ReactJS – Effective load in React and React Native

const lightSwitch = (
 state = {on: false},
 action,
) => {
 switch (action.type) {
 case TOGGLE:
 return {...state, on: !state.on };
 default: return state;
 }
}

When Redux is used to use application state Incorporating into React & React Native, why does the action creator need a type but no payload?

If the action has no payload attached, what is the purpose of the action creator?

Sometimes you have a reducer that does not return to a new state based on the payload. An example is the action of switching something in the state. The reducer only needs Know the trigger action to switch attributes.
Example:

const lightSwitch = (
 state = {on: false},
 action ,
) => {
 switch (action.type) {
 case TOGGLE:
 return {...state, on: !state.on };
 default: return state;
 }
}