diff --git a/erpnext/public/js/account_tree_grid.js b/erpnext/public/js/account_tree_grid.js
index 757f33e..413a5ee 100644
--- a/erpnext/public/js/account_tree_grid.js
+++ b/erpnext/public/js/account_tree_grid.js
@@ -14,9 +14,9 @@
 // You should have received a copy of the GNU General Public License
 // along with this program.	If not, see <http://www.gnu.org/licenses/>.
 
-erpnext.AccountTreeGrid = frappe.views.TreeGridReport.extend({
-	init: function(wrapper, title) {
-		this._super({
+erpnext.AccountTreeGrid = class AccountTreeGrid extends frappe.views.TreeGridReport {
+	constructor(wrapper, title) {
+		super({
 			title: title,
 			parent: $(wrapper).find('.layout-main'),
 			page: wrapper.page,
@@ -33,8 +33,24 @@
 				}
 			},
 		});
-	},
-	setup_columns: function() {
+
+		this.filters = [
+			{fieldtype: "Select", label: __("Company"), link:"Company", fieldname: "company",
+				default_value: __("Select Company..."),
+				filter: function(val, item, opts, me) {
+					if (item.company == val || val == opts.default_value) {
+						return me.apply_zero_filter(val, item, opts, me);
+					}
+					return false;
+				}},
+			{fieldtype: "Select", label: "Fiscal Year", link:"Fiscal Year", fieldname: "fiscal_year",
+				default_value: __("Select Fiscal Year...")},
+			{fieldtype: "Date", label: __("From Date"), fieldname: "from_date"},
+			{fieldtype: "Label", label: __("To")},
+			{fieldtype: "Date", label: __("To Date"), fieldname: "to_date"}
+		]
+	}
+	setup_columns() {
 		this.columns = [
 			{id: "name", name: __("Account"), field: "name", width: 300, cssClass: "cell-title"},
 			{id: "opening_dr", name: __("Opening (Dr)"), field: "opening_dr", width: 100,
@@ -50,25 +66,10 @@
 			{id: "closing_cr", name: __("Closing (Cr)"), field: "closing_cr", width: 100,
 				formatter: this.currency_formatter}
 		];
+	}
 
-	},
-	filters: [
-		{fieldtype: "Select", label: __("Company"), link:"Company", fieldname: "company",
-			default_value: __("Select Company..."),
-			filter: function(val, item, opts, me) {
-				if (item.company == val || val == opts.default_value) {
-					return me.apply_zero_filter(val, item, opts, me);
-				}
-				return false;
-			}},
-		{fieldtype: "Select", label: "Fiscal Year", link:"Fiscal Year", fieldname: "fiscal_year",
-			default_value: __("Select Fiscal Year...")},
-		{fieldtype: "Date", label: __("From Date"), fieldname: "from_date"},
-		{fieldtype: "Label", label: __("To")},
-		{fieldtype: "Date", label: __("To Date"), fieldname: "to_date"}
-	],
-	setup_filters: function() {
-		this._super();
+	setup_filters() {
+		super.setup_filters();
 		var me = this;
 		// default filters
 		this.filter_inputs.fiscal_year.change(function() {
@@ -83,8 +84,8 @@
 		});
 		me.show_zero_check()
 		if(me.ignore_closing_entry) me.ignore_closing_entry();
-	},
-	prepare_data: function() {
+	}
+	prepare_data() {
 		var me = this;
 		if(!this.primary_data) {
 			// make accounts list
@@ -113,12 +114,12 @@
 		this.set_indent();
 		this.prepare_balances();
 
-	},
-	init_account: function(d) {
+	}
+	init_account(d) {
 		this.reset_item_values(d);
-	},
+	}
 
-	prepare_balances: function() {
+	prepare_balances() {
 		var gl = frappe.report_dump.data['GL Entry'];
 		var me = this;
 
@@ -139,8 +140,8 @@
 		});
 
 		this.update_groups();
-	},
-	update_balances: function(account, posting_date, v) {
+	}
+	update_balances(account, posting_date, v) {
 		// opening
 		if (posting_date < this.opening_date || v.is_opening === "Yes") {
 			if (account.report_type === "Profit and Loss" &&
@@ -161,8 +162,8 @@
 		var closing_bal = flt(account.opening_dr) - flt(account.opening_cr) +
 			flt(account.debit) - flt(account.credit);
 		this.set_debit_or_credit(account, "closing", closing_bal);
-	},
-	set_debit_or_credit: function(account, field, balance) {
+	}
+	set_debit_or_credit(account, field, balance) {
 		if(balance > 0) {
 			account[field+"_dr"] = balance;
 			account[field+"_cr"] = 0;
@@ -170,8 +171,8 @@
 			account[field+"_cr"] = Math.abs(balance);
 			account[field+"_dr"] = 0;
 		}
-	},
-	update_groups: function() {
+	}
+	update_groups() {
 		// update groups
 		var me= this;
 		$.each(this.data, function(i, account) {
@@ -202,9 +203,9 @@
 				}
 			}
 		});
-	},
+	}
 
-	set_fiscal_year: function() {
+	set_fiscal_year() {
 		if (this.opening_date > this.closing_date) {
 			frappe.msgprint(__("Opening Date should be before Closing Date"));
 			return;
@@ -223,9 +224,9 @@
 			frappe.msgprint(__("Opening Date and Closing Date should be within same Fiscal Year"));
 			return;
 		}
-	},
+	}
 
-	show_general_ledger: function(account) {
+	show_general_ledger(account) {
 		frappe.route_options = {
 			account: account,
 			company: this.company,
@@ -234,4 +235,4 @@
 		};
 		frappe.set_route("query-report", "General Ledger");
 	}
-});
+};
diff --git a/erpnext/public/js/controllers/buying.js b/erpnext/public/js/controllers/buying.js
index 67b12fb..8ceae83 100644
--- a/erpnext/public/js/controllers/buying.js
+++ b/erpnext/public/js/controllers/buying.js
@@ -9,14 +9,14 @@
 
 cur_frm.email_field = "contact_email";
 
-erpnext.buying.BuyingController = erpnext.TransactionController.extend({
-	setup: function() {
-		this._super();
-	},
+erpnext.buying.BuyingController = class BuyingController extends erpnext.TransactionController {
+	setup() {
+		super.setup();
+	}
 
-	onload: function(doc, cdt, cdn) {
+	onload(doc, cdt, cdn) {
 		this.setup_queries(doc, cdt, cdn);
-		this._super();
+		super.onload();
 
 		this.frm.set_query('shipping_rule', function() {
 			return {
@@ -48,9 +48,9 @@
 			});
 		}
 		/* eslint-enable */
-	},
+	}
 
-	setup_queries: function(doc, cdt, cdn) {
+	setup_queries(doc, cdt, cdn) {
 		var me = this;
 
 		if(this.frm.fields_dict.buying_price_list) {
@@ -109,9 +109,9 @@
 				return me.set_query_for_item_tax_template(doc, cdt, cdn)
 			});
 		}
-	},
+	}
 
-	refresh: function(doc) {
+	refresh(doc) {
 		frappe.dynamic_link = {doc: this.frm.doc, fieldname: 'supplier', doctype: 'Supplier'};
 
 		this.frm.toggle_display("supplier_name",
@@ -122,38 +122,38 @@
 			this.set_from_product_bundle();
 		}
 
-		this._super();
-	},
+		super.refresh();
+	}
 
-	supplier: function() {
+	supplier() {
 		var me = this;
 		erpnext.utils.get_party_details(this.frm, null, null, function(){
 			me.apply_price_list();
 		});
-	},
+	}
 
-	supplier_address: function() {
+	supplier_address() {
 		erpnext.utils.get_address_display(this.frm);
 		erpnext.utils.set_taxes_from_address(this.frm, "supplier_address", "supplier_address", "supplier_address");
-	},
+	}
 
-	buying_price_list: function() {
+	buying_price_list() {
 		this.apply_price_list();
-	},
+	}
 
-	discount_percentage: function(doc, cdt, cdn) {
+	discount_percentage(doc, cdt, cdn) {
 		var item = frappe.get_doc(cdt, cdn);
 		item.discount_amount = 0.0;
 		this.price_list_rate(doc, cdt, cdn);
-	},
+	}
 
-	discount_amount: function(doc, cdt, cdn) {
+	discount_amount(doc, cdt, cdn) {
 		var item = frappe.get_doc(cdt, cdn);
 		item.discount_percentage = 0.0;
 		this.price_list_rate(doc, cdt, cdn);
-	},
+	}
 
-	qty: function(doc, cdt, cdn) {
+	qty(doc, cdt, cdn) {
 		var item = frappe.get_doc(cdt, cdn);
 		if ((doc.doctype == "Purchase Receipt") || (doc.doctype == "Purchase Invoice" && (doc.update_stock || doc.is_return))) {
 			frappe.model.round_floats_in(item, ["qty", "received_qty"]);
@@ -168,22 +168,22 @@
 			item.rejected_qty = flt(item.received_qty - item.qty, precision("rejected_qty", item));
 			item.received_stock_qty = flt(item.conversion_factor, precision("conversion_factor", item)) * flt(item.received_qty);
 		}
-		this._super(doc, cdt, cdn);
-	},
+		super.qty(doc, cdt, cdn);
+	}
 
-	batch_no: function(doc, cdt, cdn) {
-		this._super(doc, cdt, cdn);
-	},
+	batch_no(doc, cdt, cdn) {
+		super.batch_no(doc, cdt, cdn);
+	}
 
-	received_qty: function(doc, cdt, cdn) {
+	received_qty(doc, cdt, cdn) {
 		this.calculate_accepted_qty(doc, cdt, cdn)
-	},
+	}
 
-	rejected_qty: function(doc, cdt, cdn) {
+	rejected_qty(doc, cdt, cdn) {
 		this.calculate_accepted_qty(doc, cdt, cdn)
-	},
+	}
 
-	calculate_accepted_qty: function(doc, cdt, cdn){
+	calculate_accepted_qty(doc, cdt, cdn){
 		var item = frappe.get_doc(cdt, cdn);
 		frappe.model.round_floats_in(item, ["received_qty", "rejected_qty"]);
 
@@ -191,9 +191,9 @@
 
 		item.qty = flt(item.received_qty - item.rejected_qty, precision("qty", item));
 		this.qty(doc, cdt, cdn);
-	},
+	}
 
-	validate_negative_quantity: function(cdt, cdn, item, fieldnames){
+	validate_negative_quantity(cdt, cdn, item, fieldnames){
 		if(!item || !fieldnames) { return }
 
 		var is_negative_qty = false;
@@ -206,9 +206,9 @@
 		}
 
 		return is_negative_qty
-	},
+	}
 
-	warehouse: function(doc, cdt, cdn) {
+	warehouse(doc, cdt, cdn) {
 		var item = frappe.get_doc(cdt, cdn);
 		if(item.item_code && item.warehouse) {
 			return this.frm.call({
@@ -220,9 +220,9 @@
 				}
 			});
 		}
-	},
+	}
 
-	project: function(doc, cdt, cdn) {
+	project(doc, cdt, cdn) {
 		var item = frappe.get_doc(cdt, cdn);
 		if(item.project) {
 			$.each(this.frm.doc["items"] || [],
@@ -233,48 +233,48 @@
 					}
 				});
 		}
-	},
+	}
 
