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How can we override Magento\Checkout\Model\Cart class in Magento 2 ?

1

You can override using preference method in di.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <preference for="Magento\Checkout\Model\Cart" type="Vendor\ModuleName\Model\Cart" />
</config>

You have to create Cart class in your module in order to extend Magento\Checkout\Model\Cart. E.g:

<?php
namespace Vendor\ModuleName\Model;


class Cart extends \Magento\Checkout\Model\Cart
{
     //override respective methods
}
0

If you want to modify some methods on this class, first try to use plugins instead of extending whole class.

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