Is it really necessary to have a balanced Mark Up and CSS score for SEO purposes

When checking my CSS at http://jigsaw.w3.org/css-validator/

I get the following errors:

1. The object of scaling does not exist: 1 1.

2.Property -webkit transition does not exist: all 200 ms ease in all 200 ms ease

3. Opacity opacity does not exist in CSS 2.1

4.Property -moz-border-radius does not exist

5.Property -webkit-border-radius does not exist

Does MarkUp and CSS really need to be fully tested for SEO, or are these errors, which are mostly browser dependent, can be ignored for now.

If these errors need to be removed, someone may also suggest a way to do this.

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css seo html-validation css-validator
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3 answers

CSS errors have no effect on SEO. HTML errors may have a tiny effect ribbon, but if your markup is not so bad, the parser cannot extract text from it (in which case it probably doesn’t even work in the browser), it won’t have any negative effect. Confirmation is a nice touch from a programming point of view, but in my experience, practicality surpasses it every time, especially with CSS.

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If for any reason you need a page to check (for example, so that the client is happy), but you also need to use non-standard properties for your page, you can do this by adding them dynamically using javascript so that the validator does not pick them up!

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SEO and valid source code (W3C validation) @ searchenginejournal.com.

This article and comments are very insightful.

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