Magento – how to change the class type and template of a block in Magento2 with LayoutXML

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How can do you change the class type and template of a block set by LayoutXML?

For instance I would like to change the class used below from Magento\Wishlist\Block\Customer\Wishlist to Holy\Wishlist\Block\Customer\Wishlist and the template to a template from my module.

<block class="Magento\Wishlist\Block\Customer\Wishlist" name="customer.wishlist" template="view.phtml" cacheable="false">

So far I've tried

<referenceBlock name="customer.wishlist">
    <!--<block class="Holy\Wishlist\Block\Customer\Wishlist" template="Holy_Wishlist::view.phtml"/>-->
    <arguments>
        <argument name="class" xsi:type="string">Holy\Wishlist\Block\Customer\Wishlist</argument>
        <argument name="template" xsi:type="string">Holy_Wishlist::view.phtml</argument>
    </arguments>
</referenceBlock>

Best Answer

Quite old question, but might be useful for someone else, so you can use preference in module di.xml like

<preference for="Magento\Catalog\Block\Product\View\Description" type="Vendor\Module\Block\ProductDescription" />

After this template can be change easily in layout xml without removing core block.

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