SOURCE

reducer=(state=[],action)=>{
  if(action.type==='split_string'){
    return action.payload.split('');
  }
  return state;
}

function render(){
  document.querySelector('body').innerHTML=store.getState();
}
var store=Redux.creatStore(reducer);
store.subscribe(render);
action={
  type:'split_string',
  payload:'abcd'
}
store.dispatch(action);