diff --git a/erpnext/crm/doctype/lead/lead.js b/erpnext/crm/doctype/lead/lead.js
index 609eab7f9a2..e50cf9e4dd0 100644
--- a/erpnext/crm/doctype/lead/lead.js
+++ b/erpnext/crm/doctype/lead/lead.js
@@ -28,18 +28,18 @@ erpnext.LeadController = class LeadController extends frappe.ui.form.Controller
 		erpnext.toggle_naming_series();
 
 		if (!this.frm.is_new() && doc.__onload && !doc.__onload.is_customer) {
-			this.frm.add_custom_button(__("Customer"), this.make_customer, __("Create"));
-			this.frm.add_custom_button(
-				__("Opportunity"),
-				function () {
-					me.frm.trigger("make_opportunity");
-				},
-				__("Create")
-			);
-			this.frm.add_custom_button(__("Quotation"), this.make_quotation, __("Create"));
+			this.frm.add_custom_button(__("Customer"), this.make_customer.bind(this), __("Create"));
+			this.frm.add_custom_button(__("Opportunity"), this.make_opportunity.bind(this), __("Create"));
+			this.frm.add_custom_button(__("Quotation"), this.make_quotation.bind(this), __("Create"));
 			if (!doc.__onload.linked_prospects.length) {
-				this.frm.add_custom_button(__("Prospect"), this.make_prospect, __("Create"));
-				this.frm.add_custom_button(__("Add to Prospect"), this.add_lead_to_prospect, __("Action"));
+				this.frm.add_custom_button(__("Prospect"), this.make_prospect.bind(this), __("Create"));
+				this.frm.add_custom_button(
+					__("Add to Prospect"),
+					() => {
+						this.add_lead_to_prospect(this.frm);
+					},
+					__("Action")
+				);
 			}
 		}
 
@@ -53,8 +53,7 @@ erpnext.LeadController = class LeadController extends frappe.ui.form.Controller
 		this.show_activities();
 	}
 
-	add_lead_to_prospect() {
-		let me = this;
+	add_lead_to_prospect(frm) {
 		frappe.prompt(
 			[
 				{
@@ -69,12 +68,12 @@ erpnext.LeadController = class LeadController extends frappe.ui.form.Controller
 				frappe.call({
 					method: "erpnext.crm.doctype.lead.lead.add_lead_to_prospect",
 					args: {
-						lead: me.frm.doc.name,
+						lead: frm.doc.name,
 						prospect: data.prospect,
 					},
 					callback: function (r) {
 						if (!r.exc) {
-							me.frm.reload_doc();
+							frm.reload_doc();
 						}
 					},
 					freeze: true,
@@ -89,32 +88,123 @@ erpnext.LeadController = class LeadController extends frappe.ui.form.Controller
 	make_customer() {
 		frappe.model.open_mapped_doc({
 			method: "erpnext.crm.doctype.lead.lead.make_customer",
-			frm: cur_frm,
+			frm: this.frm,
 		});
 	}
 
 	make_quotation() {
 		frappe.model.open_mapped_doc({
 			method: "erpnext.crm.doctype.lead.lead.make_quotation",
-			frm: cur_frm,
+			frm: this.frm,
 		});
 	}
 
