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Why do you need the "Valid XHTML & CSS" ad at the end of the page

I saw this in the footer of various websites, most of which are non-technical websites. Some websites go even further and include the W3C badge that says so. I do not see how this can provide any assistance to the target audience.

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13 answers

I can think of several possible reasons:

  • It could be a marketing tool. "Listen, we select the appropriate standards!" This may apply to the person who designed the site (and may include it in his portfolio), even if the company as a whole is non-technical.

  • It can be a means of disseminating information about XHTML and others. "You must also code the relevant standards!"

  • This can improve the perception of quality for the site as a whole (and, possibly, company products, by combining). I really don't think this is particularly likely, but some marketing departments can.

  • As others have noted, this may just be the pride of a web designer.

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Honestly, I think this is just made to boast. "Hey look, my site uses valid XHTML!" In fact, it serves no purpose other than to show that it has been well encoded.

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This is a sign of pride. I don’t necessarily think that I agree with plaster sites with verification iconography, but I strongly believe in coding standards. Networking is a much less difficult place to work than before, due to the hard work of W3C and others.

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In most cases, this icon is a link to an automatic verification task running against the referring site. This is an invitation for the audience to carefully study the quality of your work.

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This does not serve any useful purpose. Just because the site meets the requirements of xhtml, this does not mean that it is well encoded. It just means that the developer takes care of whether the site is xhtml or not.

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This usually means that there is JavaScript that adds target attributes to the links after the page loads.

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I will add two more John Hyland answers:

  • By stating that the page / site is well-formed, he can state that it can be more easily analyzed by third parties.
  • For reusable content (such as Creative Commons licensing), it reports that the code can be copied / pasted or included without violating W3C compliance.
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I'm fascinated by what people put in the footer. There are all kinds of garbage. Sometimes there is even navigation, which, as I would like, was at the top of the page. Example:

/fooobar.com / ... | serverfault.com

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I also saw sites with the W3C badge that actually fail the test.

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This is not so, in my opinion, many web designers have expressed this as a sign of quality on the site. Sometimes making a good site XHTML-compliant is no easy task.

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People usually set the valid below to show that their website is a complaint about the W3C standards for building websites. If the website does not work correctly and does not have the correct link or image below, then it is probably poorly written. By verifying your website through W3C, you will ensure that you have correctly encoded your pages.

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The W3C HTML validator and CSS validator contain link code for displaying banners that have markup and CSS.

Basically, to tell you that the authors really bothered to make sure XHTML and CSS are valid.

Unfortunately, syntax without errors does not make it a logical mistake.

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Short answer : you DO NOT LIKE the web page.

Any reason why it was put is subjective to the author of the page and does not really concern you.

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