After Magento upgrade to 1.9.3 your pricing options no longer update

You’re using a pricing options plugin that updates prices dynamically on the product page and cart, yet after the upgrade of Magento it no longer updates prices automatically.

In our case it was the Simple Configurable Products Extension. When trying to change the product option from say 2oz to 16oz (where we expected the price to change), instead we’d get a javascript error in the browser console and the price wouldn’t change at all.

This was due to a change in core javascript functions. Magento appears to have moved certain product option controls out of product.js and into product_options.js, yet product_options.js isn’t included in older themes. To fix this, the following file must be edited:

{web_root}/store/app/design/frontend/{theme_name}/default/layout/catalog.xml

Look for the “Catalog Product View” <label> under which you’ll see this:

<action method="addJs"><script>varien/product.js</script></action>

Duplicate that line and on the new copy, replace product.js with product_options.js

Be sure to clear all caches by either deleting all files in {magento_root}/var/cache or by logging in to the magento admin, then choosing Configuration > Caches and refreshing all of them.

You should now find this problem fixed.

Source

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