This detailed proposal from Miriam for scoping CSS is well worth reading—it makes a lot of sense to me.
In defence of the cascade (especially now that we’ve got CSS custom properties).
I think embracing CSS’s cascade can be a great way to encourage consistency and simplicity in UIs. Rather than every new component being a free for all, it trains both designers and developers to think in terms of aligning with and re-using what they already have.
Remember, every time you set a property in CSS you are in fact overriding something (even if it’s just the default user agent styles). In other words, CSS code is mostly expressing exceptions to a default design.
A beautiful piece of writing from Virginia Heffernan on how to cope with navigating the overwhelming tsunami of the network.
The trick is to read technology instead of being captured by it—to maintain the whip hand.
Monica explains how Shadow DOM could be the perfect answer for scoping CSS:
Although, in a way, Shadow DOM is also another flavour of CSS-in-JS: