Convert Nepali Date Inside Table (Child Doctype)

frappe.ui.form.on("Nepali Date Demo Child", "english_date_child", function(frm, cdt, cdn) {    
    frappe.model.set_value(cdt, cdn, "nepali_date_child", NepaliFunctions.AD2BS(locals[cdt][cdn].english_date_child, "YYYY-MM-DD", "YYYY-MM-DD"));   
});

frappe.ui.form.on("Nepali Date Demo Child", "nepali_date_child", function(frm, cdt, cdn) {
    frappe.model.set_value(cdt, cdn, "english_date_child", NepaliFunctions.BS2AD(locals[cdt][cdn].nepali_date_child, "YYYY-MM-DD", "YYYY-MM-DD"));   
});

Nepali Date Conversion Inside Table (Child Doctype) BS2AD

frappe.model.set_value(cdt, cdn, "english_date_child", NepaliFunctions.BS2AD(locals[cdt][cdn].nepali_date_child, "YYYY-MM-DD", "YYYY-MM-DD"));   

Nepali Date Conversion Inside Table (Child Doctype) AD2BS

frappe.model.set_value(cdt, cdn, "nepali_date_field", NepaliFunctions.AD2BS(english_date_field, "YYYY-MM-DD", "YYYY-MM-DD"));

Disclaimer: Currently Nepali calendar popup is not working on the child table but can convert Nepali to English and vice versa.