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- 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
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