-	rejected_warehouse: function(doc, cdt) {
+	rejected_warehouse(doc, cdt) {
 		// trigger autofill_warehouse only if parent rejected_warehouse field is triggered
 		if (["Purchase Invoice", "Purchase Receipt"].includes(cdt)) {
 			this.autofill_warehouse(doc.items, "rejected_warehouse", doc.rejected_warehouse);
 		}
-	},
+	}
 
-	category: function(doc, cdt, cdn) {
+	category(doc, cdt, cdn) {
 		// should be the category field of tax table
 		if(cdt != doc.doctype) {
 			this.calculate_taxes_and_totals();
 		}
-	},
-	add_deduct_tax: function(doc, cdt, cdn) {
+	}
+	add_deduct_tax(doc, cdt, cdn) {
 		this.calculate_taxes_and_totals();
-	},
+	}
 
-	set_from_product_bundle: function() {
+	set_from_product_bundle() {
 		var me = this;
 		this.frm.add_custom_button(__("Product Bundle"), function() {
 			erpnext.buying.get_items_from_product_bundle(me.frm);
 		}, __("Get Items From"));
-	},
+	}
 
-	shipping_address: function(){
+	shipping_address(){
 		var me = this;
 		erpnext.utils.get_address_display(this.frm, "shipping_address",
 			"shipping_address_display", true);
-	},
+	}
 
-	billing_address: function() {
+	billing_address() {
 		erpnext.utils.get_address_display(this.frm, "billing_address",
 			"billing_address_display", true);
-	},
+	}
 
-	tc_name: function() {
+	tc_name() {
 		this.get_terms();
-	},
+	}
 
-	update_auto_repeat_reference: function(doc) {
+	update_auto_repeat_reference(doc) {
 		if (doc.auto_repeat) {
 			frappe.call({
 				method:"frappe.automation.doctype.auto_repeat.auto_repeat.update_reference",
@@ -291,9 +291,9 @@
 				}
 			})
 		}
-	},
+	}
 
-	manufacturer: function(doc, cdt, cdn) {
+	manufacturer(doc, cdt, cdn) {
 		const row = locals[cdt][cdn];
 
 		if(row.manufacturer) {
@@ -310,9 +310,9 @@
 				}
 			});
 		}
-	},
+	}
 
-	manufacturer_part_no: function(doc, cdt, cdn) {
+	manufacturer_part_no(doc, cdt, cdn) {
 		const row = locals[cdt][cdn];
 
 		if (row.manufacturer_part_no) {
@@ -335,7 +335,7 @@
 
 			}
 		}
-});
+};
 
 cur_frm.add_fetch('project', 'cost_center', 'cost_center');
 
@@ -496,4 +496,4 @@
 	});
 
 	dialog.show();
-}
\ No newline at end of file
+}
diff --git a/erpnext/public/js/controllers/stock_controller.js b/erpnext/public/js/controllers/stock_controller.js
index 87b21b7..d346357 100644
--- a/erpnext/public/js/controllers/stock_controller.js
+++ b/erpnext/public/js/controllers/stock_controller.js
@@ -3,22 +3,22 @@
 
 frappe.provide("erpnext.stock");
 
-erpnext.stock.StockController = frappe.ui.form.Controller.extend({
-	onload: function() {
+erpnext.stock.StockController = class StockController extends frappe.ui.form.Controller {
+	onload() {
 		// warehouse query if company
 		if (this.frm.fields_dict.company) {
 			this.setup_warehouse_query();
 		}
-	},
+	}
 
-	setup_warehouse_query: function() {
+	setup_warehouse_query() {
 		var me = this;
 		erpnext.queries.setup_queries(this.frm, "Warehouse", function() {
 			return erpnext.queries.warehouse(me.frm.doc);
 		});
-	},
+	}
 
-	setup_posting_date_time_check: function() {
+	setup_posting_date_time_check() {
 		// make posting date default and read only unless explictly checked
 		frappe.ui.form.on(this.frm.doctype, 'set_posting_date_and_time_read_only', function(frm) {
 			if(frm.doc.docstatus == 0 && frm.doc.set_posting_time) {
@@ -46,9 +46,9 @@
 				frm.trigger('set_posting_date_and_time_read_only');
 			}
 		});
-	},
+	}
 
-	show_stock_ledger: function() {
+	show_stock_ledger() {
 		var me = this;
 		if(this.frm.doc.docstatus > 0) {
 			cur_frm.add_custom_button(__("Stock Ledger"), function() {
@@ -63,9 +63,9 @@
 			}, __("View"));
 		}
 
-	},
+	}
 
-	show_general_ledger: function() {
+	show_general_ledger() {
 		var me = this;
 		if(this.frm.doc.docstatus > 0) {
 			cur_frm.add_custom_button(__('Accounting Ledger'), function() {
@@ -81,4 +81,4 @@
 			}, __("View"));
 		}
 	}
-});
+};
diff --git a/erpnext/public/js/controllers/taxes_and_totals.js b/erpnext/public/js/controllers/taxes_and_totals.js
index 3a3ee38..448bb65 100644
--- a/erpnext/public/js/controllers/taxes_and_totals.js
+++ b/erpnext/public/js/controllers/taxes_and_totals.js
@@ -1,12 +1,12 @@
 // Copyright (c) 2015, Frappe Technologies Pvt. Ltd. and Contributors
 // License: GNU General Public License v3. See license.txt
 
-erpnext.taxes_and_totals = erpnext.payments.extend({
-	setup: function() {
+erpnext.taxes_and_totals = class taxes_and_totals extends erpnext.payments {
+	setup() {
 		this.fetch_round_off_accounts();
-	},
+	}
 
-	apply_pricing_rule_on_item: function(item) {
+	apply_pricing_rule_on_item(item) {
 		let effective_item_rate = item.price_list_rate;
 		let item_rate = item.rate;
 		if (in_list(["Sales Order", "Quotation"], item.parenttype) && item.blanket_order_rate) {
@@ -32,9 +32,9 @@
 		}
 
 		frappe.model.set_value(item.doctype, item.name, "rate", item_rate);
-	},
+	}
 
-	calculate_taxes_and_totals: function(update_paid_amount) {
+	calculate_taxes_and_totals(update_paid_amount) {
 		this.discount_amount_applied = false;
 		this._calculate_taxes_and_totals();
 		this.calculate_discount_amount();
@@ -63,16 +63,16 @@
 		}
 
 		this.frm.refresh_fields();
-	},
+	}
 
-	calculate_discount_amount: function(){
+	calculate_discount_amount(){
 		if (frappe.meta.get_docfield(this.frm.doc.doctype, "discount_amount")) {
 			this.set_discount_amount();
 			this.apply_discount_amount();
 		}
-	},
+	}
 
-	_calculate_taxes_and_totals: function() {
+	_calculate_taxes_and_totals() {
 		this.validate_conversion_rate();
 		this.calculate_item_values();
 		this.initialize_taxes();
@@ -82,9 +82,9 @@
 		this.manipulate_grand_total_for_inclusive_tax();
 		this.calculate_totals();
 		this._cleanup();
-	},
+	}
 
-	validate_conversion_rate: function() {
+	validate_conversion_rate() {
 		this.frm.doc.conversion_rate = flt(this.frm.doc.conversion_rate, (cur_frm) ? precision("conversion_rate") : 9);
 		var conversion_rate_label = frappe.meta.get_label(this.frm.doc.doctype, "conversion_rate",
 			this.frm.doc.name);
@@ -99,9 +99,9 @@
 				frappe.throw(err_message);
 			}
 		}
-	},
+	}
 
-	calculate_item_values: function() {
+	calculate_item_values() {
 		var me = this;
 		if (!this.discount_amount_applied) {
 			$.each(this.frm.doc["items"] || [], function(i, item) {
@@ -121,16 +121,16 @@
 				me.set_in_company_currency(item, ["price_list_rate", "rate", "amount", "net_rate", "net_amount"]);
 			});
 		}
-	},
+	}
 
-	set_in_company_currency: function(doc, fields) {
+	set_in_company_currency(doc, fields) {
 		var me = this;
 		$.each(fields, function(i, f) {
 			doc["base_"+f] = flt(flt(doc[f], precision(f, doc)) * me.frm.doc.conversion_rate, precision("base_" + f, doc));
 		});
-	},
+	}
 
-	initialize_taxes: function() {
+	initialize_taxes() {
 		var me = this;
 
 		$.each(this.frm.doc["taxes"] || [], function(i, tax) {
@@ -152,9 +152,9 @@
 			}
 			frappe.model.round_floats_in(tax);
 		});
-	},
+	}
 
-	fetch_round_off_accounts: function() {
+	fetch_round_off_accounts() {
 		let me = this;
 		frappe.flags.round_off_applicable_accounts = [];
 
@@ -170,9 +170,9 @@
 				}
 			});
 		}
-	},
+	}
 
-	determine_exclusive_rate: function() {
+	determine_exclusive_rate() {
 		var me = this;
 
 		var has_inclusive_tax = false;
@@ -210,9 +210,9 @@
 				me.set_in_company_currency(item, ["net_rate", "net_amount"]);
 			}
 		});
-	},
+	}
 
-	get_current_tax_fraction: function(tax, item_tax_map) {
+	get_current_tax_fraction(tax, item_tax_map) {
 		// Get tax fraction for calculating tax exclusive amount
 		// from tax inclusive amount
 		var current_tax_fraction = 0.0;
@@ -241,14 +241,14 @@
 			inclusive_tax_amount_per_qty *= -1;
 		}
 		return [current_tax_fraction, inclusive_tax_amount_per_qty];
-	},
+	}
 
-	_get_tax_rate: function(tax, item_tax_map) {
+	_get_tax_rate(tax, item_tax_map) {
 		return (Object.keys(item_tax_map).indexOf(tax.account_head) != -1) ?
 			flt(item_tax_map[tax.account_head], precision("rate", tax)) : tax.rate;
-	},
+	}
 
-	calculate_net_total: function() {
+	calculate_net_total() {
 		var me = this;
 		this.frm.doc.total_qty = this.frm.doc.total = this.frm.doc.base_total = this.frm.doc.net_total = this.frm.doc.base_net_total = 0.0;
 
@@ -261,9 +261,9 @@
 			});
 
 		frappe.model.round_floats_in(this.frm.doc, ["total", "base_total", "net_total", "base_net_total"]);
-	},
+	}
 
-	calculate_taxes: function() {
+	calculate_taxes() {
 		var me = this;
 		this.frm.doc.rounding_adjustment = 0;
 		var actual_tax_dict = {};
@@ -339,9 +339,9 @@
 				}
 			});
 		});
-	},
+	}
 
-	set_cumulative_total: function(row_idx, tax) {
+	set_cumulative_total(row_idx, tax) {
 		var tax_amount = tax.tax_amount_after_discount_amount;
 		if (tax.category == 'Valuation') {
 			tax_amount = 0;
@@ -354,13 +354,13 @@
 		} else {
 			tax.total = flt(this.frm.doc["taxes"][row_idx-1].total + tax_amount, precision("total", tax));
 		}
-	},
+	}
 
