Thanks for your reply but this was not I was looking for.
I want a dropdown with items having checkbox. When item is checked (not selected), dropdwon value should be changed as CSV of values/text.
I have achieved this but having issues in checking items when I upgraded my Kendo version to 2019. Please look at this dojo
I have used a custom plugin.
Can you help me in this, because it was working fine since long and after upgrade, this stopped working.
I don't want to change UI beahviour.