CSSNext and PostCSS

(light piano music)…- A big important topic to talk about in regards to PostCSS…is something called CSSNext.…Now, PostCSS is nothing more than a container…for CSS plugins,…that allows us to take current features…and allow them to work with older browsers,…or even to embrace brand new features…that aren't even standard yet,…and be able to use them in modern browsers…and older browsers as well.…

CSSNext is a collection of those PostCSS plugins,…that represent loosely the next generation…of CSS features that are coming.…Now, some of these plugins are very mature and stable,…they're stage three, stage two maybe,…some of these plugins are still experimental,…aspirational ideas,…stage zero, stage one.…Nevertheless, all of these plugins are…collectively referred to as CSSNext.…

Now, an important thing to understand about CSS is that…CSS is no longer a single bundled specification.…So there's no, like, you know,…there's no CSS4 coming out.…There are various version levels for different CSS features,…for example, the current version of CSS selectors…