-	_load_item_tax_rate: function(item_tax_rate) {
+	_load_item_tax_rate(item_tax_rate) {
 		return item_tax_rate ? JSON.parse(item_tax_rate) : {};
-	},
+	}
 
-	get_current_tax_amount: function(item, tax, item_tax_map) {
+	get_current_tax_amount(item, tax, item_tax_map) {
 		var tax_rate = this._get_tax_rate(tax, item_tax_map);
 		var current_tax_amount = 0.0;
 
@@ -397,17 +397,17 @@
 		this.set_item_wise_tax(item, tax, tax_rate, current_tax_amount);
 
 		return current_tax_amount;
-	},
+	}
 
-	get_final_tax_amount: function(tax, current_tax_amount) {
+	get_final_tax_amount(tax, current_tax_amount) {
 		if (frappe.flags.round_off_applicable_accounts.includes(tax.account_head)) {
 			current_tax_amount = Math.round(current_tax_amount);
 		}
 
 		return current_tax_amount;
-	},
+	}
 
-	set_item_wise_tax: function(item, tax, tax_rate, current_tax_amount) {
+	set_item_wise_tax(item, tax, tax_rate, current_tax_amount) {
 		// store tax breakup for each item
 		let tax_detail = tax.item_wise_tax_detail;
 		let key = item.item_code || item.item_name;
@@ -417,14 +417,14 @@
 			item_wise_tax_amount += tax_detail[key][1];
 
 		tax_detail[key] = [tax_rate, flt(item_wise_tax_amount, precision("base_tax_amount", tax))];
-	},
+	}
 
-	round_off_totals: function(tax) {
+	round_off_totals(tax) {
 		tax.tax_amount = flt(tax.tax_amount, precision("tax_amount", tax));
 		tax.tax_amount_after_discount_amount = flt(tax.tax_amount_after_discount_amount, precision("tax_amount", tax));
-	},
+	}
 
-	manipulate_grand_total_for_inclusive_tax: function() {
+	manipulate_grand_total_for_inclusive_tax() {
 		var me = this;
 		// if fully inclusive taxes and diff
 		if (this.frm.doc["taxes"] && this.frm.doc["taxes"].length) {
@@ -455,9 +455,9 @@
 				}
 			}
 		}
-	},
+	}
 
-	calculate_totals: function() {
+	calculate_totals() {
 		// Changing sequence can cause rounding_adjustmentng issue and on-screen discrepency
 		var me = this;
 		var tax_count = this.frm.doc["taxes"] ? this.frm.doc["taxes"].length : 0;
@@ -503,9 +503,9 @@
 
 		// rounded totals
 		this.set_rounded_total();
-	},
+	}
 
-	set_rounded_total: function() {
+	set_rounded_total() {
 		var disable_rounded_total = 0;
 		if(frappe.meta.get_docfield(this.frm.doc.doctype, "disable_rounded_total", this.frm.doc.name)) {
 			disable_rounded_total = this.frm.doc.disable_rounded_total;
@@ -527,9 +527,9 @@
 
 			this.set_in_company_currency(this.frm.doc, ["rounding_adjustment", "rounded_total"]);
 		}
-	},
+	}
 
-	_cleanup: function() {
+	_cleanup() {
 		this.frm.doc.base_in_words = this.frm.doc.in_words = "";
 
 		if(this.frm.doc["items"] && this.frm.doc["items"].length) {
@@ -556,16 +556,16 @@
 				tax.item_wise_tax_detail = JSON.stringify(tax.item_wise_tax_detail);
 			});
 		}
-	},
+	}
 
-	set_discount_amount: function() {
+	set_discount_amount() {
 		if(this.frm.doc.additional_discount_percentage) {
 			this.frm.doc.discount_amount = flt(flt(this.frm.doc[frappe.scrub(this.frm.doc.apply_discount_on)])
 				* this.frm.doc.additional_discount_percentage / 100, precision("discount_amount"));
 		}
-	},
+	}
 
-	apply_discount_amount: function() {
+	apply_discount_amount() {
 		var me = this;
 		var distributed_amount = 0.0;
 		this.frm.doc.base_discount_amount = 0.0;
@@ -603,9 +603,9 @@
 				this._calculate_taxes_and_totals();
 			}
 		}
-	},
+	}
 
-	get_total_for_discount_amount: function() {
+	get_total_for_discount_amount() {
 		if(this.frm.doc.apply_discount_on == "Net Total") {
 			return this.frm.doc.net_total;
 		} else {
@@ -629,27 +629,27 @@
 
 			return flt(this.frm.doc.grand_total - total_actual_tax, precision("grand_total"));
 		}
-	},
+	}
 
-	calculate_total_advance: function(update_paid_amount) {
+	calculate_total_advance(update_paid_amount) {
 		var total_allocated_amount = frappe.utils.sum($.map(this.frm.doc["advances"] || [], function(adv) {
 			return flt(adv.allocated_amount, precision("allocated_amount", adv));
 		}));
 		this.frm.doc.total_advance = flt(total_allocated_amount, precision("total_advance"));
 
 		this.calculate_outstanding_amount(update_paid_amount);
-	},
+	}
 
-	is_internal_invoice: function() {
+	is_internal_invoice() {
 		if (['Sales Invoice', 'Purchase Invoice'].includes(this.frm.doc.doctype)) {
 			if (this.frm.doc.company === this.frm.doc.represents_company) {
 				return true;
 			}
 		}
 		return false;
-	},
+	}
 
-	calculate_outstanding_amount: function(update_paid_amount) {
+	calculate_outstanding_amount(update_paid_amount) {
 		// NOTE:
 		// paid_amount and write_off_amount is only for POS/Loyalty Point Redemption Invoice
 		// total_advance is only for non POS Invoice
@@ -697,9 +697,9 @@
 			this.frm.doc.outstanding_amount =  flt(total_amount_to_pay - flt(paid_amount) +
 				flt(this.frm.doc.change_amount * this.frm.doc.conversion_rate), precision("outstanding_amount"));
 		}
-	},
+	}
 
-	update_paid_amount_for_return: function() {
+	update_paid_amount_for_return() {
 		var grand_total = this.frm.doc.rounded_total || this.frm.doc.grand_total;
 
 		if(this.frm.doc.party_account_currency == this.frm.doc.currency) {
@@ -723,9 +723,9 @@
 		this.frm.refresh_fields();
 
 		this.calculate_paid_amount();
-	},
+	}
 
-	set_default_payment: function(total_amount_to_pay, update_paid_amount) {
+	set_default_payment(total_amount_to_pay, update_paid_amount) {
 		var me = this;
 		var payment_status = true;
 		if(this.frm.doc.is_pos && (update_paid_amount===undefined || update_paid_amount)) {
@@ -741,9 +741,9 @@
 				}
 			});
 		}
-	},
+	}
 
-	calculate_paid_amount: function() {
+	calculate_paid_amount() {
 		var me = this;
 		var paid_amount = 0.0;
 		var base_paid_amount = 0.0;
@@ -763,9 +763,9 @@
 
 		this.frm.set_value('paid_amount', flt(paid_amount, precision("paid_amount")));
 		this.frm.set_value('base_paid_amount', flt(base_paid_amount, precision("base_paid_amount")));
-	},
+	}
 
-	calculate_change_amount: function(){
+	calculate_change_amount(){
 		this.frm.doc.change_amount = 0.0;
 		this.frm.doc.base_change_amount = 0.0;
 		if(in_list(["Sales Invoice", "POS Invoice"], this.frm.doc.doctype)
@@ -784,9 +784,9 @@
 					precision("base_change_amount"));
 			}
 		}
-	},
+	}
 
-	calculate_write_off_amount: function(){
+	calculate_write_off_amount(){
 		if(this.frm.doc.paid_amount > this.frm.doc.grand_total){
 			this.frm.doc.write_off_amount = flt(this.frm.doc.grand_total - this.frm.doc.paid_amount
 				+ this.frm.doc.change_amount, precision("write_off_amount"));
@@ -798,4 +798,4 @@
 		}
 		this.calculate_outstanding_amount(false);
 	}
-});
+};
diff --git a/erpnext/public/js/controllers/transaction.js b/erpnext/public/js/controllers/transaction.js
index 1c0abdf..a4c165e 100644
--- a/erpnext/public/js/controllers/transaction.js
+++ b/erpnext/public/js/controllers/transaction.js
@@ -3,9 +3,9 @@
 
 frappe.provide('erpnext.accounts.dimensions');
 
-erpnext.TransactionController = erpnext.taxes_and_totals.extend({
-	setup: function() {
-		this._super();
+erpnext.TransactionController = class TransactionController extends erpnext.taxes_and_totals {
+	setup() {
+		super.setup();
 		frappe.flags.hide_serial_batch_dialog = true;
 		frappe.ui.form.on(this.frm.doctype + " Item", "rate", function(frm, cdt, cdn) {
 			var item = frappe.get_doc(cdt, cdn);
@@ -222,8 +222,8 @@
 			});
 		}
 
-	},
-	onload: function() {
+	}
+	onload() {
 		var me = this;
 
 		if(this.frm.doc.__islocal) {
@@ -249,15 +249,15 @@
 				}
 			]);
 		}
-	},
+	}
 
-	is_return: function() {
+	is_return() {
 		if(!this.frm.doc.is_return && this.frm.doc.return_against) {
 			this.frm.set_value('return_against', '');
 		}
-	},
+	}
 
-	setup_quality_inspection: function() {
+	setup_quality_inspection() {
 		if(!in_list(["Delivery Note", "Sales Invoice", "Purchase Receipt", "Purchase Invoice"], this.frm.doc.doctype)) {
 			return;
 		}
@@ -290,9 +290,9 @@
 				}
 			}
 		});
-	},
+	}
 
-	make_payment_request: function() {
+	make_payment_request() {
 		var me = this;
 		const payment_request_type = (in_list(['Sales Order', 'Sales Invoice'], this.frm.doc.doctype))
 			? "Inward" : "Outward";
@@ -314,9 +314,9 @@
 				}
 			}
 		})
-	},
+	}
 
-	onload_post_render: function() {
+	onload_post_render() {
 		if(this.frm.doc.__islocal && !(this.frm.doc.taxes || []).length
 			&& !(this.frm.doc.__onload ? this.frm.doc.__onload.load_after_mapping : false)) {
 			frappe.after_ajax(() => this.apply_default_taxes());
@@ -328,9 +328,9 @@
 			this.setup_item_selector();
 			this.frm.get_field("items").grid.set_multiple_add("item_code", "qty");
 		}
-	},
+	}
 
-	refresh: function() {
+	refresh() {
 		erpnext.toggle_naming_series();
 		erpnext.hide_company();
 		this.set_dynamic_labels();
@@ -360,9 +360,9 @@
 					.appendTo($input_group);
 			}
 		}
-	},
+	}
 
-	scan_barcode: function() {
+	scan_barcode() {
 		let scan_barcode_field = this.frm.fields_dict["scan_barcode"];
 
 		let show_description = function(idx, exist = null) {
@@ -434,9 +434,9 @@
 			});
 		}
 		return false;
-	},
+	}
 
-	apply_default_taxes: function() {
+	apply_default_taxes() {
 		var me = this;
 		var taxes_and_charges_field = frappe.meta.get_docfield(me.frm.doc.doctype, "taxes_and_charges",
 			me.frm.doc.name);
@@ -475,22 +475,22 @@
 				}
 			});
 		}
-	},
+	}
 
