konnoswithSticky.utils.ts53 lines · main
| 1 | import { useCallback, useRef } from 'react' |
| 2 | import { useInView } from 'react-intersection-observer' |
| 3 | |
| 4 | const useSticky = <Element extends HTMLElement>({ |
| 5 | enabled = true, |
| 6 | style = {} as CSSStyleDeclaration, |
| 7 | }: { |
| 8 | enabled?: boolean |
| 9 | style?: CSSStyleDeclaration |
| 10 | } = {}) => { |
| 11 | const stickyRef = useRef<Element>(null) |
| 12 | |
| 13 | const handleSticking = useCallback( |
| 14 | (inView: boolean) => { |
| 15 | if (!stickyRef.current) return |
| 16 | |
| 17 | if (inView) { |
| 18 | stickyRef.current.style.position = 'sticky' |
| 19 | stickyRef.current.style.top = '100px' |
| 20 | stickyRef.current.style.zIndex = '5' |
| 21 | |
| 22 | for (const property in style) { |
| 23 | // @ts-ignore |
| 24 | stickyRef.current.style[property] = style[property] |
| 25 | } |
| 26 | } else { |
| 27 | stickyRef.current.style.position = '' |
| 28 | stickyRef.current.style.top = '' |
| 29 | stickyRef.current.style.zIndex = '' |
| 30 | for (const property in style) { |
| 31 | // @ts-ignore |
| 32 | stickyRef.current.style[property] = '' |
| 33 | } |
| 34 | } |
| 35 | }, |
| 36 | // eslint-disable-next-line react-hooks/exhaustive-deps |
| 37 | [JSON.stringify(style)] |
| 38 | ) |
| 39 | |
| 40 | const { ref: observedRef, inView } = useInView({ |
| 41 | threshold: 0.1, |
| 42 | onChange: handleSticking, |
| 43 | skip: !enabled, |
| 44 | }) |
| 45 | |
| 46 | return { |
| 47 | inView, |
| 48 | observedRef, |
| 49 | stickyRef, |
| 50 | } |
| 51 | } |
| 52 | |
| 53 | export { useSticky } |