Google Maps API V3: Show the whole world

Question

How can I programmatically zoom the map so that it covers the whole world?

Answer 1

It's not guaranteed to not have repeats, but by abusing the fact the base tile starts at 256 (zoom 0) and doubles at each increment there on in -- you can select the optimum zoom level using a logarithm function.

function initialize () {
  var mapOptions = {
    center: new google.maps.LatLng(0, 0),
    zoom: Math.ceil(Math.log2($(window).width())) - 8,
  };
  
  var map = new google.maps.Map(document.getElementById('map'), mapOptions);
}

google.maps.event.addDomListener(window, 'load', initialize);

#map {
  width: 100%;
  height: 500px;
}