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I am fairly new to Magento, and am having trouble figuring out what I need to add to do this. I have looked all over for this, but can not find a solution that shows how to do this for magento 2. I am looking for how to create a module that displays all of the subcategories of the category clicked. If there are no more subcategories, then I want to display the products for that category.

I have tried making blocks in the admin panel, and attaching these blocks to the product category. I would really like to just create a module that does this for me though.

You need to customized the category in the theme folder use the
following file structure and update the following code

/app/design/frontend/<vendor>/theme/Magento_Catalog/templates/category



products.phtml

<?php



// call current category and sub category



$categoryHelper_sub = $this->helper('MagentoCatalogHelperCategory');

$_category  = $block->getCurrentCategory();



$objectManager_sub = $objectManager =

MagentoFrameworkAppObjectManager::getInstance();

$imagehelper = $objectManager->create('MagentoCatalogHelperImage');

$category = $objectManager_sub->get('MagentoCatalogModelCategory');

$categories_sub =

$category->getCollection()->addAttributeToSelect('*')->addAttributeToFilter('is_active',

1)->addIdFilter($_category->getChildren())->setOrder('position', 'ASC');?>



<?php if(!empty($categories_sub->getData())){ ?>

<div class="page-products">

        <div class="products wrapper grid products-grid">

                <div class="col-xs-12 abt_head caps">

                        <h2><?php echo $_category->getName(); ?></h2>

                        <p><?php echo $_category->getDescription(); ?></p>

                        <div class="current-image">

                                        <img src="<?php echo $_category->getImageUrl()?>" >

                        </div>

                </div>

                        <?php foreach($categories_sub as $category_sub): ?>

                                <?php $category_sub->getParentId();

                                $categoryobj =

$objectManager->create('MagentoCatalogModelCategoryFactory');

                                $category =

$objectManager->get('MagentoFrameworkRegistry')->registry('current_category');//get

current category

                        $category_sub->getChildren();?>

                                <div class='submenu'>

                                        <a href="<?php echo

$categoryHelper_sub->getCategoryUrl($category_sub);?>">

                                        <div class='submenu-img'> <img src="<?php echo

$category_sub->getImageUrl()?>" alt="<?php echo

$category_sub->getName()?>"></img>

                                        </div>

                                        <?php //echo $category_sub->getName()?></a>

                                </div>

                        <?php endforeach; ?>

</div>

<?php } ?>

I have create small module for display sub category please check this link.

https://github.com/pratikmage/magento2-subcategory