hello 

i want to show the Qty on hand for the product on the POS screen 

I tried many solutions but no result 

i put on POS.xml : 

<t t-extend="Product">

<t t-jquery=".product-img" t-operation="append">

<span t-attf-class="qty-tag #{product.qty_available lte 0 ? 'not-available':''}">

<t t-esc="product.qty_available"/> 

</span>

</t>

</t>

 when  i put ( product.barcode) its work 
but the qty noo 

can anyone help me with this, please  ?? 
it's urgent 
thanks