CSS, SCSS, LESS support for Sublime's LSP plugin provided through VS Code's CSS language server.
LSP-css
from Package Control.
If you use Sass install Sass.
If you use Less install LESS.There are some ways to configure the package and the language server.
Preferences > Package Settings > LSP > Servers > LSP-css
Preferences: LSP-css Settings
I'm getting duplicate suggestions in the completion popup.
Sublime Text comes with a plugin that provides completions for the CSS and HTML syntaxes. This results in duplicate completions when using this package.
To disable ST's built-in completions for CSS syntax, for example:
Preferences: Settings - Syntax Specific
from the Command Pallete
"disable_default_completions": true
in the view on the rightRepeat for other syntaxes that provide built-in completions. Same applies to third-party SASS package that provides SASS and SCSS support.