是否真的有必要使用经过验证的Mark Up和css进行搜索引擎优化

Question

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-border-radius doesn't exist

Is it really required to validate the MarkUp and CSS completely for SEO or these errors which mostly are browser specific can be ignored for now.

If these errors have to removed can someone please suggest the way to do so also.

Answer 1

CSS errors don't have any effect whatsoever on SEO. HTML errors may have a tiny sliver of effect, but unless your markup is so bad a parser can't take the text out of it (and in that case it probably won't even work in a browser), it won't have any negative effect. Validating is a nice touch from a programming perspective, but in my experience, practicality beats it every time, especially with CSS.

Answer 2

如果由于某种原因您需要页面进行验证（例如，为了让客户满意），还需要使用非标准属性让您的页面工作，您可以通过使用javascript动态添加它们来做到这一点，以便验证器不会接收它们！

Answer 3

SEO & Importance of Valid Source Code (W3C Validation) @searchenginejournal.com.

This article and comments are both very insightful.