-	setup_sms: function() {
+	setup_sms() {
 		var me = this;
 		let blacklist = ['Purchase Invoice', 'BOM'];
 		if(this.frm.doc.docstatus===1 && !in_list(["Lost", "Stopped", "Closed"], this.frm.doc.status)
 			&& !blacklist.includes(this.frm.doctype)) {
 			this.frm.page.add_menu_item(__('Send SMS'), function() { me.send_sms(); });
 		}
-	},
+	}
 
-	send_sms: function() {
+	send_sms() {
 		var sms_man = new erpnext.SMSManager(this.frm.doc);
-	},
+	}
 
-	barcode: function(doc, cdt, cdn) {
+	barcode(doc, cdt, cdn) {
 		var d = locals[cdt][cdn];
 		if(d.barcode=="" || d.barcode==null) {
 			// barcode cleared, remove item
@@ -499,9 +499,9 @@
 
 		this.frm.from_barcode = this.frm.from_barcode ? this.frm.from_barcode + 1 : 1;
 		this.item_code(doc, cdt, cdn);
-	},
+	}
 
-	item_code: function(doc, cdt, cdn) {
+	item_code(doc, cdt, cdn) {
 		var me = this;
 		var item = frappe.get_doc(cdt, cdn);
 		var update_stock = 0, show_batch_dialog = 0;
@@ -647,9 +647,9 @@
 				});
 			}
 		}
-	},
+	}
 
-	price_list_rate: function(doc, cdt, cdn) {
+	price_list_rate(doc, cdt, cdn) {
 		var item = frappe.get_doc(cdt, cdn);
 		frappe.model.round_floats_in(item, ["price_list_rate", "discount_percentage"]);
 
@@ -661,17 +661,17 @@
 				precision("rate", item));
 
 		this.calculate_taxes_and_totals();
-	},
+	}
 
-	margin_rate_or_amount: function(doc, cdt, cdn) {
+	margin_rate_or_amount(doc, cdt, cdn) {
 		// calculated the revised total margin and rate on margin rate changes
 		let item = frappe.get_doc(cdt, cdn);
 		this.apply_pricing_rule_on_item(item);
 		this.calculate_taxes_and_totals();
 		cur_frm.refresh_fields();
-	},
+	}
 
-	margin_type: function(doc, cdt, cdn) {
+	margin_type(doc, cdt, cdn) {
 		// calculate the revised total margin and rate on margin type changes
 		let item = frappe.get_doc(cdt, cdn);
 		if (!item.margin_type) {
@@ -681,9 +681,9 @@
 			this.calculate_taxes_and_totals();
 			cur_frm.refresh_fields();
 		}
-	},
+	}
 
-	get_incoming_rate: function(item, posting_date, posting_time, voucher_type, company) {
+	get_incoming_rate(item, posting_date, posting_time, voucher_type, company) {
 
 		let item_args = {
 			'item_code': item.item_code,
@@ -706,9 +706,9 @@
 				frappe.model.set_value(item.doctype, item.name, 'rate', r.message * item.conversion_factor);
 			}
 		});
-	},
+	}
 
-	add_taxes_from_item_tax_template: function(item_tax_map) {
+	add_taxes_from_item_tax_template(item_tax_map) {
 		let me = this;
 
 		if(item_tax_map && cint(frappe.defaults.get_default("add_taxes_from_item_tax_template"))) {
@@ -726,9 +726,9 @@
 				}
 			});
 		}
-	},
+	}
 
-	serial_no: function(doc, cdt, cdn) {
+	serial_no(doc, cdt, cdn) {
 		var me = this;
 		var item = frappe.get_doc(cdt, cdn);
 
@@ -763,17 +763,17 @@
 				}
 			}
 		}
-	},
+	}
 
-	validate: function() {
+	validate() {
 		this.calculate_taxes_and_totals(false);
-	},
+	}
 
-	update_stock: function() {
+	update_stock() {
 		this.frm.trigger('set_default_internal_warehouse');
-	},
+	}
 
-	set_default_internal_warehouse: function() {
+	set_default_internal_warehouse() {
 		let me = this;
 		if ((this.frm.doc.doctype === 'Sales Invoice' && me.frm.doc.update_stock)
 			|| this.frm.doc.doctype == 'Delivery Note') {
@@ -792,9 +792,9 @@
 				});
 			}
 		}
-	},
+	}
 
-	company: function() {
+	company() {
 		var me = this;
 		var set_pricing = function() {
 			if(me.frm.doc.company && me.frm.fields_dict.currency) {
@@ -901,16 +901,16 @@
 		if(this.frm.doc.company) {
 			erpnext.last_selected_company = this.frm.doc.company;
 		}
-	},
+	}
 
-	transaction_date: function() {
+	transaction_date() {
 		if (this.frm.doc.transaction_date) {
 			this.frm.transaction_date = this.frm.doc.transaction_date;
 			frappe.ui.form.trigger(this.frm.doc.doctype, "currency");
 		}
-	},
+	}
 
-	posting_date: function() {
+	posting_date() {
 		var me = this;
 		if (this.frm.doc.posting_date) {
 			this.frm.posting_date = this.frm.doc.posting_date;
@@ -939,9 +939,9 @@
 				frappe.ui.form.trigger(me.frm.doc.doctype, "currency");
 			}
 		}
-	},
+	}
 
-	due_date: function() {
+	due_date() {
 		// due_date is to be changed, payment terms template and/or payment schedule must
 		// be removed as due_date is automatically changed based on payment terms
 		if (this.frm.doc.due_date && !this.frm.updating_party_details && !this.frm.doc.is_pos) {
@@ -964,13 +964,13 @@
 				frappe.msgprint(final_message);
 			}
 		}
-	},
+	}
 
-	bill_date: function() {
+	bill_date() {
 		this.posting_date();
-	},
+	}
 
-	recalculate_terms: function() {
+	recalculate_terms() {
 		const doc = this.frm.doc;
 		if (doc.payment_terms_template) {
 			this.payment_terms_template();
@@ -989,17 +989,17 @@
 				}
 			);
 		}
-	},
+	}
 
-	get_company_currency: function() {
+	get_company_currency() {
 		return erpnext.get_currency(this.frm.doc.company);
-	},
+	}
 
-	contact_person: function() {
+	contact_person() {
 		erpnext.utils.get_contact_details(this.frm);
-	},
+	}
 
-	currency: function() {
+	currency() {
 		/* manqala 19/09/2016: let the translation date be whichever of the transaction_date or posting_date is available */
 		var transaction_date = this.frm.doc.transaction_date || this.frm.doc.posting_date;
 		/* end manqala */
@@ -1021,9 +1021,9 @@
 		} else {
 			this.conversion_rate();
 		}
-	},
+	}
 
-	conversion_rate: function() {
+	conversion_rate() {
 		const me = this.frm;
 		if(this.frm.doc.currency === this.get_company_currency()) {
 			this.frm.set_value("conversion_rate", 1.0);
@@ -1043,9 +1043,9 @@
 		}
 		// Make read only if Accounts Settings doesn't allow stale rates
 		this.frm.set_df_property("conversion_rate", "read_only", erpnext.stale_rate_allowed() ? 0 : 1);
-	},
+	}
 
-	shipping_rule: function() {
+	shipping_rule() {
 		var me = this;
 		if(this.frm.doc.shipping_rule) {
 			return this.frm.call({
@@ -1061,9 +1061,9 @@
 		else {
 			me.calculate_taxes_and_totals();
 		}
-	},
+	}
 
-	set_margin_amount_based_on_currency: function(exchange_rate) {
+	set_margin_amount_based_on_currency(exchange_rate) {
 		if (in_list(["Quotation", "Sales Order", "Delivery Note", "Sales Invoice", "Purchase Invoice", "Purchase Order", "Purchase Receipt"]), this.frm.doc.doctype) {
 			var me = this;
 			$.each(this.frm.doc.items || [], function(i, d) {
@@ -1073,9 +1073,9 @@
 				}
 			});
 		}
-	},
+	}
 
-	set_actual_charges_based_on_currency: function(exchange_rate) {
+	set_actual_charges_based_on_currency(exchange_rate) {
 		var me = this;
 		$.each(this.frm.doc.taxes || [], function(i, d) {
 			if(d.charge_type == "Actual") {
@@ -1083,9 +1083,9 @@
 					flt(d.tax_amount) / flt(exchange_rate));
 			}
 		});
-	},
+	}
 
-	get_exchange_rate: function(transaction_date, from_currency, to_currency, callback) {
+	get_exchange_rate(transaction_date, from_currency, to_currency, callback) {
 		var args;
 		if (["Quotation", "Sales Order", "Delivery Note", "Sales Invoice"].includes(this.frm.doctype)) {
 			args = "for_selling";
@@ -1107,9 +1107,9 @@
 				callback(flt(r.message));
 			}
 		});
-	},
+	}
 
-	price_list_currency: function() {
+	price_list_currency() {
 		var me=this;
 		this.set_dynamic_labels();
 
@@ -1123,9 +1123,9 @@
 		} else {
 			this.plc_conversion_rate();
 		}
-	},
+	}
 
-	plc_conversion_rate: function() {
+	plc_conversion_rate() {
 		if(this.frm.doc.price_list_currency === this.get_company_currency()) {
 			this.frm.set_value("plc_conversion_rate", 1.0);
 		} else if(this.frm.doc.price_list_currency === this.frm.doc.currency
@@ -1137,9 +1137,9 @@
 		if(!this.in_apply_price_list) {
 			this.apply_price_list(null, true);
 		}
-	},
+	}
 
-	uom: function(doc, cdt, cdn) {
+	uom(doc, cdt, cdn) {
 		var me = this;
 		var item = frappe.get_doc(cdt, cdn);
 		if(item.item_code && item.uom) {
@@ -1157,9 +1157,9 @@
 			});
 		}
 		me.calculate_stock_uom_rate(doc, cdt, cdn);
-	},
+	}
 
-	conversion_factor: function(doc, cdt, cdn, dont_fetch_price_list_rate) {
+	conversion_factor(doc, cdt, cdn, dont_fetch_price_list_rate) {
 		if(frappe.meta.get_docfield(cdt, "stock_qty", cdn)) {
 			var item = frappe.get_doc(cdt, cdn);
 			frappe.model.round_floats_in(item, ["qty", "conversion_factor"]);
@@ -1179,35 +1179,35 @@
 			}
 			this.calculate_stock_uom_rate(doc, cdt, cdn);
 		}
-	},
+	}
 
-	batch_no: function(doc, cdt, cdn) {
+	batch_no(doc, cdt, cdn) {
 		let item = frappe.get_doc(cdt, cdn);
 		this.apply_price_list(item, true);
-	},
+	}
 
-	toggle_conversion_factor: function(item) {
+	toggle_conversion_factor(item) {
 		// toggle read only property for conversion factor field if the uom and stock uom are same
 		if(this.frm.get_field('items').grid.fields_map.conversion_factor) {
 			this.frm.fields_dict.items.grid.toggle_enable("conversion_factor",
 				((item.uom != item.stock_uom) && !frappe.meta.get_docfield(cur_frm.fields_dict.items.grid.doctype, "conversion_factor").read_only)? true: false);
 		}
 
