store.state.count: {{ store.state.count }}
调用computed(halfCount): {{ halfCount }}
store.getters.doubleCount: {{ store.getters.doubleCount }}
store.getters.moreCount(10): {{ store.getters.moreCount(10) }}
store.commit('increment', {num: 7}):
store.commit({type: "increment", num: 5}):
store.commit({type: "increment", num: 5}):
store.dispatch({type: 'inc_actions', num: 5}):