resetData will reset all the form fields.  To reset data for a few fields in the form, you can create an array of fields and then pass that array to a function and set data to null for each field by traversing the array. This will help you write less code.

You can set it in the tab Object>Field>Appearance to Underlined, but the underlined will come in the bottom always

Can I see your form?

Delete service is not available OOTB, you can create a custom service for delete operation in Java by creating a servlet/Rest service, etc.

Please follow this :   https://docs.mktossl.com/docs/experience-manager-65/forms/getting-started/create-first-interactive-communication/create-form-data-model0.html  

Use the below code after resetData()   xfa.form.remerge();

what is not working here, seems valid code. try to print to check if it shows the length value.   app.alert(temp);

You can write like below: var total =0; var oFields = xfa.resolveNodes("tblHandlingUnits.rowHUDataTBL[*]"); for (var i = 0; i < oFields.length; i++){ var rowInstance = oFields.item(i);   // Now with rowInstance you can access  any fields inside this total += parseInt(rowInstance.(path to your fiel...

Follow the below link: https://experienceleaguecommunities.adobe.com/t5/adobe-livecycle-questions/get-current-date/m-p/117777#:~:text=write%20the%20script..-,Num2Date(Date()%2C%20%22MM%2FDD%2FYYYY%22,and%20search%20for%20Num2Date%20function.  

Check the renders section of the dispatcher.any file for the publish server   /renders {/0001 {/hostname "${PUBLISH_IP}"/port "8443"}}