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30d06dc0ff
Co-authored-by: uranuspucksaxophone <84784521+uranuspucksaxophone@users.noreply.github.com> Co-authored-by: zyachel <aricla@protonmail.com>
55 lines
2.3 KiB
JavaScript
55 lines
2.3 KiB
JavaScript
////////////////////////////////////////////////////////
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// CONSTANTS
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////////////////////////////////////////////////////////
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const rootEl = document.documentElement;
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const headerEl = document.querySelector('.header');
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const [metaThemeEl, tempMetaThemeEl] = document.querySelectorAll(
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'meta[name="theme-color"]'
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);
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const btnTheme = document.querySelector('.theme-changer');
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////////////////////////////////////////////////////////
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// HELPER FUNCTIONS
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////////////////////////////////////////////////////////
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// gets theme prefered by browser
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const browserPrefersDarkTheme = window.matchMedia(
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'(prefers-color-scheme: dark)'
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).matches;
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// gets theme prefered by user(stored in local storage)
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const userPrefersTheme = localStorage?.getItem('theme');
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// sets theme to local storage
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const setTheme = theme => rootEl.setAttribute('theme', theme);
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const localStorageAccessible = !!typeof Storage;
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////////////////////////////////////////////////////////
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// EVENT LISTENER
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////////////////////////////////////////////////////////
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btnTheme.addEventListener('click', () => {
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const curTheme = rootEl.getAttribute('theme') || 'light';
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const themeToSet = curTheme === 'light' ? 'dark' : 'light';
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const colorToAdd = window.getComputedStyle(headerEl).backgroundColor;
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setTheme(themeToSet);
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// changes the meta theme-color tag to match the header color
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metaThemeEl.setAttribute('content', colorToAdd);
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// only setting the value in localStoage if it's actually accessible
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if (localStorageAccessible) localStorage.setItem('theme', themeToSet);
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});
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////////////////////////////////////////////////////////
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// INIT FUNCTION
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////////////////////////////////////////////////////////
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(() => {
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// setting this attr on root to not render some css styles
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rootEl.setAttribute('js-enabled', '');
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// removing duplicate meta theme color(it's initially for those who haven't enabled js)
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metaThemeEl.removeAttribute('media');
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tempMetaThemeEl.remove();
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// applying theme preferences in case they exist
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if (userPrefersTheme) setTheme(userPrefersTheme);
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else if (browserPrefersDarkTheme) setTheme('dark');
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})();
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////////////////////////////////////////////////////////
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// MATHJAX CONFIG
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////////////////////////////////////////////////////////
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window.MathJax = { options: { enableMenu: false } };
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