Authoring practices tend to only specify keyboard interactions for patterns

[slauriat]

At the very least, patterns should change "Keyboard Interaction" to just "Interaction" for all sections and note that activation and selection needs support via the enter key and mouse up (to follow Success Criterion 2.5.2 Pointer Cancellation).

As one example, the combobox pattern does not specify what mouse/pointer interactions it should support.

• Should clicking on the textbox open the combobox?
• Should clicking away from the textbox (or blurring in any manner) collapse the combobox, similar to the Escape key behavior?
• Should clicking on an option select that option and collapse the combobox? That seems obvious, but the practices say only that enter selects options (or Escape, unless Escape clears out the textbox).