How does Odoo's action manager work?

Question

Hello there,
So as the question states.
I am interested in Odoo's architecture and have been reading the docs. However I cannot fully grasp how the action manager works. How does it listen to the actions and respond?
For example. When a new module is created and the menu item is added. How does the action of clicking on the menuitem work. How does odoo know that the menuitem has been clicked and that it needs to respond with a certain view.
Where in the source code is the action manager coded?
K

Kalkivi Khunt · Accepted Answer

Hi Nomad,
Odoo's backend is a one-page application and everything starts with the JavaScript method.
In Odoo 16, when a user clicks on any menu, the "onClick" method of the "DropdownItem" component is called, which is located in "/web/static/src/core/dropdown/dropdown_item.js". After that, it redirects to Python controllers, and the "/web/action/load" route is the first one that gets called.
If you are wondering why it's called "onClick" method on menu click. it's because "onClick" method is map

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