How to overcome the ‘no drag and drop functionality - part 2

<apex:page standardController=”Case” extensions=”DragAndDropController” >
    <apex:slds > 
        <apex:form > 
            <apex:actionFunction name=”redirectToDragAndDropEmailAuthor” action=”{!goToEmailDragAndDrop}” /> 
        </apex:form>
    </apex:slds>
    
    <script>
    document.addEventListener(‘readystatechange’, event => { 
                              if (event.target.readyState === “interactive”) {
        redirectToDragAndDropEmailAuthor();}
    });
    </script>
    
</apex:page>