34 lines
944 B
JavaScript
34 lines
944 B
JavaScript
const handleThemeChange = (dark) => {
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const root = window.document.documentElement
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root.setAttribute('data-bs-theme', dark ? 'dark' : 'light')
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}
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const STORAGE_KEY = 'darkMode'
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const PREFER_DARK_QUERY = '(prefers-color-scheme: dark)'
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const getTheme = () => {
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const mql = window.matchMedia(PREFER_DARK_QUERY)
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const supportsColorSchemeQuery = mql.media === PREFER_DARK_QUERY
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let localStorageTheme = null
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try {
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localStorageTheme = window.localStorage.getItem(STORAGE_KEY)
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} catch (err) {}
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const localStorageExists = localStorageTheme !== null
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if (localStorageExists) {
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localStorageTheme = JSON.parse(localStorageTheme)
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}
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if (localStorageExists) {
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return { user: true, dark: localStorageTheme }
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} else if (supportsColorSchemeQuery) {
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return { user: false, dark: mql.matches }
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}
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}
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if (typeof window !== 'undefined') {
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(function () {
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const { dark } = getTheme()
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handleThemeChange(dark)
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})()
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}
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