Big news for frontend developers 🎉
With Firefox 146 officially supporting the @scope at-rule, CSS @scope is now available across Chrome, Safari, and Firefox — earning the Baseline: Newly Available status.
Why this matters 👇
The @scope at-rule introduces a new way to scope CSS styles to a specific part of the DOM, helping reduce global CSS conflicts and making styles more predictable, modular, and maintainable.
What is @scope in CSS?
• @scope defines a local styling context
• :scope represents the scope root
• Styles apply only within that defined boundary
• No more over-specific selectors or CSS leakage
Key Benefits ✨
✅ Better CSS organization
✅ Reduced specificity wars
✅ Safer component-level styling
✅ Cleaner, more maintainable stylesheets
✅ Perfect fit for design systems & component-based UI
Where can you use @scope?
You can use @scope in linked CSS stylesheets and inline style blocks, including cases where inline usage introduces some interesting behaviors.
By default, CSS is globally scoped, even when rules appear to be nested inside elements like main.
@scope changes this by enabling true contextual styling without relying on heavy or deeply nested class naming conventions.
This represents a significant improvement in modern CSS architecture and is an important feature for frontend engineers who focus on scalability, performance, and long-term maintainability.
Practical Use Cases of CSS @scope and How to Implement Them.
Scoped Style Code
Scoped within section or Component Style Code
Exclude Scope within parent section Style Code
Exclude Scope for a specific section Style Code
Section or Component Based Style Code
Have you started using @scope yet?
Would you adopt it in production today, or would you prefer to wait a bit longer?
Top comments (6)
A tip: instead of adding images to show the code use code blocks or embed codepen urls. That way people can copy the examples or make the font bigger.
I added it intentionally because I want readers to actively engage with the content by writing the code themselves rather than copying and pasting it. This approach encourages hands-on practice, which helps reinforce learning and makes the concept more memorable over time.
That makes no sense. For as long as I know even books provide a zip file or a repository with code.
And now you even changed the images so that the code is even smaller than it was before, just because you want to show a bezel with an arrow?
None of your code is useful to copy paste in any website as it is. The main goal of having text is to make it easy to test it out.
Because you don't want to provide code I will, @scope MDN
I added images with titles for each use case to improve understanding. If this affects readability for users, I can convert the content into code blocks instead of using images.
You missed the readability hint in my first comment, and now you picked it up.
Yes code blocks offer more than just copy-paste content.
Thank you for the feedback. Since accessibility should not be compromised, I have also added relevant code blocks alongside each visual reference to provide clearer context and better understanding.