A recent tweet from Google’s Gary Illyes called attention to problem of invalid HTML. Google is fine with invalid HTML. Less well known is that there are negative outcomes associated with invalid HTML ...

Many top websites have invalid homepage HTML, yet still rank well. Machine-readable elements must be accurate, even if the rest of the HTML isn’t. SEO success depends on user-focused strategy, not ...

HTML5 offers form field validation support built into the HTML form input tags that should greatly reduce the need for JavaScript validation code. In this post, I look at some examples of this.

However, not every browser supports HTML5 as of the date this is posted. So, you should avoid using HTML 5 specific tags until it is universally supported, otherwise you might end up adding alternate ...