A dropdown inside a modal gets cut off because the modal has overflow: hidden or a
z-index stacking context that traps the dropdown. CSS cannot easily escape parent constraints.
Renders content directly to <body> (or a custom portal root), completely escaping all
parent CSS constraints like overflow, z‑index, and positioning. Preserves event bubbling.
Dialog, Dropdown, Tooltip, Popover, Toast, Modal, HoverCard, Select, Combobox