Function runDarkThemeDetector

src/inject/detector.ts:149–188

(callback: (hasDarkTheme: boolean) => void, hints: DetectorHint[])

}

export function runDarkThemeDetector(callback: (hasDarkTheme: boolean) => void, hints: DetectorHint[]): void {
    stopDarkThemeDetector();
    if (hints && hints.length > 0) {
        const hint = hints[0];
        if (hint.noDarkTheme) {
            callback(false);
            return;
        }
        if (hint.systemTheme && isSystemDarkModeEnabled()) {
            callback(true);
            return;
        }
        detectUsingHint(hint, () => callback(true));
        return;
    }

    if (canCheckForStyle()) {
        runCheck(callback);
        return;
    }

    observer = new MutationObserver(() => {
        if (canCheckForStyle()) {
            stopDarkThemeDetector();
            runCheck(callback);
        }
    });
    observer.observe(document.documentElement, {childList: true});

    if (document.readyState !== 'complete') {
        readyStateListener = () => {
            if (document.readyState === 'complete') {
                stopDarkThemeDetector();
                runCheck(callback);
            }
        };
        // readystatechange event is not cancellable and does not bubble
        document.addEventListener('readystatechange', readyStateListener);
    }
}

export function stopDarkThemeDetector(): void {
    if (observer) {