CSS Tooltips

Last reviewed May 28, 2026 Content v20260528

This lesson

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

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

You will apply CSS Tooltips 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.

Tooltips provide compact context but must remain readable and accessible for keyboard and touch users.

Pure hover-only tooltips are inaccessible on touch and unreliable for keyboard users; provide focus/aria support.

Q: Tooltip vs popover?
A: Tooltip is brief supplemental text; popover can contain richer interactive content.
Q: Common tooltip failure?
A: Off-screen clipping and unreadable contrast.
Q: Should essential instructions live only in tooltip?
A: No, critical info must be visible without hover discovery.

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

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