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usePortal
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| import { | |
| createPortal as createReactPortal, | |
| unmountComponentAtNode, | |
| } from "react-dom"; | |
| import { useState, useCallback, useEffect } from "react"; | |
| export let usePortal = (el: Element = document.body) => { | |
| let [portal, setPortal] = useState<{ | |
| render: Function; | |
| remove: Function; | |
| }>({ | |
| render: () => null, | |
| remove: () => null, | |
| }); | |
| const createPortal = useCallback((el) => { | |
| let Portal = ({ children }: { children: Element }) => | |
| createReactPortal(children, el); | |
| let remove = () => unmountComponentAtNode(el); | |
| return { render: Portal, remove }; | |
| }, []); | |
| useEffect(() => { | |
| if (el) unmountComponentAtNode(el); | |
| let newPortal = createPortal(el); | |
| setPortal(createPortal(el)); | |
| return () => { | |
| newPortal.remove(); | |
| }; | |
| }, [el, createPortal]); | |
| return portal.render; | |
| }; |
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