const colorIndexRegExp = /((?:not )?all and )?(\(color-index: *(22|48|70)\))/i; const prefersColorSchemeRegExp = /prefers-color-scheme:/i; const prefersColorSchemeInit = initialColorScheme => { const mediaQueryString = '(prefers-color-scheme: dark)'; const mediaQueryList = window.matchMedia && matchMedia(mediaQueryString); const hasNativeSupport = mediaQueryList && mediaQueryList.media === mediaQueryString; const mediaQueryListener = () => { set(mediaQueryList.matches ? 'dark' : 'light'); }; const removeListener = () => { if (mediaQueryList) { mediaQueryList.removeListener(mediaQueryListener); } }; const set = colorScheme => { if (colorScheme !== currentColorScheme) { currentColorScheme = colorScheme; if (typeof result.onChange === 'function') { result.onChange(); } } [].forEach.call(document.styleSheets || [], styleSheet => { [].forEach.call(styleSheet.cssRules || [], cssRule => { const colorSchemeMatch = prefersColorSchemeRegExp.test(Object(cssRule.media).mediaText); if (colorSchemeMatch) { const index = [].indexOf.call(cssRule.parentStyleSheet.cssRules, cssRule); cssRule.parentStyleSheet.deleteRule(index); } else { const colorIndexMatch = (Object(cssRule.media).mediaText || '').match(colorIndexRegExp); if (colorIndexMatch) { cssRule.media.mediaText = ((/^dark$/i.test(colorScheme) ? colorIndexMatch[3] === '48' : /^light$/i.test(colorScheme) ? colorIndexMatch[3] === '70' : colorIndexMatch[3] === '22') ? 'not all and ' : '') + cssRule.media.mediaText.replace(colorIndexRegExp, '$2'); } } }); }); }; const result = Object.defineProperty({ hasNativeSupport, removeListener }, 'scheme', { get: () => currentColorScheme, set }); // initialize the color scheme using the provided value, the system value, or light let currentColorScheme = initialColorScheme || (mediaQueryList && mediaQueryList.matches ? 'dark' : 'light'); set(currentColorScheme); // listen for system changes if (mediaQueryList) { mediaQueryList.addListener(mediaQueryListener); } return result; }; export default prefersColorSchemeInit; //# sourceMappingURL=index.mjs.map