| import { SpringValue, useSpring } from '@react-spring/web' |
| import { useIsomorphicLayoutEffect } from './useIsomorphicEffect' |
| import { useStickyHeader } from './useStickyHeader' |
| import { useWindowScrolling, SCROLL_DIR } from './useWindowScrolling' |
|
|
| interface UseAnimatedHeaderProps { |
| isHeader?: boolean |
| alwaysAnimate?: boolean |
| heights: [desktop: number, mobile: number] |
| } |
|
|
| export const useAnimatedHeader = ({ |
| isHeader = true, |
| alwaysAnimate = false, |
| heights, |
| }: UseAnimatedHeaderProps): [ |
| styles: { top: SpringValue<number> }, |
| isStuck: boolean, |
| scrollTop: number, |
| direction: SCROLL_DIR | undefined, |
| ] => { |
| const [direction, scrollTop] = useWindowScrolling({ |
| active: true, |
| threshold: [0, 20], |
| }) |
|
|
| const isStuck = useStickyHeader(heights) |
|
|
| const [styles, api] = useSpring(() => ({ |
| top: 0, |
| y: 0, |
| })) |
|
|
| |
| |
| |
| |
| |
| |
| |
| useIsomorphicLayoutEffect(() => { |
| const { innerWidth } = window |
|
|
| const limit = innerWidth < 768 ? heights[1] : heights[0] |
|
|
| if (direction === 'down') { |
| if (!isStuck) { |
| api.set({ |
| top: isHeader ? limit * -1 : 0, |
| }) |
| } |
|
|
| if (alwaysAnimate && !isStuck) { |
| api.start({ |
| from: { |
| y: limit, |
| }, |
| to: { |
| y: 0, |
| }, |
| }) |
| } |
|
|
| if (isStuck) { |
| api.start({ |
| y: 0, |
| }) |
| } |
| } else if (direction === 'up') { |
| if (scrollTop <= limit && !isStuck) { |
| api.set({ |
| top: 0, |
| y: 0, |
| }) |
| } else { |
| api.start({ |
| y: limit, |
| }) |
| } |
| } |
| }, [direction, isStuck]) |
|
|
| return [styles, isStuck, scrollTop, direction] |
| } |
|
|
