setInterval with Redux

const {createStore} = require('redux')

// Actions are mapped to state here, called a Reducer
function setIntervalState(state= 0, action) {
    switch(action.type){
        case 'START_TIMER':
            return state = action.payload

        case 'STOP_TIMER':
            if(state !== 0)
                clearInterval(state)
        default:
            break;
    }

}


let store = createStore(setIntervalState)


// Actions
store.dispatch({type:'STOP_TIMER'})
let payload = setInterval(() => {
    console.log("SHOULD NOT pause for 2 seconds")
}, 2000);
store.dispatch({type:'START_TIMER', payload: payload})



store.dispatch({type:'STOP_TIMER'})
payload = setInterval(() => {
    console.log("SHOULD pause for 3 seconds")
}, 3000);
store.dispatch({type:'START_TIMER', payload: payload})