How to add FaceBook share option in magento 2 ?

Add this codeto add FaceBook share option in Magento 2

<?php

                $objectManager = \Magento\Framework\App\ObjectManager::getInstance();

                $productCollection = $objectManager->create('Magento\Catalog\Model\ResourceModel\Product\CollectionFactory');

                $collection = $productCollection->create()
                ->addAttributeToSelect('*')
                ->load();

                foreach ($collection as $_product){
                    $proName = $_product->getName();
                    $proUrl = $_product->getProductUrl();
                }  
                // $_product = $collection->getProduct();

                ?>

and below add this facebook share icon –>

<a href="https://www.facebook.com/sharer/sharer.php?u=<?php echo urlencode($proUrl);?>&t=<?php echo urlencode($proName)?>" onclick='javascript:window.open(this.href,"","width=640,height=480,left=0,top=0,location=no,status=yes,scrollbars=yes,resizable=yes");return false' title="Share on facebook">
                        <!-- <img src="<?php // echo $this->getViewFileUrl('Magento_Catalog::images/facebook-share.jpg'); ?>" alt="Facebook" width="12%"> -->
                        <span class="fab fa-facebook"></span>
                    </a>