Locals[cdt][cdn] do not show objects for custom field

[Antony_Praveenkumar]

If you want to change the df property of the field based on the qty field changed in the Child table means use this code

frappe.ui.form.on('Stock Entry Detail', {
   qty: function(frm, cdt, cdn) {
     let child = locals[cdt][cdn];
     if (child.qty){
          let options = ["Option 1", "Option 2", "Option 3"]
          frm.set_df_property("uom_select", "options", options )
     } else {
         console.log("qty field is zero");
     }
   }
})

For Reference [Tutorial] set_df_property | Parent Table & Child Table | 2023

@scratching_head

frappe.ui.form.on('Stock Entry Detail', {
    qty: function(frm, cdt, cdn) {
        var d = locals[cdt][cdn];
        console.log("d = "+JSON.stringify(d, null, 4));
        if ('uom_select') {
                frappe.model.set_value(cdt, cdn, 'uom_select', "Option1\nOption2");
        } else {
                console.log("uom_select field not found");
        }
    }
});