+	async make_opportunity() {
+		const frm = this.frm;
+		let existing_prospect = (
+			await frappe.db.get_value(
+				"Prospect Lead",
+				{
+					lead: frm.doc.name,
+				},
+				"name",
+				null,
+				"Prospect"
+			)
+		).message?.name;
+
+		let fields = [];
+		if (!existing_prospect) {
+			fields.push(
+				{
+					label: "Create Prospect",
+					fieldname: "create_prospect",
+					fieldtype: "Check",
+					default: 1,
+				},
+				{
+					label: "Prospect Name",
+					fieldname: "prospect_name",
+					fieldtype: "Data",
+					default: frm.doc.company_name,
+					reqd: 1,
+					depends_on: "create_prospect",
+				}
+			);
+		}
+
+		await frm.reload_doc();
+
+		let existing_contact = (
+			await frappe.db.get_value(
+				"Contact",
+				{
+					first_name: frm.doc.first_name || frm.doc.lead_name,
+					last_name: frm.doc.last_name,
+				},
+				"name"
+			)
+		).message?.name;
+
+		if (!existing_contact) {
+			fields.push({
+				label: "Create Contact",
+				fieldname: "create_contact",
+				fieldtype: "Check",
+				default: "1",
+			});
+		}
+
+		if (fields.length) {
+			const d = new frappe.ui.Dialog({
+				title: __("Create Opportunity"),
+				fields: fields,
+				primary_action: function (data) {
+					frappe.call({
+						method: "create_prospect_and_contact",
+						doc: frm.doc,
+						args: {
+							data: data,
+						},
+						freeze: true,
+						callback: function (r) {
+							if (!r.exc) {
+								frappe.model.open_mapped_doc({
+									method: "erpnext.crm.doctype.lead.lead.make_opportunity",
+									frm: frm,
+								});
+							}
+							d.hide();
+						},
+					});
+				},
+				primary_action_label: __("Create"),
+			});
+			d.show();
+		} else {
+			frappe.model.open_mapped_doc({
+				method: "erpnext.crm.doctype.lead.lead.make_opportunity",
+				frm: frm,
+			});
+		}
+	}
+
 	make_prospect() {
+		const me = this;
 		frappe.model.with_doctype("Prospect", function () {
 			let prospect = frappe.model.get_new_doc("Prospect");
-			prospect.company_name = cur_frm.doc.company_name;
-			prospect.no_of_employees = cur_frm.doc.no_of_employees;
-			prospect.industry = cur_frm.doc.industry;
-			prospect.market_segment = cur_frm.doc.market_segment;
-			prospect.territory = cur_frm.doc.territory;
-			prospect.fax = cur_frm.doc.fax;
-			prospect.website = cur_frm.doc.website;
-			prospect.prospect_owner = cur_frm.doc.lead_owner;
-			prospect.notes = cur_frm.doc.notes;
+			prospect.company_name = me.frm.doc.company_name;
+			prospect.no_of_employees = me.frm.doc.no_of_employees;
+			prospect.industry = me.frm.doc.industry;
+			prospect.market_segment = me.frm.doc.market_segment;
+			prospect.territory = me.frm.doc.territory;
+			prospect.fax = me.frm.doc.fax;
+			prospect.website = me.frm.doc.website;
+			prospect.prospect_owner = me.frm.doc.lead_owner;
+			prospect.notes = me.frm.doc.notes;
 
 			let leads_row = frappe.model.add_child(prospect, "leads");
-			leads_row.lead = cur_frm.doc.name;
+			leads_row.lead = me.frm.doc.name;
 
 			frappe.set_route("Form", "Prospect", prospect.name);
 		});
@@ -150,90 +240,3 @@ erpnext.LeadController = class LeadController extends frappe.ui.form.Controller
 };
 
 extend_cscript(cur_frm.cscript, new erpnext.LeadController({ frm: cur_frm }));
-
-frappe.ui.form.on("Lead", {
-	make_opportunity: async function (frm) {
-		let existing_prospect = (
-			await frappe.db.get_value(
-				"Prospect Lead",
-				{
-					lead: frm.doc.name,
-				},
-				"name",
-				null,
-				"Prospect"
-			)
-		).message.name;
-
-		if (!existing_prospect) {
-			var fields = [
-				{
-					label: "Create Prospect",
-					fieldname: "create_prospect",
-					fieldtype: "Check",
-					default: 1,
-				},
-				{
-					label: "Prospect Name",
-					fieldname: "prospect_name",
-					fieldtype: "Data",
-					default: frm.doc.company_name,
-					depends_on: "create_prospect",
-				},
-			];
-		}
-		let existing_contact = (
-			await frappe.db.get_value(
-				"Contact",
-				{
-					first_name: frm.doc.first_name || frm.doc.lead_name,
-					last_name: frm.doc.last_name,
-				},
-				"name"
-			)
-		).message.name;
-
-		if (!existing_contact) {
-			fields.push({
-				label: "Create Contact",
-				fieldname: "create_contact",
-				fieldtype: "Check",
-				default: "1",
-			});
-		}
-
-		if (fields) {
-			var d = new frappe.ui.Dialog({
-				title: __("Create Opportunity"),
-				fields: fields,
-				primary_action: function () {
-					var data = d.get_values();
-					frappe.call({
-						method: "create_prospect_and_contact",
-						doc: frm.doc,
-						args: {
-							data: data,
-						},
-						freeze: true,
-						callback: function (r) {
-							if (!r.exc) {
-								frappe.model.open_mapped_doc({
-									method: "erpnext.crm.doctype.lead.lead.make_opportunity",
-									frm: frm,
-								});
-							}
-							d.hide();
-						},
-					});
-				},
-				primary_action_label: __("Create"),
-			});
-			d.show();
-		} else {
-			frappe.model.open_mapped_doc({
-				method: "erpnext.crm.doctype.lead.lead.make_opportunity",
-				frm: frm,
-			});
-		}
-	},
-});