36
votes
Is using nested spans in HTML 5 valid?
Nesting span tags is valid HTML.
A span tag is non-semantic markup intended for grouping inline content, and is a valid wrapper for phrasing content. This includes tags like strong, em, time, and etc,...
- 461
8
votes
Accepted
Is using the <u> tag invalid or bad for SEO?
The reason it was marked invalid is because it was deprecated, i.e. at the time you tested it was no longer part of the current HTML spec.
It's now been reintroduced to the HTML5 spec, albeit with a ...
- 7,785
6
votes
Accepted
Is using nested spans in HTML 5 valid?
This looks like a job for a div:
<div class="fake-input">
<span id="fake-input"></span>
<span id="deftext">No file selectedspan</span>
</div>
If you wanted to ...
- 5,204
5
votes
Accepted
Google Structured Data Testing Tool Repeat Error: "The URL could not be rendered. Some markup may be missing."
After:
isolating error triggers
assessing what all the error triggers had in common (they all referred to external .svg files)
The answer is:
Google Structured Data Testing Tool doesn't yet know ...
- 2,325
2
votes
Should I ignore W3 CSS Validation Service?
W3C errors (css or html) increase the chances of your site not rendering correctly across all devices.
You should worry about the css errors and get them fixed.
There is an awesome W3C Validator ...
- 110
2
votes
Validating emails
The first step would be to do a check on the domain to identify the mail exchangers using the command...
nslookup -q=mx domain.com
You should receive a response similar to...
Non-authoratative ...
- 10.2k
2
votes
Accepted
Are better SSL certificates (better type or better encryption) better for SEO?
There are lots of websites that provide free SSL certificates (like cloudflare, letsencrypt, google firebase and blogger.com (Only for their blogs), Wordpress.com (Only for their blogs)...) and ...
- 5,507
2
votes
Accepted
What's the technical name of the captcha like thing which asks you to identify all the 'ice-cream' pictures?
This kind of spam prevention is usually provided by the reCAPTCHA service from Google. IMHO this is an advanced spam protection service based on the principles of CAPTCHA. While I do not think ...
- 206
2
votes
Is there a reliable broken links check for https websites built with angularjs?
Try Screaming Frog - it can crawl hashbang-ed urls:
http://www.deepcrawl.com and http://www.crawlajax.com promise to be able to it too.
- 10.1k
2
votes
Can I use <icon> element in HTML5? It fails the W3C validator
Two things:
Include a reference link in your <head></head> the same way you
would link your CSS file:
<link rel="stylesheet" href="https://fonts.googleapis.com/icon?family=Material+...
- 890
1
vote
Accepted
BIMI SVG validation error
Solved!
I used all the SVG conversion tools listed and still it failed validation.
It turns out that Wordpress was stripping the baseProfile tag from the SVG file, causing it to fail validation. I'm ...
1
vote
How would search engines notify us about errors with live sitemaps?
There are a few search engines which have a management interface that address situations like this. They are normally named in the format of "(search engine name) webmaster tools". For example, in ...
- 13.6k
1
vote
W3C validation error: aria-controls attribute must point to an element in the same document
I was able to solve this issue by replacing the aria-controls value with the id of the nav element. Works and passes validation.
- 19
1
vote
HTML validation: is it worth it?
Google and Bing do not, have not and will never use CSS or HTML validation as a ranking factor.
The majority of websites have dozens to hundreds of errors and you need not worry about them because ...
- 32.9k
Only top scored, non community-wiki answers of a minimum length are eligible