popover

overlay, popup, popover, dialog, toast, notification, suggestion, picker

hint - Ephemeral UI

menu/dialog

auto/(the empty string) - Persistent UI

创建一种新的/不同于 auto 的 popover stack

hovercards/tooltips

manual

allowing you to define the precise functionality and behavior you need.

文档

• Top layer
• popover(whatwg)
• popover api
• popover(MDN)
• light dismiss
• Popover = hint