UnityScript : create one class inherited other class based monobehavior

Unity Engine
1

I create a class inherited another class based monobehavior

“ItemBase.js” File
class ItemBase extends Monobehavior {
var toOpp : boolean;
var curCamera : Tranform;

function Start() {
if(curCamera == null)
Debug.Log(“curCamera is null!!!”);
}
}

“Item.js” File
class Item extends ItemBase {
var nameStr : String;
}

Drag the Item.js to one GameObject in hierarchy
in the inspector , show the three variable(toOpp, curCamera and nameStr)
drag the camera in hierarchy to curCamera

running and the console output is:
curCamera is null!!!

why! why! why!

2

I just tried your code (after fixing the spelling mistakes) and it works fine. Heres what I used:
Base.js

class Base extends MonoBehaviour {

	var toOpp : boolean;
	var curCamera : Transform;

	function Start() {

		if(curCamera == null) {
			Debug.Log("curCamera is null!!!");
		} else {
			Debug.Log("Has curCamera");
		}
	
	}

}

Child.js

class Child extends Base {

	var nameStr : String;
	
}
3

oh my god , i find my mistake
item.js file is completed yesterday and have been draged to one temporary gameObject
now, this file was attached to two gameObjects, i forget.
the mistake command output is from another Item instance

thanks Dman