I’m trying to achieve this XML output in NodeJS in a Lambda function :

<Section ProductId="46m8t">
        <Item ItemQty="1">
        <Image>Road.jpg</Image>
        <ItemProductValue>0.50</ItemProductValue>
        <ItemShippingValue>1.00</ItemShippingValue>
      </Item>
</Section>

from this :

Sections: listedObjects.Contents.map(file => ({
      Section: {
        $: { ProductId: "46m8t" },
        Item: {
          $: {
            ItemQty: "1",
            Image: file.Key.split('/').pop(),
            ItemProductValue: "0.50",
            ItemShippingValue: "1.00"
          }
        }
      }
    }))

Using this builder setting :

    const builder = new xml2js.Builder({
       headless: true,
       renderOpts: { 'pretty': true },
       explicitArray: true,
       explicitChildren: true,
       preserveChildrenOrder: true
    });

The function just drops as the XML build fails.

This works :

    Sections: listedObjects.Contents.map((file) => ({
          Section: {
              $: { ProductId: "46m8t" }, // Included ProductId directly in the Section tag
              Item: {
                  ItemQty: "1",
                  Image: file.Key.split('/').pop(), // Only the filename
                  ItemProductValue: "0.50",
                  ItemShippingValue: "1.00"
              }
          }
    }))

but gives me this output :

   <Sections>
     <Section ProductId="46m8t">
         <Item>
           <ItemQty>1</ItemQty>
            <Image>Road.jpg</Image>
            <ItemProductValue>0.50</ItemProductValue>
            <ItemShippingValue>1.00</ItemShippingValue>
          </Item>
        </Section>
     </Sections>

Using this Builder :

     const builder = new xml2js.Builder({ headless: true, renderOpts: { 'pretty': true } });