import React , { FunctionComponent , memo , useRef , useState } from "react" ; import { useTransition , animated } from "react-spring" ; import { useOnClickOutside } from "@hooks/useOnClickOutside" ; import cn from "@sindresorhus/class-names" ; import SimpleBar from "simplebar-react" ; interface DropdownProps { label : ( isOpen : boolean ) => React . ReactNode ; isOpen ? : boolean ; contentClassName ? : string ; children : ( close : ( ) => void ) => React . ReactNode ; position ? : "left" | "right" ; } const _Dropdown = ( { label , isOpen = false , contentClassName , children , position = "start" } ) => { const [ isVisible , setVisible ] = useState ( isOpen ) ; const contentRef = useRef ( null ) ; const transitions = useTransition ( isVisible , null , { from : { opacity : 0 , transform : "translateY(8px)" } , enter : { opacity : 1 , transform : "translateY(0)" } , leave : { opacity : 0 , transform : "translateY(8px)" } , config : { duration : 200 } } ) ; useOnClickOutside ( contentRef , ( ) => setVisible ( false ) ) ; return ( < div className = "relative" ref = { contentRef } > < div onClick = { ( ) => setVisible ( ! isVisible ) } > { label ( isVisible ) } < /div> { transitions . map ( ( { key , item , props } ) => item && ( < animated . div style = { props as any } key = { key } className = { contentClassName } > < SimpleBar className = { cn ( "dropdown-content" , { right : position === "right" } ) } > { children ( ( ) => setVisible ( false ) ) } < /SimpleBar> < /animated.div>))} < /div>); } ; export const Dropdown = memo ( _Dropdown ) ;