A short description on hover or focus, which must never be the only place information lives.
CMP·013Component · Overlays
Tag3 entries across 2 sections
tooltips
Entries tagged tooltips, drawn from across the library. Tags cut through the section structure, which is where most of the useful connections are.
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3 entries
Explain the thing that cannot be made obvious, and put the explanation where the decision happens.
WRT·015UX writing · UX writing
Content that appears on hover or focus must be dismissible, hoverable and persistent.
A11Y·018Accessibility · Perceivable