If you run your CSS files through Autoprefixer[1], it's possible to use the latest syntax, and have it automatically converted to all necessary older ones. [1]

If you run your CSS files through Autoprefixer[1], it's possible to use the latest syntax, and have it automatically converted to all necessary older ones. [1] https://github.com/postcss/autoprefixer https://github.com/postcss/autoprefixer