Is it Safe to Use This?

HTML and CSS are in a constant state of flux. While many parts of HTML and CSS are considered stable and safe to use, there are parts that are not stable or that may not be well supported by browsers. Be sure to understand the potential problems when using parts and features that may not be stable (and thus may change in the future) or that may not be widely supported.

Recommended Links

• Can I Use
• MDN CSS reference
• MDN HTML reference