What is <hr />? Basically, it is an old HTML-tag which has been used since the very beginning of the Web. hr stands for the horizontal rule and represents exactly what you would expect — a horizontal line or a horizontal divider. By default, web browsers render hr as a simple horizontal line. In terms of semantics the tag is supposed to clearly separate content blocks. This is often used in design of footers, but also makes sense in other situations — for instance, if you want to separate two blog posts or make the divisions within the content structure sharper…