How To Override Javascript Function In Odoo

How To Articles

Have you ever encountered a scenario where you had to alter a JavaScript function in Odoo to fit your specific needs? If that’s the case, then you’re in for a treat! In this article, I will walk you through the steps of replacing a JavaScript function in Odoo, sharing my own tips and insights based on my personal experience.

Understanding JavaScript Function Overriding

Before we dive into the details, let’s start by understanding what JavaScript function overriding means. Function overriding allows you to replace or extend an existing JavaScript function with your own implementation. This is a powerful technique that enables you to modify the behavior of a function without modifying its original source code.

Identifying the Function to Override

The first step in overriding a JavaScript function in Odoo is to identify the function that you want to modify. This can be done by inspecting the source code of the Odoo module or by using the browser developer tools to inspect the JavaScript code while running the Odoo application.

Once you have identified the function you want to override, take note of its name and the module or file it belongs to. This information will be crucial in the next steps.

Creating a Custom Module

The next step is to create a custom module in Odoo to contain our overridden function. This can be done by creating a new directory under the addons directory and adding a manifest file (“`“`) with the necessary module information.

Within your custom module, create a JavaScript file and define your overridden function with the same name as the original function. Make sure to add the necessary dependencies in the manifest file to ensure that your module is loaded after the original module.

Here is an example of how the manifest file and JavaScript file might look:


'name': 'Custom Module',
'version': '1.0',
'author': 'Your Name',
'category': 'Custom',
'depends': ['original_module'],
'data': [

// custom_module.js

odoo.define('custom_module.custom_module_js', function (require) {
"use strict";

var originalFunction = require('original_module.js');

originalFunction.prototype.originalFunctionName = function() {
// Your code here

Loading the Custom Module

After creating the custom module, we need to make sure that it is loaded by Odoo when the application starts. To do this, add the custom module to the list of installed modules in your Odoo configuration file.

Once the module is installed and the Odoo application is restarted, your overridden function will be loaded and executed instead of the original function.

Testing and Debugging

After overriding the JavaScript function, it’s important to thoroughly test and debug your code to ensure that it behaves as expected. Use the browser developer tools to inspect the function’s behavior and make any necessary adjustments to your code.


Overriding a JavaScript function in Odoo can be a very useful technique for customizing the behavior of the application to suit your specific needs. By following the steps outlined in this article, you should now have a good understanding of how to override JavaScript functions in Odoo and have the necessary knowledge to start implementing your own customizations.