Missing or Incorrect Magento Configuration

Oct 13, 2025 by wbrum.org 54 views

Introduction

When working with Magento 1.7, especially with a mobile theme, adding a product to the basket using an AJAX request can be a bit tricky. The issue of "Uncaught TypeError: Cannot read property 'submit' of undefined" can be frustrating, especially when trying to display a popup after the addition. In this article, we will discuss the possible causes and solutions to this problem.

Possible Causes

Before we dive into the solutions, let's first identify the possible causes of this issue:

Incorrect JavaScript Code: The JavaScript code used to make the AJAX request might be incorrect, leading to the "submit" property being undefined.
Missing or Incorrect Magento Configuration: Magento configuration, such as the "Add to Cart" URL, might be missing or incorrect, causing the AJAX request to fail.
Mobile Theme Issues: The mobile theme might be causing issues with the JavaScript code or the Magento configuration, leading to the "Uncaught TypeError" error.

Solution 1: Check the JavaScript Code

The first step is to check the JavaScript code used to make the AJAX request. Make sure that the code is correct and that the "submit" property is being accessed correctly.

// Incorrect code
var form = document.getElementById('add-to-cart-form');
var submitButton = form.submit;
// Correct code
var form = document.getElementById('add-to-cart-form');
var submitButton = form.querySelector('input[type="submit"]');

In the correct code above, we are using the querySelector method to select the submit button by its type.

Solution 2: Check the Magento Configuration

The next step is to check the Magento configuration. Make sure that the "Add to Cart" URL is correct and that the "Add to Cart" form is being submitted correctly.

Check the "Add to Cart" URL: Go to the Magento admin panel and navigate to System > Configuration > Sales > Checkout > Shopping Cart. Make sure that the "Add to Cart" URL is correct.
Check the "Add to Cart" Form: Go to the product detail page and inspect the "Add to Cart" form. Make sure that the form is being submitted correctly.

Solution 3: Check the Mobile Theme

The mobile theme might be causing issues with the JavaScript code or the Magento configuration. Try switching to a different theme or a default theme to see if the issue persists.

Solution 4: Use the Magento API

Instead of using the "Add to Cart" form, you can use the Magento API to add the product to the basket. This can be done using the following code:

// Make an AJAX request to the Magento API
$.ajax({
    type: 'POST',
    url: '/api/rest/products/add',
    data: {
        product_id: 123,
        quantity: 1
    },
    success: function(data) {
        // Display the popup after the addition
        $('#popup').show();
    }
});

In the code above, we are making a POST request to the Magento API to add the product to the basket. We are passing the product ID and quantity as data.

Solution 5: Use a Third-Party Library

There are several third-party libraries available that can help you add products to the basket using AJAX. Some popular libraries include:

Magento Ajax Cart: This library provides a simple way to add products to the basket using AJAX.
Magento Cart: This library provides a more advanced way to add products to the basket using AJAX.

Conclusion

The "Uncaught TypeError: Cannot read property 'submit' of undefined" error can be frustrating, especially when trying to display a popup after the addition. By following the solutions outlined in this article, you should be able to resolve the issue and add products to the basket using AJAX.

Additional Tips

Use the Magento API: Instead of using the "Add to Cart" form, use the Magento API to add the product to the basket.
Use a Third-Party Library: Consider using a third-party library to add products to the basket using AJAX.
Test Thoroughly: Test your code thoroughly to ensure that it is working correctly.

Example Use Case

Here is an example use case of the code above:

// Make an AJAX request to the Magento API
$.ajax({
    type: 'POST',
    url: '/api/rest/products/add',
    data: {
        product_id: 123,
        quantity: 1
    },
    success: function(data) {
        // Display the popup after the addition
        $('#popup').show();
    }
});

In this example, we are making a POST request to the Magento API to add the product to the basket. We are passing the product ID and quantity as data. After the addition, we are displaying a popup using the show method.

Code Snippets

Here are some code snippets that you can use to resolve the issue:

JavaScript Code: Use the following JavaScript code to make the AJAX request:

$.ajax({
    type: 'POST',
    url: '/api/rest/products/add',
    data: {
        product_id: 123,
        quantity: 1
    },
    success: function(data) {
        // Display the popup after the addition
        $('#popup').show();
    }
});

Magento API Code: Use the following Magento API code to add the product to the basket:

// Make an AJAX request to the Magento API
$api = new Mage_Api_Model_Server_V2_Handler();
$api->addProduct(123, 1);

Third-Party Library Code: Use the following third-party library code to add products to the basket using AJAX:

// Use the Magento Ajax Cart library
var cart = new Magento_Ajax_Cart();
cart.addProduct(123, 1);

Q&A

Q: What is the "Uncaught TypeError: Cannot read property 'submit' of undefined" error?

A: The "Uncaught TypeError: Cannot read property 'submit' of undefined" error is a JavaScript error that occurs when the browser is unable to access the "submit" property of an undefined object. This error is commonly encountered when working with Magento 1.7 and trying to add a product to the basket using an AJAX request.

Q: Why am I getting this error?

A: There are several reasons why you might be getting this error. Some possible causes include:

Incorrect JavaScript Code: The JavaScript code used to make the AJAX request might be incorrect, leading to the "submit" property being undefined.
Missing or Incorrect Magento Configuration: Magento configuration, such as the "Add to Cart" URL, might be missing or incorrect, causing the AJAX request to fail.
Mobile Theme Issues: The mobile theme might be causing issues with the JavaScript code or the Magento configuration, leading to the "Uncaught TypeError" error.

Q: How can I resolve this error?

A: To resolve this error, you can try the following solutions:

Check the JavaScript Code: Make sure that the JavaScript code used to make the AJAX request is correct and that the "submit" property is being accessed correctly.
Check the Magento Configuration: Make sure that the Magento configuration, such as the "Add to Cart" URL, is correct and that the "Add to Cart" form is being submitted correctly.
Use the Magento API: Instead of using the "Add to Cart" form, use the Magento API to add the product to the basket.
Use a Third-Party Library: Consider using a third-party library to add products to the basket using AJAX.

Q: What is the Magento API?

A: The Magento API is a set of APIs that allow developers to interact with the Magento platform programmatically. The Magento API can be used to add products to the basket, update product information, and perform other tasks.

Q: How do I use the Magento API?

A: To use the Magento API, you will need to make a POST request to the Magento API endpoint, passing the required data as parameters. For example, to add a product to the basket, you can use the following code:

// Make an AJAX request to the Magento API
$api = new Mage_Api_Model_Server_V2_Handler();
$api->addProduct(123, 1);

Q: What are some popular third-party libraries for adding products to the basket using AJAX?

A: Some popular third-party libraries for adding products to the basket using AJAX include:

Magento Ajax Cart: This library provides a simple way to add products to the basket using AJAX.
Magento Cart: This library provides a more advanced way to add products to the basket using AJAX.

Q: How do I troubleshoot this error?

A: To troubleshoot this error, you can try the following steps:

Check the JavaScript Console: Check the JavaScript console for any error messages that may indicate the cause of the error.
Check the Magento Logs: Check the Magento logs for any error messages that may indicate the cause of the error.
Use a Debugger: Use a debugger to step through the code and identify the line that is causing the error.

Conclusion

The "Uncaught TypeError: Cannot read property 'submit' of undefined" error can be frustrating, especially when trying to add products to the basket using AJAX. By following the solutions outlined in this article, you should be able to resolve the issue and add products to the basket using AJAX.