-	},
+	}
 
-	qty: function(doc, cdt, cdn) {
+	qty(doc, cdt, cdn) {
 		let item = frappe.get_doc(cdt, cdn);
 		this.conversion_factor(doc, cdt, cdn, true);
 		this.calculate_stock_uom_rate(doc, cdt, cdn);
 		this.apply_pricing_rule(item, true);
-	},
+	}
 
-	calculate_stock_uom_rate: function(doc, cdt, cdn) {
+	calculate_stock_uom_rate(doc, cdt, cdn) {
 		let item = frappe.get_doc(cdt, cdn);
-		item.stock_uom_rate = flt(item.rate)/flt(item.conversion_factor);	
+		item.stock_uom_rate = flt(item.rate)/flt(item.conversion_factor);
 		refresh_field("stock_uom_rate", item.name, item.parentfield);
-	},
-	service_stop_date: function(frm, cdt, cdn) {
+	}
+	service_stop_date(frm, cdt, cdn) {
 		var child = locals[cdt][cdn];
 
 		if(child.service_stop_date) {
@@ -1223,9 +1223,9 @@
 				frappe.throw(__("Service Stop Date cannot be after Service End Date"));
 			}
 		}
-	},
+	}
 
-	service_start_date: function(frm, cdt, cdn) {
+	service_start_date(frm, cdt, cdn) {
 		var child = locals[cdt][cdn];
 
 		if(child.service_start_date) {
@@ -1237,9 +1237,9 @@
 				}
 			})
 		}
-	},
+	}
 
-	calculate_net_weight: function(){
+	calculate_net_weight(){
 		/* Calculate Total Net Weight then further applied shipping rule to calculate shipping charges.*/
 		var me = this;
 		this.frm.doc.total_net_weight= 0.0;
@@ -1249,9 +1249,9 @@
 		});
 		refresh_field("total_net_weight");
 		this.shipping_rule();
-	},
+	}
 
-	set_dynamic_labels: function() {
+	set_dynamic_labels() {
 		// What TODO? should we make price list system non-mandatory?
 		this.frm.toggle_reqd("plc_conversion_rate",
 			!!(this.frm.doc.price_list_name && this.frm.doc.price_list_currency));
@@ -1260,9 +1260,9 @@
 		this.change_form_labels(company_currency);
 		this.change_grid_labels(company_currency);
 		this.frm.refresh_fields();
-	},
+	}
 
-	change_form_labels: function(company_currency) {
+	change_form_labels(company_currency) {
 		var me = this;
 
 		this.frm.set_currency_labels(["base_total", "base_net_total", "base_total_taxes_and_charges",
@@ -1309,9 +1309,9 @@
 		if(frappe.meta.get_docfield(cur_frm.doctype, "base_net_total"))
 			cur_frm.toggle_display("base_net_total", (show && (me.frm.doc.currency != company_currency)));
 
-	},
+	}
 
-	change_grid_labels: function(company_currency) {
+	change_grid_labels(company_currency) {
 		var me = this;
 
 		this.frm.set_currency_labels(["base_rate", "base_net_rate", "base_price_list_rate", "base_amount", "base_net_amount", "base_rate_with_margin"],
@@ -1375,21 +1375,21 @@
 
 		// set labels
 		var $wrapper = $(this.frm.wrapper);
-	},
+	}
 
-	recalculate: function() {
+	recalculate() {
 		this.calculate_taxes_and_totals();
-	},
+	}
 
-	recalculate_values: function() {
+	recalculate_values() {
 		this.calculate_taxes_and_totals();
-	},
+	}
 
-	calculate_charges: function() {
+	calculate_charges() {
 		this.calculate_taxes_and_totals();
-	},
+	}
 
-	ignore_pricing_rule: function() {
+	ignore_pricing_rule() {
 		if(this.frm.doc.ignore_pricing_rule) {
 			var me = this;
 			var item_list = [];
@@ -1423,9 +1423,9 @@
 		} else {
 			this.apply_pricing_rule();
 		}
-	},
+	}
 
-	apply_pricing_rule: function(item, calculate_taxes_and_totals) {
+	apply_pricing_rule(item, calculate_taxes_and_totals) {
 		var me = this;
 		var args = this._get_args(item);
 		if (!(args.items && args.items.length)) {
@@ -1444,9 +1444,9 @@
 				}
 			}
 		});
-	},
+	}
 
-	_get_args: function(item) {
+	_get_args(item) {
 		var me = this;
 		return {
 			"items": this._get_item_list(item),
@@ -1474,9 +1474,9 @@
 			"pos_profile": me.frm.doc.doctype == 'Sales Invoice' ? me.frm.doc.pos_profile : '',
 			"coupon_code": me.frm.doc.coupon_code
 		};
-	},
+	}
 
-	_get_item_list: function(item) {
+	_get_item_list(item) {
 		var item_list = [];
 		var append_item = function(d) {
 			if (d.item_code) {
@@ -1517,9 +1517,9 @@
 			});
 		}
 		return item_list;
-	},
+	}
 
-	_set_values_for_item_list: function(children) {
+	_set_values_for_item_list(children) {
 		var me = this;
 		var price_list_rate_changed = false;
 		var items_rule_dict = {};
@@ -1556,9 +1556,9 @@
 		me.apply_rule_on_other_items(items_rule_dict);
 
 		if(!price_list_rate_changed) me.calculate_taxes_and_totals();
-	},
+	}
 
-	apply_rule_on_other_items: function(args) {
+	apply_rule_on_other_items(args) {
 		const me = this;
 		const fields = ["discount_percentage", "pricing_rules", "discount_amount", "rate"];
 
@@ -1577,9 +1577,9 @@
 				});
 			}
 		}
-	},
+	}
 
-	apply_product_discount: function(free_item_data) {
+	apply_product_discount(free_item_data) {
 		const items = this.frm.doc.items.filter(d => (d.item_code == free_item_data.item_code
 			&& d.is_free_item)) || [];
 
@@ -1593,9 +1593,9 @@
 		} if (items && items.length && free_item_data) {
 			items[0].qty = free_item_data.qty
 		}
-	},
+	}
 
-	apply_price_list: function(item, reset_plc_conversion) {
+	apply_price_list(item, reset_plc_conversion) {
 		// We need to reset plc_conversion_rate sometimes because the call to
 		// `erpnext.stock.get_item_details.apply_price_list` is sensitive to its value
 		if (!reset_plc_conversion) {
@@ -1634,9 +1634,9 @@
 		}).always(() => {
 			me.in_apply_price_list = false;
 		});
-	},
+	}
 
-	remove_pricing_rule: function(item) {
+	remove_pricing_rule(item) {
 		let me = this;
 		const fields = ["discount_percentage",
 			"discount_amount", "margin_rate_or_amount", "rate_with_margin"];
@@ -1670,18 +1670,18 @@
 
 			me.trigger_price_list_rate();
 		}
-	},
+	}
 
-	trigger_price_list_rate: function() {
+	trigger_price_list_rate() {
 		var me  = this;
 
 		this.frm.doc.items.forEach(child_row => {
 			me.frm.script_manager.trigger("price_list_rate",
 				child_row.doctype, child_row.name);
 		})
-	},
+	}
 
-	validate_company_and_party: function() {
+	validate_company_and_party() {
 		var me = this;
 		var valid = true;
 
@@ -1696,9 +1696,9 @@
 			}
 		});
 		return valid;
-	},
+	}
 
-	get_terms: function() {
+	get_terms() {
 		var me = this;
 
 		erpnext.utils.get_terms(this.frm.doc.tc_name, this.frm.doc, function(r) {
@@ -1706,9 +1706,9 @@
 				me.frm.set_value("terms", r.message);
 			}
 		});
-	},
+	}
 
-	taxes_and_charges: function() {
+	taxes_and_charges() {
 		var me = this;
 		if(this.frm.doc.taxes_and_charges) {
 			return this.frm.call({
@@ -1734,9 +1734,9 @@
 				}
 			});
 		}
-	},
+	}
 
-	tax_category: function() {
+	tax_category() {
 		var me = this;
 		if(me.frm.updating_party_details) return;
 
@@ -1744,9 +1744,9 @@
 			() => this.update_item_tax_map(),
 			() => erpnext.utils.set_taxes(this.frm, "tax_category"),
 		]);
-	},
+	}
 
-	item_tax_template: function(doc, cdt, cdn) {
+	item_tax_template(doc, cdt, cdn) {
 		var me = this;
 		if(me.frm.updating_party_details) return;
 
@@ -1772,9 +1772,9 @@
 			item.item_tax_rate = "{}";
 			me.calculate_taxes_and_totals();
 		}
-	},
+	}
 
-	update_item_tax_map: function() {
+	update_item_tax_map() {
 		var me = this;
 		var item_codes = [];
 		$.each(this.frm.doc.items || [], function(i, item) {
@@ -1810,9 +1810,9 @@
 				}
 			});
 		}
-	},
+	}
 
-	is_recurring: function() {
+	is_recurring() {
 		// set default values for recurring documents
 		if(this.frm.doc.is_recurring && this.frm.doc.__islocal) {
 			frappe.msgprint(__("Please set recurring after saving"));
@@ -1835,9 +1835,9 @@
 		}
 
 		refresh_many(["notification_email_address", "repeat_on_day_of_month"]);
-	},
+	}
 
-	from_date: function() {
+	from_date() {
 		// set to_date
 		if(this.frm.doc.from_date) {
 			var recurring_type_map = {'Monthly': 1, 'Quarterly': 3, 'Half-yearly': 6,
@@ -1851,25 +1851,25 @@
 				refresh_field('to_date');
 			}
 		}
-	},
+	}
 
-	set_gross_profit: function(item) {
+	set_gross_profit(item) {
 		if (["Sales Order", "Quotation"].includes(this.frm.doc.doctype) && item.valuation_rate) {
 			var rate = flt(item.rate) * flt(this.frm.doc.conversion_rate || 1);
 			item.gross_profit = flt(((rate - item.valuation_rate) * item.stock_qty), precision("amount", item));
 		}
-	},
+	}
 
-	setup_item_selector: function() {
+	setup_item_selector() {
 		// TODO: remove item selector
 
 		return;
 		// if(!this.item_selector) {
 		// 	this.item_selector = new erpnext.ItemSelector({frm: this.frm});
 		// }
-	},
+	}
 
-	get_advances: function() {
+	get_advances() {
 		if(!this.frm.is_return) {
 			return this.frm.call({
 				method: "set_advances",
@@ -1879,9 +1879,9 @@
 				}
 			})
 		}
-	},
+	}
 
-	make_payment_entry: function() {
+	make_payment_entry() {
 		return frappe.call({
 			method: cur_frm.cscript.get_method_for_payment(),
 			args: {
@@ -1894,9 +1894,9 @@
 				// cur_frm.refresh_fields()
 			}
 		});
-	},
+	}
 
