gmap3 - version 7.2

• Configuration
• API
  • Address resolution
  • Chaining
• Main
  • map
  • streetviewpanorama
• Events
  • on
  • once
• Overlays
  • circle
  • cluster
  • groundoverlay
  • infowindow
  • marker
  • overlay
  • polygon
  • polyline
  • rectangle
• Layers
  • bicyclinglayer
  • kmllayer
  • trafficlayer
  • transitlayer
• Mixed
  • directionsrenderer
  • route
  • styledmaptype
• Tools
  • catch
  • fit
  • latlng
  • then
  • wait

once

once is like on, but the handler removes itself after handling the first event.
It silently uses addListenerOnce or addDomListenerOnce depending on the object type (see google.maps.event documentation).

Example