Creating a website with HTML5 and CSS3 without having to worry about using techniques like progressive enrichment and polyfills is the ultimate dream for modern-day front-end developers.
But unfortunately, mainly because of the widespread use of IE6-8, that is still just a distant dream. But it is getting closer.
I thought it would be a good idea to summarize where CSS3 stands as far as browser support goes, so you can feel comfortable making decisions about what to use or abuse when incorporating CSS3 into new projects.
This outline will be divided up into sections beginning with the safest CSS3 features to use, and going down the list towards the not-so-safe. Of course, in all cases, you have the option to declare fallbacks and polyfills that will give nonsupporting browsers a similar and/or acceptable experience. Just remember to take care that your content is accessible and your brand isn’t negatively impacted by any design decisions you make. Also, for the purpose of this article, I’m only taking into consideration A-Grade browsers.