Div popover
summary/details popover
Text input pointing to hidden popover
Popover
Email input pointing to hidden manual
Manual
Popover=hint
Popover=hint Link
Text input pointing to non-popover
No popover attribute
Text input pointing to invalid popover value
Invalid popover attribute value

Showing/visible popovers below

Tel input pointing to showing popover Url input pointing to nested popover
Popover (showing)
Nested popover (showing)
Url input pointing to showing manual
Manual (showing)
Popover=hint (showing) Link