Скачать или смотреть Define a Redux Action

In Redux, an action is a plain JavaScript object that serves as the sole source of information for the Redux store. It describes an event that has occurred in the application and signals an intention to change the state.
Key characteristics of a Redux action:
Must have a type property:
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This property is a string constant that uniquely identifies the type of action being performed (e.g., 'ADD_TODO', 'LOGIN', 'INCREMENT_COUNTER'). This type is used by reducers to determine how to update the state.
Can have a payload property (optional):
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This property carries any necessary data related to the action. For example, an 'ADD_TODO' action might have a payload containing the text of the new todo item.