Someone in a comment below posted a link to Adobe Spectrum design system [0]. You will find similarly shaped tooltips in Shoelace [1], or shadcn [2]. The Popper

Someone in a comment below posted a link to Adobe Spectrum design system [0]. You will find similarly shaped tooltips in Shoelace [1], or shadcn [2]. The Popper library has it [3]. Github's design system has it (they call it popover) [4]. It's an extremely common design pattern. [0] - https://spectrum.adobe.com/page/tooltip/ https://spectrum.adobe.com/page/tooltip/ [1] - https://shoelace.style/components/tooltip https://shoelace.style/components/tooltip [2] - https://ui.shadcn.com/docs/components/tooltip https://ui.shadcn.com/docs/components/tooltip [3] - https://popper.js.org/docs/v2/modifiers/arrow/ https://popper.js.org/docs/v2/modifiers/arrow/ [4] - https://primer.style/product/components/popover/guidelines/ https://primer.style/product/components/popover/guidelines/