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26 lines
1.0 KiB
JavaScript
26 lines
1.0 KiB
JavaScript
(function () {
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// Get the default theme from the HTML data-theme attribute.
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const defaultTheme = document.documentElement.getAttribute('data-theme');
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// Set the data-default-theme attribute only if defaultTheme is not null.
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if (defaultTheme) {
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document.documentElement.setAttribute('data-default-theme', defaultTheme);
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}
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// Attempt to retrieve the current theme from the browser's local storage.
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const storedTheme = localStorage.getItem('theme');
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if (storedTheme) {
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document.documentElement.setAttribute('data-theme', storedTheme);
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} else if (defaultTheme) {
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document.documentElement.setAttribute('data-theme', defaultTheme);
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} else {
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// If no theme is found in local storage and no default theme is set, use user's system preference.
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const isSystemDark = window.matchMedia('(prefers-color-scheme: dark)').matches;
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document.documentElement.setAttribute(
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'data-theme',
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isSystemDark ? 'dark' : 'light'
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);
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}
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})();
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