leaflet-toggleable-attribution/src/L.Control.ToggleableAttribution.css

Minimalist Leaflet plugin to display the map attribution only when hovered on.

.leaflet-control-attribution-icon {
    display: inline-block;
}

.leaflet-control-attribution-body {
    display: none;
    padding: 0px 5px;
}

.leaflet-control-attribution:hover > .leaflet-control-attribution-body {
    display: inline-block;
}