Seonglae Chopopover - HTML: HyperText Markup Language | MDN
The popover global attribute is used to designate an element as a popover element.
https://developer.mozilla.org/en-US/docs/Web/HTML/Global_attributes/popover
Introducing the popover API - Chrome Developers
Learn how to build tooltips, menus, and more with the new popover API.
https://developer.chrome.com/en/blog/introducing-popover-api
