onRowMark

fires before each attempt to mark the updated item

id	string|number	id of item for which error occurs
state	string	item's state ( operation type )
mode	boolean	true for adding update mark, false for removing
invalid	object	details about errors, if any

Example

dp.attachEvent("onRowMark", function(id, state, mode, invalid){
    //custom code here
    return true;
});

Event is blockable. Return false to prevent item marking

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