title: Can I prevent panning Leaflet map out of the world's edge?
body: <p>Is there a way to limit panning out of the world's edge? On this picture, brown is the world, grey is emptiness. I want to make it impossible to pan like this.</p>
  
  <p><img src="https://i.stack.imgur.com/332S2.png" alt="out of this world"></p>