This hook is triggered before editing child-object data, specifically before an input gains focus. It allows extra business actions before editing, including but not limited to intercepting child-object editing.

Parameters

Parameter	Description	Type
Common parameters	See details	--
objApiName	Child object apiName	String
recordType	Child object record type	String
dataIndex	Row ID of the child-object data being edited	Array
fieldName	Field being edited	String