Allow dismissing tooltips and popovers with the Escape key

[mdo]

Closes #39692.

What

Tooltips (and popovers, which extend them) can now be dismissed by pressing the Escape key while shown, helping satisfy WCAG 1.4.13 “Content on Hover or Focus”, which requires hover/focus content to be dismissible.

The behavior matches the Menu/dropdown component's existing Escape handling, including inside a dialog: the first Escape closes the tooltip, and a subsequent Escape closes the dialog.

How

While a tooltip is shown, a keydown listener is attached on document in the capture phase. On Escape it calls preventDefault() + stopPropagation() and then hide() — the same approach as menu.js's dataApiKeydownHandler.

• Capture phase + document scope is required so the tooltip handler runs before the dialog's own handler, and so it works for hover-triggered tooltips (where keyboard focus isn't on the trigger. only uses the capture phase for delegated listeners, so the listener is attached natively.
• The handler is guarded on , and the listener is removed in and .

Verification

Beyond the unit tests, I verified in a real browser (Chrome) that a tooltip inside a **native modal ** () behaves correctly:

• 1st Escape → tooltip hides, dialog stays open (the native is suppressed)
• 2nd Escape → dialog closes

This is identical to how the Menu component already behaves in the same scenario.

Notes

• No changes are included; those are regenerated separately on this branch.
• Docs updated for both tooltips and popovers.

🤖 Generated with Claude Code
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[coliff]

• https://deploy-preview-42472--twbs-bootstrap.netlify.app/docs/6.0/components/popover/
• https://deploy-preview-42472--twbs-bootstrap.netlify.app/docs/6.0/components/tooltip/

Tested those with Firefox 151, Edge 148 and Safari 26.5 and all worked well with no issues.