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62 changes: 62 additions & 0 deletions
62
examples/pigment-css-vite-ts/src/components/ColorSchemeProvider.tsx
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,62 @@ | ||
| import * as React from 'react'; | ||
|
|
||
| const ColorSchemeContext = React.createContext<{ | ||
| colorScheme: string; | ||
| setColorScheme: React.Dispatch<React.SetStateAction<string>>; | ||
| }>({ | ||
| colorScheme: 'light', | ||
| setColorScheme: () => '', | ||
| }); | ||
|
|
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| function setCookie(name: string, value: string, days: number = 100) { | ||
| let expires = ''; | ||
| if (days) { | ||
| const date = new Date(); | ||
| date.setTime(date.getTime() + days * 24 * 60 * 60 * 1000); | ||
| expires = `; expires=${date.toUTCString()}`; | ||
| } | ||
| document.cookie = `${name}=${value || ''}${expires}; path=/`; | ||
| } | ||
|
|
||
| export function ColorSchemeProvider({ | ||
| colorScheme: initialColorScheme, | ||
| children, | ||
| }: React.PropsWithChildren<{ colorScheme: string }>) { | ||
| const [colorScheme, setColorScheme] = React.useState<string>(initialColorScheme); | ||
|
|
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| const contextValue = React.useMemo( | ||
| () => ({ colorScheme, setColorScheme }), | ||
| [colorScheme, setColorScheme], | ||
| ); | ||
|
|
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| // Set the colorScheme in localStorage | ||
| React.useEffect(() => { | ||
| setCookie('colorScheme', colorScheme); | ||
| localStorage.setItem('colorScheme', colorScheme); | ||
| }, [colorScheme]); | ||
|
|
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| // Handle when localStorage has changed | ||
| React.useEffect(() => { | ||
| const handleStorage = (event: StorageEvent) => { | ||
| const value = event.newValue; | ||
| if ( | ||
| typeof event.key === 'string' && | ||
| event.key === 'colorScheme' && | ||
| typeof value === 'string' | ||
| ) { | ||
| setColorScheme(value); | ||
| } | ||
| }; | ||
| // For syncing color-scheme changes between iframes | ||
| window.addEventListener('storage', handleStorage); | ||
| return () => { | ||
| window.removeEventListener('storage', handleStorage); | ||
| }; | ||
| }, [setColorScheme]); | ||
|
|
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| return <ColorSchemeContext.Provider value={contextValue}>{children}</ColorSchemeContext.Provider>; | ||
| } | ||
|
|
||
| export const useColorScheme = () => { | ||
| return React.useContext(ColorSchemeContext); | ||
| }; |
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