storing a three.js mesh object with indexedDB
object = new THREE.Mesh( geometry, material );

webkitIndexedDB.open("MyNewDB").onsuccess = function(event) {
  window.db = event.srcElement.result;

  window.db.setVersion("1.0").onsuccess = function(event) {
    var objectStore = window.db.createObjectStore("meshes", { keyPath: "item_id" });

    objectStore.add({item_id: 0, mesh: object});  //  <= this is the crucial line

  };
};