What does Action do?

Action in NgRx is simply an object that says: "something happened".

It does not perform the action itself and does not change the state - it only describes the event.

#Example

In this object:

• type - a required field that states what exactly happened
• everything else - any data needed for processing

#When is Action used

1. The component calls:

2. This action goes into the system. It can be "heard" by:

• reducer - if the state needs to be updated
• effect - if something side-effecting needs to happen (for example, an API request)

#Examples of actions

• [User] Load Profile
• [Cart] Add Item
• [Auth] Logout Success

#Conclusion

Action is like a telegram: "this happened, here's the data." NgRx then decides on its own what to do with it.