Magento 2 call setTemplate return null data

Question

I am calling below code in my addtocart.phtml to get cart item data

<?php echo $this->getLayout()->createBlock("Magento\Checkout\Block\Cart\Item\Renderer")->setTemplate("Magento_Checkout::cart/item/default_custom.phtml")->toHtml(); ?>

but it returns null array.Please let me know why this code is not working.

Answer 1

Use $block instead of $this. For your case:

<?= $block->getLayout()->createBlock("Magento\Checkout\Block\Cart\Item\Renderer")->setTemplate("Magento_Checkout::cart/item/default_custom.phtml")->toHtml(); ?>

Make sure you pass available data to that block for display