start overriding

posprinter/hooks.py

@@ -26,7 +26,7 @@ app_license = "gpl-3.0"
 
 # include js, css files in header of desk.html
 # app_include_css = "/assets/posprinter/css/posprinter.css"
-# app_include_js = "/assets/posprinter/js/posprinter.js"
+app_include_js = "posprinter.bundle.js"
 
 # include js, css files in header of web template
 # web_include_css = "/assets/posprinter/css/posprinter.css"

posprinter/public/js/pos_override.js

@@ -0,0 +1,13 @@
+frappe.after_ajax(() => {
+	console.log("overriding ====");
+
+	const original = erpnext.PointOfSale.Controller.prototype.constuctor;
+
+	erpnext.PointOfSale.Controller.prototype.constuctor = function () {
+		console.log("Yoooooooooooooooooow");
+
+		original.call(this, ...arguments);
+
+		console.log("byeeeeeeeeeeeeeeeeee");
+	};
+});

posprinter/public/js/posprinter.bundle.js

@@ -0,0 +1 @@
+import "./pos_override.js";