CSS @property

Last reviewed Jun 1, 2026 Content v20260601

This lesson

This lesson teaches CSS @property—the ideas, syntax, and habits you need before moving on in CSS.

Without a solid grasp of CSS @property, you will repeat mistakes in CSS exercises and on real pages or scripts.

You will apply CSS @property in contexts like: All browser UIs, component libraries, marketing sites, and many native apps that reuse web views.

Read the lesson, edit HTML/CSS in the playground, press Run to preview, then answer the lesson MCQs.

When intermediate lessons feel comfortable and you are ready for production-style trade-offs.

@property registers typed custom properties so browsers can animate and validate them more reliably.

Q: Why use @property with variables?
A: Enables typed interpolation and predictable animation behavior.
Q: Key fields in @property?
A: syntax, inherits, and initial-value.
Q: Fallback strategy?
A: Ensure design works even if typed registration is unsupported.

Practice: Change one property in the playground and observe cascade + layout in DevTools.

Can you explain this lesson in 30 seconds without reading notes?

Self-reflection (saved on this device)

Not saved yet.

Runs in your browser in a sandboxed frame. Backend runners appear when this track’s profile allows them.

Multiple choice — immediate feedback.

Learner essays linked to CSS — not official lesson content.

Browse all stories

Past discussion is visible to everyone. Only logged-in users can post comments and replies.

Starter discussion topics

No discussion yet. Be the first to ask a question.

Jump