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I am quite unsure of how to know which event will occur when. I cannot understand what arguments I should capture in observer unless I find exactly what I want in internet.

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In Magento 2, some observers will be dispatched in core code like this:

$this->_eventManager->dispatch('catalog_product_collection_load_after', ['collection' => $this]);

As you see, you can get argument by call $observer->getEvent()->getColelction();

Also, some observers will not. In this situation, you have to use some IDE support debug to get what the event dispatch!.

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  • How to do with IDE?
    – P S
    Dec 5, 2017 at 9:32
  • What IDE are you using?
    – Nero Phung
    Dec 5, 2017 at 9:35
  • Sublime Text 3.
    – P S
    Dec 5, 2017 at 9:51
  • It will be better to develop and debug with phpStorm mate.
    – Nero Phung
    Dec 5, 2017 at 9:53
  • Can I get a free version of it?
    – P S
    Dec 5, 2017 at 9:55

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