-	get_method_for_payment: function(){
+	get_method_for_payment(){
 		var method = "erpnext.accounts.doctype.payment_entry.payment_entry.get_payment_entry";
 		if(cur_frm.doc.__onload && cur_frm.doc.__onload.make_payment_via_journal_entry){
 			if(in_list(['Sales Invoice', 'Purchase Invoice'],  cur_frm.doc.doctype)){
@@ -1907,9 +1907,9 @@
 		}
 
 		return method
-	},
+	}
 
-	set_query_for_batch: function(doc, cdt, cdn) {
+	set_query_for_batch(doc, cdt, cdn) {
 		// Show item's batches in the dropdown of batch no
 
 		var me = this;
@@ -1939,9 +1939,9 @@
 				filters: filters
 			}
 		}
-	},
+	}
 
-	set_query_for_item_tax_template: function(doc, cdt, cdn) {
+	set_query_for_item_tax_template(doc, cdt, cdn) {
 		var item = frappe.get_doc(cdt, cdn);
 		if(!item.item_code) {
 			return doc.company ? {filters: {company: doc.company}} : {};
@@ -1961,9 +1961,9 @@
 				filters: filters
 			}
 		}
-	},
+	}
 
-	payment_terms_template: function() {
+	payment_terms_template() {
 		var me = this;
 		const doc = this.frm.doc;
 		if(doc.payment_terms_template && doc.doctype !== 'Delivery Note') {
@@ -1983,9 +1983,9 @@
 				}
 			})
 		}
-	},
+	}
 
-	payment_term: function(doc, cdt, cdn) {
+	payment_term(doc, cdt, cdn) {
 		var row = locals[cdt][cdn];
 		if(row.payment_term) {
 			frappe.call({
@@ -2005,17 +2005,17 @@
 				}
 			})
 		}
-	},
+	}
 
-	against_blanket_order: function(doc, cdt, cdn) {
+	against_blanket_order(doc, cdt, cdn) {
 		var item = locals[cdt][cdn];
 		if(!item.against_blanket_order) {
 			frappe.model.set_value(this.frm.doctype + " Item", item.name, "blanket_order", null);
 			frappe.model.set_value(this.frm.doctype + " Item", item.name, "blanket_order_rate", 0.00);
 		}
-	},
+	}
 
-	blanket_order: function(doc, cdt, cdn) {
+	blanket_order(doc, cdt, cdn) {
 		var me = this;
 		var item = locals[cdt][cdn];
 		if (item.blanket_order && (item.parenttype=="Sales Order" || item.parenttype=="Purchase Order")) {
@@ -2043,34 +2043,34 @@
 				}
 			})
 		}
-	},
+	}
 
-	set_reserve_warehouse: function() {
+	set_reserve_warehouse() {
 		this.autofill_warehouse(this.frm.doc.supplied_items, "reserve_warehouse", this.frm.doc.set_reserve_warehouse);
-	},
+	}
 
-	set_warehouse: function() {
+	set_warehouse() {
 		this.autofill_warehouse(this.frm.doc.items, "warehouse", this.frm.doc.set_warehouse);
-	},
+	}
 
-	set_target_warehouse: function() {
+	set_target_warehouse() {
 		this.autofill_warehouse(this.frm.doc.items, "target_warehouse", this.frm.doc.set_target_warehouse);
-	},
+	}
 
-	set_from_warehouse: function() {
+	set_from_warehouse() {
 		this.autofill_warehouse(this.frm.doc.items, "from_warehouse", this.frm.doc.set_from_warehouse);
-	},
+	}
 
-	autofill_warehouse : function (child_table, warehouse_field, warehouse) {
+	autofill_warehouse(child_table, warehouse_field, warehouse) {
 		if (warehouse && child_table && child_table.length) {
 			let doctype = child_table[0].doctype;
 			$.each(child_table || [], function(i, item) {
 				frappe.model.set_value(doctype, item.name, warehouse_field, warehouse);
 			});
 		}
-	},
+	}
 
-	coupon_code: function() {
+	coupon_code() {
 		var me = this;
 		frappe.run_serially([
 			() => this.frm.doc.ignore_pricing_rule=1,
@@ -2079,7 +2079,7 @@
 			() => me.apply_pricing_rule()
 		]);
 	}
-});
+};
 
 erpnext.show_serial_batch_selector = function (frm, d, callback, on_close, show_dialog) {
 	let warehouse, receiving_stock, existing_stock;
diff --git a/erpnext/public/js/payment/payments.js b/erpnext/public/js/payment/payments.js
index 0d656bc..7df976c 100644
--- a/erpnext/public/js/payment/payments.js
+++ b/erpnext/public/js/payment/payments.js
@@ -1,31 +1,31 @@
 // Copyright (c) 2015, Frappe Technologies Pvt. Ltd. and Contributors
 // License: GNU General Public License v3. See license.txt
 
-erpnext.payments = erpnext.stock.StockController.extend({
-	make_payment: function() {
+erpnext.payments = class payments extends erpnext.stock.StockController {
+	make_payment() {
 		var me = this;
 
 		this.dialog = new frappe.ui.Dialog({
 			title: 'Payment'
 		});
-	
+
 		this.dialog.show();
 		this.$body = this.dialog.body;
 		this.set_payment_primary_action();
 		this.make_keyboard();
 		this.select_text()
-	},
+	}
 
-	select_text: function(){
+	select_text(){
 		var me = this;
 		$(this.$body).find('.form-control').click(function(){
 			$(this).select();
 		})
-	},
+	}
 
-	set_payment_primary_action: function(){
+	set_payment_primary_action(){
 		var me = this;
-	
+
 		this.dialog.set_primary_action(__("Submit"), function() {
 			// Allow no ZERO payment
 			$.each(me.frm.doc.payments, function (index, data) {
@@ -36,18 +36,18 @@
 				}
 			});
 		})
-	},
+	}
 
-	make_keyboard: function(){
+	make_keyboard(){
 		var me = this;
 		$(this.$body).empty();
 		$(this.$body).html(frappe.render_template('pos_payment', this.frm.doc))
 		this.show_payment_details();
 		this.bind_keyboard_event()
 		this.clear_amount()
-	},
+	}
 
-	make_multimode_payment: function(){
+	make_multimode_payment(){
 		var me = this;
 
 		if(this.frm.doc.change_amount > 0){
@@ -57,9 +57,9 @@
 		this.payments = frappe.model.add_child(this.frm.doc, 'Multi Mode Payment', "payments");
 		this.payments.mode_of_payment = this.dialog.fields_dict.mode_of_payment.get_value();
 		this.payments.amount = flt(this.payment_val);
-	},
+	}
 
-	show_payment_details: function(){
+	show_payment_details(){
 		var me = this;
 		var multimode_payments = $(this.$body).find('.multimode-payments').empty();
 		if(this.frm.doc.payments.length){
@@ -82,9 +82,9 @@
 		}else{
 			$("<p>No payment mode selected in pos profile</p>").appendTo(multimode_payments)
 		}
-	},
+	}
 
-	set_outstanding_amount: function(){
+	set_outstanding_amount(){
 		this.selected_mode = $(this.$body).find(repl("input[idx='%(idx)s']",{'idx': this.idx}));
 		this.highlight_selected_row()
 		this.payment_val = 0.0
@@ -99,47 +99,47 @@
 		}
 		this.selected_mode.select()
 		this.bind_amount_change_event();
-	},
-	
-	bind_keyboard_event: function(){
+	}
+
+	bind_keyboard_event(){
 		var me = this;
 		this.payment_val = '';
 		this.bind_form_control_event();
 		this.bind_numeric_keys_event();
-	},
+	}
 
-	bind_form_control_event: function(){
+	bind_form_control_event(){
 		var me = this;
 		$(this.$body).find('.pos-payment-row').click(function(){
 			me.idx = $(this).attr("idx");
 			me.set_outstanding_amount()
 		})
-		
+
 		$(this.$body).find('.form-control').click(function(){
 			me.idx = $(this).attr("idx");
 			me.set_outstanding_amount();
 			me.update_paid_amount(true);
 		})
-		
+
 		$(this.$body).find('.write_off_amount').change(function(){
 			me.write_off_amount(flt($(this).val()), precision("write_off_amount"));
 		})
-		
+
 		$(this.$body).find('.change_amount').change(function(){
 			me.change_amount(flt($(this).val()), precision("change_amount"));
 		})
-	},
+	}
 
-	highlight_selected_row: function(){
+	highlight_selected_row(){
 		var me = this;
 		var selected_row = $(this.$body).find(repl(".pos-payment-row[idx='%(idx)s']",{'idx': this.idx}));
 		$(this.$body).find('.pos-payment-row').removeClass('selected-payment-mode')
 		selected_row.addClass('selected-payment-mode')
 		$(this.$body).find('.amount').attr('disabled', true);
 		this.selected_mode.attr('disabled', false);
-	},
-	
-	bind_numeric_keys_event: function(){
+	}
+
+	bind_numeric_keys_event(){
 		var me = this;
 		$(this.$body).find('.pos-keyboard-key').click(function(){
 			me.payment_val += $(this).text();
@@ -147,7 +147,7 @@
 			me.idx = me.selected_mode.attr("idx")
 			me.update_paid_amount()
 		})
-		
+
 		$(this.$body).find('.delete-btn').click(function(){
 			me.payment_val =  cstr(flt(me.selected_mode.val())).slice(0, -1);
 			me.selected_mode.val(format_currency(me.payment_val, me.frm.doc.currency));
@@ -155,9 +155,9 @@
 			me.update_paid_amount();
 		})
 
-	},
-	
-	bind_amount_change_event: function(){
+	}
+
+	bind_amount_change_event(){
 		var me = this;
 		this.selected_mode.change(function(){
 			me.payment_val =  flt($(this).val()) || 0.0;
@@ -165,9 +165,9 @@
 			me.idx = me.selected_mode.attr("idx")
 			me.update_payment_amount()
 		})
-	},
+	}
 
-	clear_amount: function() {
+	clear_amount() {
 		var me = this;
 		$(this.$body).find('.clr').click(function(e){
 			e.stopPropagation();
@@ -178,9 +178,9 @@
 			me.highlight_selected_row();
 			me.update_payment_amount();
 		})
-	},
+	}
 
-	write_off_amount: function(write_off_amount) {
+	write_off_amount(write_off_amount) {
 		var me = this;
 
 		this.frm.doc.write_off_amount = flt(write_off_amount, precision("write_off_amount"));
@@ -188,17 +188,17 @@
 			precision("base_write_off_amount"));
 		this.calculate_outstanding_amount(false)
 		this.show_amounts()
-	},
+	}
 
-	change_amount: function(change_amount) {
+	change_amount(change_amount) {
 		var me = this;
 
 		this.frm.doc.change_amount = flt(change_amount, precision("change_amount"));
 		this.calculate_write_off_amount()
 		this.show_amounts()
-	},
+	}
 
-	update_paid_amount: function(update_write_off) {
+	update_paid_amount(update_write_off) {
 		var me = this;
 		if(in_list(['change_amount', 'write_off_amount'], this.idx)){
 			var value = me.selected_mode.val();
@@ -213,9 +213,9 @@
 		}else{
 			this.update_payment_amount()
 		}
-	},
+	}
 
-	update_payment_amount: function(){
+	update_payment_amount(){
 		var me = this;
 
