Get or find input for specific field. jQuery.

 $('body').on('change', '#field_name', function () {

            let fieldName = $(this).val();

            let fieldLevelValue = fieldName.replaceAll('_', ' ');
            fieldLevelValue = capitalizeWords(fieldLevelValue);

            let fieldLevel = $(this).parent().closest('tr')[0].children[1];
            let placeHolder = $(this).parent().closest('tr')[0].children[6];



            $(fieldLevel).find('input').val(fieldLevelValue)
            $(placeHolder).find('input').val(fieldLevelValue)

        })