@react-leaflet/core/lib/attribution.js

React Leaflet core

import { useEffect, useRef } from 'react';
export function useAttribution(map, attribution) {
    const attributionRef = useRef(attribution);
    useEffect(function updateAttribution() {
        if (attribution !== attributionRef.current && map.attributionControl != null) {
            if (attributionRef.current != null) {
                map.attributionControl.removeAttribution(attributionRef.current);
            }
            if (attribution != null) {
                map.attributionControl.addAttribution(attribution);
            }
        }
        attributionRef.current = attribution;
    }, [
        map,
        attribution
    ]);
}