this.SOMETHING始终返回未定义-extjs

Question

I have a portlet that includes a tabbed panel. In that panel is a chart. In one of the chart's functions, I do a console.log(this) and am able to view all of the contents. However, my main intention is to use the value this.ownerCt , this says that it exists, but when I try to use it, or console.log it, it reports as undefined. If I do a this.id or this.idname I get the actual ids.

Problem: Why would this.SOMETHING return undefined if there is a value for it in this ?

Some code tidbits: here is console.log(this) .

Ext.Class.newClass
  additionalCls: Array[2]
  body: Ext.Element.Ext.core.Element
  childEls: Array[1]
  collapseDirection: "top"
  componentCls: "x-panel"
  componentLayout: Ext.Class.newClass
  componentLayoutCounter: 3
  container: Ext.Element.Ext.core.Element
  dockedItems: Ext.Class.newClass
  el: Ext.Element.Ext.core.Element
  id: "stackedbarportlet-1055"
  itemId: "graph"
  items: Ext.Class.newClass
  ownerCt: Ext.Class.newClass
  xtype: "stackedbarportlet"

I took a few instances out, but this is the general output of it!

console.log(this.ownerCt) results in: undefined .

Answer 1

<script>

var t1="";
var t2;

if (t1===undefined)
{
alert("t1 is undefined");
}
if (t2===undefined)
{
alert("t2 is undefined");
}

</script>

if you run that t2 is undefined probably this.ownerCt has no value

Answer 2

You may find your answer here . It seems that sometimes console.log() invocations are queued and eventually invoked after the end of the current statement, so their output don't necessarily reflect the object state exactly in the moment as it is in the code.

At least, I experienced similar behavior when I was overriding the constructor function in custom defined ExtJS's store.