Since the inception of CSS in 1994, the cascade and inheritance have defined how we design on the web. Both are powerful features, but as authors we’ve had very little control over how they interact. Selector specificity and source order provide some minimal “layering” control, without a lot of nuance – and inheritance requires an unbroken lineage. Now, CSS Custom Properties allow us to manage and control both cascade and inheritance in new ways.
See the Pen Custom Property Cascades (sass function) by @miriamsuzanne on CodePen.
Keep selector conflicts to a minimum
The new @scope rule is here! It’s a better way to keep our component styles contained – without relying on third-party tools or extreme naming conventions.
A new proposal for importing from NPM packages in Sass
UI libraries like Vuetify and Bootstrap make it easy to extend their themes by providing Sass source files with their NPM packages. Now, Sass is requesting feedback on a simpler way to import those libraries into your Sass styles with e.g. @use "pkg:bootstrap".
Giving us control over the cascade
Don’t let specificity force you into strict selector conventions. Cascade Layers allow us to manage specificity without resorting to naming hacks or the !important flag.