react-native-vision-camera/lib/hooks/internal/useTorchModeUpdater.js

VisionCamera is the fastest and most powerful Camera for react-native.

import { useEffect } from 'react';
export function useTorchModeUpdater(controller, torchMode) {
    useEffect(() => {
        if (controller == null)
            return;
        if (torchMode == null)
            return;
        controller.setTorchMode(torchMode);
    }, [controller, torchMode]);
}