 		$.each(this.frm.doc.payments, function(index, data){
@@ -226,9 +226,9 @@
 
 		this.calculate_outstanding_amount(false);
 		this.show_amounts();
-	},
+	}
 
-	show_amounts: function(){
+	show_amounts(){
 		var me = this;
 		$(this.$body).find(".write_off_amount").val(format_currency(this.frm.doc.write_off_amount, this.frm.doc.currency));
 		$(this.$body).find('.paid_amount').text(format_currency(this.frm.doc.paid_amount, this.frm.doc.currency));
@@ -236,4 +236,4 @@
 		$(this.$body).find('.outstanding_amount').text(format_currency(this.frm.doc.outstanding_amount, frappe.get_doc(":Company", this.frm.doc.company).default_currency))
 		this.update_invoice();
 	}
-})
\ No newline at end of file
+}
diff --git a/erpnext/public/js/stock_analytics.js b/erpnext/public/js/stock_analytics.js
index 140c9dc..c74b45e 100644
--- a/erpnext/public/js/stock_analytics.js
+++ b/erpnext/public/js/stock_analytics.js
@@ -2,8 +2,8 @@
 // License: GNU General Public License v3. See license.txt
 
 
-erpnext.StockAnalytics = erpnext.StockGridReport.extend({
-	init: function(wrapper, opts) {
+erpnext.StockAnalytics = class StockAnalytics extends erpnext.StockGridReport {
+	constructor(wrapper, opts) {
 		var args = {
 			title: __("Stock Analytics"),
 			parent: $(wrapper).find('.layout-main'),
@@ -30,9 +30,9 @@
 
 		if(opts) $.extend(args, opts);
 
-		this._super(args);
-	},
-	setup_columns: function() {
+		super(args);
+	}
+	setup_columns() {
 		var std_columns = [
 			{id: "name", name: __("Item"), field: "name", width: 300},
 			{id: "brand", name: __("Brand"), field: "brand", width: 100},
@@ -43,8 +43,9 @@
 
 		this.make_date_range_columns();
 		this.columns = std_columns.concat(this.columns);
-	},
-	filters: [
+	}
+
+	filters = [
 		{fieldtype:"Select", label: __("Value or Qty"), fieldname: "value_or_qty",
 			options:[{label:__("Value"), value:"Value"}, {label:__("Quantity"), value:"Quantity"}],
 			filter: function(val, item, opts, me) {
@@ -66,20 +67,21 @@
 				{label:__("Quarterly"), value:"Quarterly"},
 				{label:__("Yearly"), value:"Yearly"},
 			]}
-	],
-	setup_filters: function() {
+	]
+
+	setup_filters() {
 		var me = this;
-		this._super();
+		super.setup_filters();
 
 		this.trigger_refresh_on_change(["value_or_qty", "brand", "warehouse", "range"]);
 
 		this.show_zero_check();
-	},
-	init_filter_values: function() {
-		this._super();
+	}
+	init_filter_values() {
+		super.init_filter_values();
 		this.filter_inputs.range && this.filter_inputs.range.val('Monthly');
-	},
-	prepare_data: function() {
+	}
+	prepare_data() {
 		var me = this;
 
 		if(!this.data) {
@@ -112,8 +114,8 @@
 		this.prepare_balances();
 		this.update_groups();
 
-	},
-	prepare_balances: function() {
+	}
+	prepare_balances() {
 		var me = this;
 		var from_date = frappe.datetime.str_to_obj(this.from_date);
 		var to_date = frappe.datetime.str_to_obj(this.to_date);
@@ -164,8 +166,8 @@
 				item.closing_qty_value += diff;
 			}
 		}
-	},
-	update_groups: function() {
+	}
+	update_groups() {
 		var me = this;
 		$.each(this.data, function(i, item) {
 			// update groups
@@ -192,8 +194,8 @@
 				}
 			}
 		});
-	},
-	show_stock_ledger: function(item_code) {
+	}
+	show_stock_ledger(item_code) {
 		frappe.route_options = {
 			item_code: item_code,
 			from_date: this.from_date,
@@ -201,5 +203,5 @@
 		};
 		frappe.set_route("query-report", "Stock Ledger");
 	}
-});
+};
 
diff --git a/erpnext/public/js/stock_grid_report.js b/erpnext/public/js/stock_grid_report.js
index 832fd3e..752fafd 100644
--- a/erpnext/public/js/stock_grid_report.js
+++ b/erpnext/public/js/stock_grid_report.js
@@ -1,16 +1,16 @@
 // Copyright (c) 2015, Frappe Technologies Pvt. Ltd. and Contributors
 // License: GNU General Public License v3. See license.txt
 
-erpnext.StockGridReport = frappe.views.TreeGridReport.extend({
-	get_item_warehouse: function(warehouse, item) {
+erpnext.StockGridReport = class StockGridReport extends frappe.views.TreeGridReport {
+	get_item_warehouse(warehouse, item) {
 		if(!this.item_warehouse[item]) this.item_warehouse[item] = {};
 		if(!this.item_warehouse[item][warehouse]) this.item_warehouse[item][warehouse] = {
 			balance_qty: 0.0, balance_value: 0.0, fifo_stack: []
 		};
 		return this.item_warehouse[item][warehouse];
-	},
+	}
 
-	get_value_diff: function(wh, sl, is_fifo) {
+	get_value_diff(wh, sl, is_fifo) {
 		// value
 		if(sl.qty > 0) {
 			// incoming - rate is given
@@ -59,8 +59,8 @@
 		wh.balance_qty += sl.qty;
 		wh.balance_value += value_diff;
 		return value_diff;
-	},
-	get_fifo_value_diff: function(wh, sl) {
+	}
+	get_fifo_value_diff(wh, sl) {
 		// get exact rate from fifo stack
 		var fifo_stack = (wh.fifo_stack || []).reverse();
 		var fifo_value_diff = 0.0;
@@ -89,9 +89,9 @@
 		// reset the updated stack
 		wh.fifo_stack = fifo_stack.reverse();
 		return -fifo_value_diff;
-	},
+	}
 
-	get_serialized_value_diff: function(sl) {
+	get_serialized_value_diff(sl) {
 		var me = this;
 
 		var value_diff = 0.0;
@@ -103,9 +103,9 @@
 		});
 
 		return value_diff;
-	},
+	}
 
-	get_serialized_buying_rates: function() {
+	get_serialized_buying_rates() {
 		var serialized_buying_rates = {};
 
 		if (frappe.report_dump.data["Serial No"]) {
@@ -115,5 +115,5 @@
 		}
 
 		return serialized_buying_rates;
-	},
-});
+	}
+};
diff --git a/erpnext/public/js/telephony.js b/erpnext/public/js/telephony.js
index 9548d6c..1c3e314 100644
--- a/erpnext/public/js/telephony.js
+++ b/erpnext/public/js/telephony.js
@@ -1,19 +1,19 @@
-frappe.ui.form.ControlData = frappe.ui.form.ControlData.extend( {
+frappe.ui.form.ControlData = class ControlData extends frappe.ui.form.ControlData  {
 	make_input() {
-		this._super();
+		super.make_input();
 		if (this.df.options == 'Phone') {
 			this.setup_phone();
 		}
 		if (this.frm && this.frm.fields_dict) {
 			Object.values(this.frm.fields_dict).forEach(function(field) {
-				if (field.df.read_only === 1 && field.df.options === 'Phone' 
+				if (field.df.read_only === 1 && field.df.options === 'Phone'
 					&& field.disp_area.style[0] != 'display' && !field.has_icon) {
 					field.setup_phone();
 					field.has_icon = true;
 				}
 			});
 		}
-	},
+	}
 	setup_phone() {
 		if (frappe.phone_call.handler) {
 			let control = this.df.read_only ? '.control-value' : '.control-input';
@@ -30,4 +30,4 @@
 				});
 		}
 	}
-});
+};
diff --git a/erpnext/public/js/utils/customer_quick_entry.js b/erpnext/public/js/utils/customer_quick_entry.js
index ebe6cd9..efb8dd9 100644
--- a/erpnext/public/js/utils/customer_quick_entry.js
+++ b/erpnext/public/js/utils/customer_quick_entry.js
@@ -1,17 +1,17 @@
 frappe.provide('frappe.ui.form');
 
-frappe.ui.form.CustomerQuickEntryForm = frappe.ui.form.QuickEntryForm.extend({
-	init: function(doctype, after_insert) {
+frappe.ui.form.CustomerQuickEntryForm = class CustomerQuickEntryForm extends frappe.ui.form.QuickEntryForm {
+	constructor(doctype, after_insert) {
+		super(doctype, after_insert);
 		this.skip_redirect_on_error = true;
-		this._super(doctype, after_insert);
-	},
+	}
 
-	render_dialog: function() {
+	render_dialog() {
 		this.mandatory = this.mandatory.concat(this.get_variant_fields());
-		this._super();
-	},
+		super.render_dialog();
+	}
 
-	get_variant_fields: function() {
+	get_variant_fields() {
 		var variant_fields = [{
 			fieldtype: "Section Break",
 			label: __("Primary Contact Details"),
@@ -77,5 +77,5 @@
 		}];
 
 		return variant_fields;
-	},
-})
\ No newline at end of file
+	}
+}
diff --git a/erpnext/public/js/utils/item_quick_entry.js b/erpnext/public/js/utils/item_quick_entry.js
index 27ef107..7e0198d 100644
--- a/erpnext/public/js/utils/item_quick_entry.js
+++ b/erpnext/public/js/utils/item_quick_entry.js
@@ -1,27 +1,27 @@
 frappe.provide('frappe.ui.form');
 
-frappe.ui.form.ItemQuickEntryForm = frappe.ui.form.QuickEntryForm.extend({
-	init: function(doctype, after_insert) {
-		this._super(doctype, after_insert);
-	},
+frappe.ui.form.ItemQuickEntryForm = class ItemQuickEntryForm extends frappe.ui.form.QuickEntryForm {
+	constructor(doctype, after_insert) {
+		super(doctype, after_insert);
+	}
 
-	render_dialog: function() {
+	render_dialog() {
 		this.mandatory = this.get_variant_fields().concat(this.mandatory);
 		this.mandatory = this.mandatory.concat(this.get_attributes_fields());
 		this.check_naming_series_based_on();
-		this._super();
+		super.render_dialog();
 		this.init_post_render_dialog_operations();
 		this.preset_fields_for_template();
 		this.dialog.$wrapper.find('.edit-full').text(__('Edit in full page for more options like assets, serial nos, batches etc.'))
-	},
+	}
 
-	check_naming_series_based_on: function() {
+	check_naming_series_based_on() {
 		if (frappe.defaults.get_default("item_naming_by") === "Naming Series") {
 			this.mandatory = this.mandatory.filter(d => d.fieldname !== "item_code");
 		}
-	},
+	}
 
-	init_post_render_dialog_operations: function() {
+	init_post_render_dialog_operations() {
 		this.dialog.fields_dict.attribute_html.$wrapper.append(frappe.render_template("item_quick_entry"));
 		this.init_for_create_variant_trigger();
 		this.init_for_item_template_trigger();
@@ -29,9 +29,9 @@
 		this.toggle_manufacturer_fields();
 		this.dialog.get_field("item_template").df.hidden = 1;
 		this.dialog.get_field("item_template").refresh();
-	},
+	}
 
