Checkbox
A choice that is on or off, alone or among independent options. Specification: docs/components/checkbox.md · shared anatomy: docs/components/choice.md
States
Indeterminate has no HTML attribute: set the indeterminate property in JavaScript (this page does it on load).
Hint and message
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Group
Horizontal
Size
data-size on the item or a container: a 16 / 20 / 24px box.
Edge cases
Includes page views, feature usage counts and session lengths, but never content or identifiers.