Combobox event change show undefined

Suite and Optimus Suite 8
#1

Why after click combobox even show undefined value then real value?
combobox.events.on(“change”, function (id) {
alert(id);
})
the example on DHTMLX Snippet Tool

#2

This is the expected behavior.
Changing the selected option in the combo performs in two steps:

  1. Clearing the selected option (change event returns with null value)
  2. Setting a new option (change event with the new selected option)
#3

before Version 8.3.8 doent show undefined, could you give me some example?

#4

before Version 8.3.8 doent show undefined,

If you check the version 7.1:
https://snippet.dhtmlx.com/8fb0574n
It had the same behavior.

could you give me some example?

Could you please, clarify what kind of example do you expect?

#5

In 8.3.7 is normal like this DHTMLX Snippet Tool, not show the undefined id

#6

Unfortunately the current behavior is the expected one.