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feat(app): integrate with view transitions to keep state
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,66 @@ | ||
| import { useEffect, useState } from 'react'; | ||
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| export const useActiveElement = () => { | ||
| const [listenersReady, setListenersReady] = useState(false); | ||
| const [activeElement, setActiveElement] = useState(document.activeElement); | ||
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| useEffect(() => { | ||
| const onFocus = (event: FocusEvent) => setActiveElement(event.target as any); | ||
| const onBlur = (event: FocusEvent) => setActiveElement(null); | ||
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| window.addEventListener('focus', onFocus, true); | ||
| window.addEventListener('blur', onBlur, true); | ||
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| setListenersReady(true); | ||
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| return () => { | ||
| window.removeEventListener('focus', onFocus); | ||
| window.removeEventListener('blur', onBlur); | ||
| }; | ||
| }, []); | ||
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| return { | ||
| active: activeElement, | ||
| ready: listenersReady | ||
| }; | ||
| }; | ||
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| /** | ||
| * Copied from https://github.com/streamich/react-use/blob/master/src/useSessionStorage.ts | ||
| */ | ||
| export const useSessionStorage = <T>( | ||
| key: string, | ||
| initialValue?: T, | ||
| raw?: boolean | ||
| ): [T, (value: T) => void] => { | ||
| // eslint-disable-next-line react-hooks/rules-of-hooks | ||
| const [state, setState] = useState<T>(() => { | ||
| try { | ||
| const sessionStorageValue = sessionStorage.getItem(key); | ||
| if (typeof sessionStorageValue !== 'string') { | ||
| sessionStorage.setItem(key, raw ? String(initialValue) : JSON.stringify(initialValue)); | ||
| return initialValue; | ||
| } else { | ||
| return raw ? sessionStorageValue : (JSON.parse(sessionStorageValue || 'null') as any); | ||
| } | ||
| } catch { | ||
| // If user is in private mode or has storage restriction | ||
| // sessionStorage can throw. JSON.parse and JSON.stringify | ||
| // can throw, too. | ||
| return initialValue; | ||
| } | ||
| }); | ||
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| // eslint-disable-next-line react-hooks/rules-of-hooks | ||
| useEffect(() => { | ||
| try { | ||
| const serializedState = raw ? String(state) : JSON.stringify(state); | ||
| sessionStorage.setItem(key, serializedState); | ||
| } catch { | ||
| // If user is in private mode or has storage restriction | ||
| // sessionStorage can throw. Also JSON.stringify can throw. | ||
| } | ||
| }); | ||
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| return [state, setState]; | ||
| }; |
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