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feat: reduce the number of renderings in the default mode of `useSwit…
…chTransition`
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,8 @@ | ||
| import { useRef } from 'react' | ||
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| export function useStateChange<S>(state: S) { | ||
| const curRef = useRef(state) | ||
| const hasChanged = curRef.current !== state | ||
| curRef.current = state | ||
| return hasChanged | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,73 +1,82 @@ | ||
| import { useEffect, useState } from 'react' | ||
| import { useState } from 'react' | ||
| import { STATUS, getState } from '../../status' | ||
| import { nextTick } from '../../helpers/setAnimationFrameTimeout' | ||
| import { getTimeout } from '../../helpers/getTimeout' | ||
| import type { ListItem, ModeHookParam } from './index' | ||
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| function nowFn(callback: () => unknown) { | ||
| return callback() | ||
| } | ||
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| export function useDefaultMode<S>({ | ||
| state, | ||
| timeout, | ||
| mode, | ||
| keyRef, | ||
| list, | ||
| setList, | ||
| hasChanged, | ||
| from, | ||
| }: ModeHookParam<S>) { | ||
| const { enterTimeout, exitTimeout } = getTimeout(timeout) | ||
| const timeoutIdMap = useState(() => new Map<number, number>())[0] | ||
| useEffect(() => { | ||
| // skip unmatched mode 🚫 | ||
| if (mode !== undefined && mode !== 'default') | ||
| return | ||
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| const [lastItem] = list.slice(-1) | ||
| if (lastItem.state === state) | ||
| return | ||
| const nextTickOrNow = from ? nextTick : nowFn | ||
| // skip unmatched mode 🚫 | ||
| if (mode !== undefined && mode !== 'default') | ||
| return | ||
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| if (!hasChanged) | ||
| return | ||
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| const [lastItem] = list.slice(-1) | ||
| if (lastItem.state === state) | ||
| return | ||
|
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| // 0 update key | ||
| const prevKey = keyRef.current // save prev key | ||
| keyRef.current++ // update to last item key | ||
| const curKey = keyRef.current // save cur key (for async gets) | ||
| // 0 update key | ||
| const prevKey = keyRef.current // save prev key | ||
| keyRef.current++ // update to last item key | ||
| const curKey = keyRef.current // save cur key (for async gets) | ||
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| // 1 add new item immediately with stage 'from' | ||
| setList(prev => prev.concat({ state, prevState: lastItem.state, key: curKey, ...getState(STATUS.from) })) | ||
| // 1 add new item immediately with stage 'from' | ||
| setList(prev => prev.concat({ state, prevState: lastItem.state, key: curKey, ...getState(STATUS.from) })) | ||
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| // 1.1 change this item immediately with stage 'entering' | ||
| const isCurItem = (item: ListItem<S>) => item.key === curKey | ||
| nextTick(() => { | ||
| // 1.1 change this item immediately with stage 'entering' | ||
| const isCurItem = (item: ListItem<S>) => item.key === curKey | ||
| nextTickOrNow(() => { | ||
| setList(prev => | ||
| prev.map(item => (isCurItem(item) ? { ...item, ...getState(STATUS.entering) } : item)), | ||
| ) | ||
| const id = window.setTimeout(() => { | ||
| setList(prev => | ||
| prev.map(item => (isCurItem(item) ? { ...item, ...getState(STATUS.entering) } : item)), | ||
| prev.map(item => (isCurItem(item) ? { ...item, ...getState(STATUS.entered) } : item)), | ||
| ) | ||
| const id = window.setTimeout(() => { | ||
| setList(prev => | ||
| prev.map(item => (isCurItem(item) ? { ...item, ...getState(STATUS.entered) } : item)), | ||
| ) | ||
| timeoutIdMap.delete(curKey) | ||
| }, enterTimeout) | ||
| timeoutIdMap.set(curKey, id) | ||
| }) | ||
| timeoutIdMap.delete(curKey) | ||
| }, enterTimeout) | ||
| timeoutIdMap.set(curKey, id) | ||
| }) | ||
|
|
||
| // 1.2 leave prev item immediately with stage 'exiting' | ||
| const shouldItemLeave = (item: ListItem<S>) => item.key === prevKey | ||
| setList(prev => | ||
| prev.map(item => { | ||
| if (!shouldItemLeave(item)) | ||
| return item | ||
| // 1.2 leave prev item immediately with stage 'exiting' | ||
| const shouldItemLeave = (item: ListItem<S>) => item.key === prevKey | ||
| setList(prev => | ||
| prev.map(item => { | ||
| if (!shouldItemLeave(item)) | ||
| return item | ||
|
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| const id = timeoutIdMap.get(item.key) | ||
| if (id) { | ||
| clearTimeout(id) | ||
| timeoutIdMap.delete(item.key) | ||
| } | ||
| const id = timeoutIdMap.get(item.key) | ||
| if (id) { | ||
| clearTimeout(id) | ||
| timeoutIdMap.delete(item.key) | ||
| } | ||
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| return { ...item, nextState: state, ...getState(STATUS.exiting) } | ||
| }, | ||
| ), | ||
| ) | ||
| return { ...item, nextState: state, ...getState(STATUS.exiting) } | ||
| }, | ||
| ), | ||
| ) | ||
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| // 2 unmount leaved item after timeout | ||
| const shouldUnmountItem = (item: ListItem<S>) => item.key !== prevKey | ||
| setTimeout(() => { | ||
| setList(prev => prev.filter(shouldUnmountItem)) | ||
| }, exitTimeout) | ||
| }, [keyRef, list, mode, setList, state, enterTimeout, exitTimeout]) | ||
| // 2 unmount leaved item after timeout | ||
| const shouldUnmountItem = (item: ListItem<S>) => item.key !== prevKey | ||
| setTimeout(() => { | ||
| setList(prev => prev.filter(shouldUnmountItem)) | ||
| }, exitTimeout) | ||
| } |