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I want to know which event is triggered when a category page is loaded from the megamenu? I want to load a custom collection of data based on a particular category.

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  • what do you mean by "a category page is loaded from the megamenu?"
    – Marius
    May 27, 2022 at 15:35
  • @Marius It is when we click on a category link on the mega menu and that category page loads.
    – mechanic
    May 27, 2022 at 15:39
  • try to use catalog_controller_category_init_after but this is triggered for any category view. it does not matter if you click on it from the menu or from somewhere else
    – Marius
    May 27, 2022 at 15:48
  • Are you looking for custom collection for specific category?
    – S.P
    May 28, 2022 at 7:12
  • Thanks @Marius your solution worked.
    – mechanic
    Jun 1, 2022 at 14:43

2 Answers 2

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In module-catalog you will find all the events related to the category, in etc/events.xml file you will find all the events. i guess this is your event.

<event name="magento_catalog_api_data_categoryinterface_load_after">
        <observer name="legacy_category_load_after" instance="Magento\Framework\EntityManager\Observer\AfterEntityLoad" />
</event>
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You can update category's product collection by override Product Block.

Override your list block and apply condition in initializeProductCollection

\Magento\Catalog\Block\Product\ListProduct::initializeProductCollection

Reference : Magento 2 Override ListProduct.php Block File

Also Magento provide event for product collection catalog_product_collection_load_after

check _afterLoad function in https://github.com/pepe1518/magento2/blob/master/vendor/magento/module-catalog/Model/ResourceModel/Product/Collection.php

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