Being the language used in website designs, CSS is one of the language supported by Vim's auto-complete feature.
To start using the feature, enter the following while in Vim's command mode.
That will enable CSS auto-completion in Vim. To use it, press
Ctrl + x followed by
Ctrl + o while partially typing CSS codes.
The following is a sample screenshot.
You can use the arrow key to navigate through the list to choose your desired auto-complete suggestion.
To automatically enable CSS auto-complete every time opening a CSS file, add the following line to your
autocmd FileType css set omnifunc=csscomplete#CompleteCSS