#Leaflet.HardBounds
Leaflet plugin to prevent panning outside of map bounds.
Requires: Leaflet v0.6.3 or higher.
Setup hard bounds:
map.addHardBounds();
Then you can set maxBounds as usual:
var bounds = L.latLngBounds([[51.55, -0.2], [51.45, 0]]);
map.setMaxBounds(bounds);
Or even unset them:
map.setMaxBounds(null);
However, it's better to remove listener if you need hard bounds no more:
map.removeHardBounds();
The MIT License.