-	register_primary_action: function() {
+	register_primary_action() {
 		var me = this;
 		this.dialog.set_primary_action(__('Save'), function() {
 			if (me.dialog.working) return;
@@ -59,9 +59,9 @@
 				me.insert(variant_values);
 			}
 		});
-	},
+	}
 
-	insert: function(variant_values) {
+	insert(variant_values) {
 		let me = this;
 		return new Promise(resolve => {
 			frappe.call({
@@ -94,9 +94,9 @@
 				freeze: true
 			});
 		});
-	},
+	}
 
-	open_doc: function() {
+	open_doc() {
 		this.dialog.hide();
 		this.update_doc();
 		if (this.dialog.fields_dict.create_variant.$input.prop("checked")) {
@@ -106,9 +106,9 @@
 		} else {
 			frappe.set_route('Form', this.doctype, this.doc.name);
 		}
-	},
+	}
 
-	get_variant_fields: function() {
+	get_variant_fields() {
 		var variant_fields = [{
 			fieldname: "create_variant",
 			fieldtype: "Check",
@@ -130,9 +130,9 @@
 		}];
 
 		return variant_fields;
-	},
+	}
 
-	get_manufacturing_fields: function() {
+	get_manufacturing_fields() {
 		this.manufacturer_fields = [{
 			fieldtype: 'Link',
 			options: 'Manufacturer',
@@ -148,9 +148,9 @@
 			reqd: 0
 		}];
 		return this.manufacturer_fields;
-	},
+	}
 
-	get_attributes_fields: function() {
+	get_attributes_fields() {
 		var attribute_fields = [{
 			fieldname: 'attribute_html',
 			fieldtype: 'HTML'
@@ -158,18 +158,18 @@
 
 		attribute_fields = attribute_fields.concat(this.get_manufacturing_fields());
 		return attribute_fields;
-	},
+	}
 
-	init_for_create_variant_trigger: function() {
+	init_for_create_variant_trigger() {
 		var me = this;
 
 		this.dialog.fields_dict.create_variant.$input.on("click", function() {
 			me.preset_fields_for_template();
 			me.init_post_template_trigger_operations(false, [], true);
 		});
-	},
+	}
 
-	preset_fields_for_template: function() {
+	preset_fields_for_template() {
 		var for_variant = this.dialog.get_value('create_variant');
 
 		// setup template field, seen and mandatory if variant
@@ -195,9 +195,9 @@
 			f.refresh();
 		});
 
-	},
+	}
 
-	init_for_item_template_trigger: function() {
+	init_for_item_template_trigger() {
 		var me = this;
 
 		me.dialog.fields_dict["item_template"].df.onchange = () => {
@@ -228,9 +228,9 @@
 				me.init_post_template_trigger_operations(false, [], true);
 			}
 		}
-	},
+	}
 
-	init_post_template_trigger_operations: function(is_manufacturer, attributes, attributes_flag) {
+	init_post_template_trigger_operations(is_manufacturer, attributes, attributes_flag) {
 		this.attributes = attributes;
 		this.attribute_values = {};
 		this.attributes_count = attributes.length;
@@ -240,23 +240,23 @@
 		this.toggle_manufacturer_fields();
 		this.dialog.fields_dict.attribute_html.$wrapper.find(".attributes").toggleClass("hide-control", attributes_flag);
 		this.dialog.fields_dict.attribute_html.$wrapper.find(".attributes-header").toggleClass("hide-control", attributes_flag);
-	},
+	}
 
-	toggle_manufacturer_fields: function() {
+	toggle_manufacturer_fields() {
 		var me = this;
 		$.each(this.manufacturer_fields, function(i, dialog_field) {
 			me.dialog.get_field(dialog_field.fieldname).df.hidden = !me.is_manufacturer;
 			me.dialog.get_field(dialog_field.fieldname).df.reqd = dialog_field.fieldname == 'manufacturer' ? me.is_manufacturer : false;
 			me.dialog.get_field(dialog_field.fieldname).refresh();
 		});
-	},
+	}
 
-	initiate_render_attributes: function() {
+	initiate_render_attributes() {
 		this.dialog.fields_dict.attribute_html.$wrapper.find(".attributes").empty();
 		this.render_attributes(this.attributes);
-	},
+	}
 
-	render_attributes: function(attributes) {
+	render_attributes(attributes) {
 		var me = this;
 
 		this.dialog.get_field('attribute_html').toggle(true);
@@ -291,9 +291,9 @@
 				});
 			}
 		});
-	},
+	}
 
-	init_make_control: function(fieldtype, row) {
+	init_make_control(fieldtype, row) {
 		this[row.attribute] = frappe.ui.form.make_control({
 			df: {
 				"fieldtype": fieldtype,
@@ -305,9 +305,9 @@
 			only_input: false
 		});
 		this[row.attribute].make_input();
-	},
+	}
 
-	init_awesomplete_for_attribute: function(row) {
+	init_awesomplete_for_attribute(row) {
 		var me = this;
 
 		this[row.attribute].input.awesomplete = new Awesomplete(this[row.attribute].input, {
@@ -343,9 +343,9 @@
 			me.attribute_values[$(e.target).attr("data-fieldname")] = e.target.value;
 			$(e.target).closest(".frappe-control").toggleClass("has-error", e.target.value ? false : true);
 		});
-	},
+	}
 
-	get_variant_doc: function() {
+	get_variant_doc() {
 		var me = this;
 		var variant_doc = {};
 		var attribute = this.validate_mandatory_attributes();
@@ -381,9 +381,9 @@
 			})
 		}
 		return variant_doc;
-	},
+	}
 
-	validate_mandatory_attributes: function() {
+	validate_mandatory_attributes() {
 		var me = this;
 		var attribute = {};
 		var mandatory = [];
@@ -404,4 +404,4 @@
 		}
 		return attribute;
 	}
-});
\ No newline at end of file
+};
diff --git a/erpnext/public/js/utils/item_selector.js b/erpnext/public/js/utils/item_selector.js
index d04c488..9fc2640 100644
--- a/erpnext/public/js/utils/item_selector.js
+++ b/erpnext/public/js/utils/item_selector.js
@@ -1,5 +1,5 @@
-erpnext.ItemSelector = Class.extend({
-	init: function(opts) {
+erpnext.ItemSelector = class ItemSelector {
+	constructor(opts) {
 		$.extend(this, opts);
 
 		if (!this.item_field) {
@@ -12,9 +12,9 @@
 
 		this.grid = this.frm.get_field("items").grid;
 		this.setup();
-	},
+	}
 
-	setup: function() {
+	setup() {
 		var me = this;
 		if(!this.grid.add_items_button) {
 			this.grid.add_items_button = this.grid.add_custom_button(__('Add Items'), function() {
@@ -26,9 +26,9 @@
 				setTimeout(function() { me.dialog.input.focus(); }, 1000);
 			});
 		}
-	},
+	}
 
-	make_dialog: function() {
+	make_dialog() {
 		this.dialog = new frappe.ui.Dialog({
 			title: __('Add Items')
 		});
@@ -53,9 +53,9 @@
 				me.timeout_id = undefined;
 			}, 500);
 		});
-	},
+	}
 
-	add_item: function(item_code) {
+	add_item(item_code) {
 		// add row or update qty
 		var added = false;
 
@@ -82,9 +82,9 @@
 			]);
 		}
 
-	},
+	}
 
-	render_items: function() {
+	render_items() {
 		let args = {
 			query: this.item_query,
 			filters: {}
@@ -107,4 +107,4 @@
 			me.dialog.results.html(frappe.render_template('item_selector', {'data':r.values}));
 		});
 	}
-});
\ No newline at end of file
+};
diff --git a/erpnext/public/js/utils/serial_no_batch_selector.js b/erpnext/public/js/utils/serial_no_batch_selector.js
index d49a813..d44c708 100644
--- a/erpnext/public/js/utils/serial_no_batch_selector.js
+++ b/erpnext/public/js/utils/serial_no_batch_selector.js
@@ -1,6 +1,6 @@
 
-erpnext.SerialNoBatchSelector = Class.extend({
-	init: function(opts, show_dialog) {
+erpnext.SerialNoBatchSelector = class SerialNoBatchSelector {
+	constructor(opts, show_dialog) {
 		$.extend(this, opts);
 		this.show_dialog = show_dialog;
 		// frm, item, warehouse_details, has_batch, oldest
@@ -12,16 +12,16 @@
 		if(d && d.has_serial_no && !(this.show_dialog == false)) this.has_serial_no = 1;
 
 		this.setup();
-	},
+	}
 
-	setup: function() {
+	setup() {
 		this.item_code = this.item.item_code;
 		this.qty = this.item.qty;
 		this.make_dialog();
 		this.on_close_dialog();
-	},
+	}
 
-	make_dialog: function() {
+	make_dialog() {
 		var me = this;
 
 		this.data = this.oldest ? this.oldest : [];
@@ -176,15 +176,15 @@
 		}
 
 		this.dialog.show();
-	},
+	}
 
-	on_close_dialog: function() {
+	on_close_dialog() {
 		this.dialog.get_close_btn().on('click', () => {
 			this.on_close && this.on_close(this.item);
 		});
-	},
+	}
 
-	validate: function() {
+	validate() {
 		let values = this.values;
 		if(!values.warehouse) {
 			frappe.throw(__("Please select a warehouse"));
@@ -210,7 +210,7 @@
 			}
 			return true;
 		}
-	},
+	}
 
 	update_batch_items() {
 		// clones an items if muliple batches are selected.
@@ -233,14 +233,14 @@
 					'selected_qty', this.values.warehouse);
 			});
 		}
-	},
+	}
 
 	update_serial_no_item() {
 		// just updates serial no for the item
 		if(this.has_serial_no && !this.has_batch) {
 			this.map_row_values(this.item, this.values, 'serial_no', 'qty');
 		}
-	},
+	}
 
 	update_batch_serial_no_items() {
 		// if serial no selected is from different batches, adds new rows for each batch.
@@ -281,14 +281,14 @@
 				});
 			})
 		}
-	},
+	}
 
-	batch_exists: function(batch) {
+	batch_exists(batch) {
 		const batches = this.frm.doc.items.map(data => data.batch_no);
 		return (batches && in_list(batches, batch)) ? true : false;
-	},
+	}
 
-	map_row_values: function(row, values, number, qty_field, warehouse) {
+	map_row_values(row, values, number, qty_field, warehouse) {
 		row.qty = values[qty_field];
 		row.transfer_qty = flt(values[qty_field]) * flt(row.conversion_factor);
 		row[number] = values[number];
@@ -301,9 +301,9 @@
 		}
 
 		this.frm.dirty();
-	},
+	}
 
-	update_total_qty: function() {
+	update_total_qty() {
 		let qty_field = this.dialog.fields_dict.qty;
 		let total_qty = 0;
 
@@ -312,9 +312,9 @@
 		});
 
 		qty_field.set_input(total_qty);
-	},
+	}
 
-	get_batch_fields: function() {
+	get_batch_fields() {
 		var me = this;
 
 		return [
@@ -425,9 +425,9 @@
 				},
 			}
 		];
-	},
+	}
 
-	get_serial_no_fields: function() {
+	get_serial_no_fields() {
 		var me = this;
 		this.serial_list = [];
 
@@ -510,4 +510,4 @@
 			}
 		];
 	}
-});
+};