table column has no cells beginning in it.

Please help me with this validation error. I can't understand what it means or what's not standards complaint with my HTML. I'll repost it here since hopefully I'll fix it and that link will no longer work: Table column 2 established by element td has no cells beginning in it. …="tooltip_table"><tr><td colspan="2">20 yd range</td></tr...

Is there a way to create a custom HTML validation schema for Visual Studio?

Is there a way to add custom HTML validation schemes to Visual Studio? If so, is there a resource to download schemes? Note IE6 validation is there as a painful reminder ...

Running Eclipse's "HTML syntax validator (for php files)" on command line

I'm looking for a tool / script which validates the template files (php variables + html is mixed). I have tried 'tidy' but the results are not consistent as Eclipse and moreover Tidy doesn't handle such dynamic template files very well. So can anyone point me out in right direction? ...

Is it really necessary to have a competely validated Mark Up and css for SEO purposes

Hi , While validating my CSS on http://jigsaw.w3.org/css-validator/ I am getting following errors: 1.Property zoom doesn't exist : 1 1. 2.Property -webkit-transition doesn't exist : all 200ms ease-in all 200ms ease-in 3.Property opacity doesn't exist in CSS level 2.1 4.Property -moz-border-radius doesn't exist 5.Property -webkit-b...

How should I validate HTML in Django templates during the development process?

I haven't used Django's and Python's built in testing capabilities yet, but I want to finally start... And one of the most obvious things that I'd like to keep in check during the entire development process is that all my pages validate in all possible scenarios. What's the best way to do this? ...

jQuery: how to pass event metadata on HTML elements while maintaining XHTML validity?

I'm sure a lot of you have come across this dilemma at one time or another: I have a block-level HTML element that contains multiple block-level and inline-level elements, e.g. <div id="ajax"> <h2>Something</h2> <div class="icon"></div> <div class="clear"></div> <div class="somethingelse"><h3>blah</h3></div> </div> I simp...

Editor or IDE supporting django templates and HTML/CSS validation?

Is there a IDE that supports editing django templates and that is able to validate HTML and CSS? Requirements: be able to detect and highlight errors in CSS, example: forgot to close "}", or invalid css attribute be able to make it learn new css attributes (like css3 ones or browser specific ones) - we don't want to see them invalidat...

Is it invalid HTML to write "&" by itself? Why?

Possible Duplicate: Do I really need to encode '&' as ' &amp;' ? I know that W3C recommends to "use "&amp;" (ASCII decimal 38) instead of "&" to avoid confusion with the beginning of a character reference", and that tidy warns of an "unescaped & which should be written as &amp;" but, these warnings not withstanding, is it vali...

How to auto check specific websites for errors with Chrome or Firefox extension?

I'm looking for a Chrome or Firefox extension that will auto validate your webpages from specific URLs. I don't want to auto-check everything I browse, only the specified URL patters or domain names. The validation doesn't have to be perfect, but has to be pretty fast and find things like missing images, css or js files. JavaScript ...