Set focus to the filter search box of DropDownList dynamically.
Set focus to the filter search input box of DropDownList dynamically by executing the focus () method on search box in the _OnPopupHideShow method of DropDownList.
Refer to the following code snippet:
N> By default, filter search input box will be focused on popup in 188.8.131.52 and the above versions. This workaround is applicable for older versions that is before 15.2.
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