Too few positions

[nordmograph]

Not a so called issue. But this plugin lacks positions.
At least

topcenter
center
bottomcenter
left
right

[peeebeee]

Not a so called issue. But this plugin lacks positions. At least

topcenter center bottomcenter left right

I know it's 6 years later, but for anyone else travelling this path....

The positions quoted are part of the underlying L.Control object. There are ways of extending these to include, for example, the 'center' positions you're asking for. I use this code (also needs some CSS, see the linked answer)

// Create additional Control placeholders
function addControlPlaceholders(map) {
  var corners = map._controlCorners,
      l = 'leaflet-',
      container = map._controlContainer;

  function createCorner(vSide, hSide) {
      var className = l + vSide + ' ' + l + hSide;

      corners[vSide + hSide] = L.DomUtil.create('div', className, container);
  }

  createCorner('bottom', 'center');
  createCorner('top', 'center');
}

addControlPlaceholders(map);

which is from this answer on Stackoverflow by @ghybs