SOURCE

const store = new Vuex.Store({
  state: {
    count: 0
  },
  mutations: {
    inc: state => state.count++,
    dec: state => state.count--
  }
});

let app = new Vue({
  el: '#app',
  data: {
    info:'',
    input:'123'
  },
 computed: {
    count () {
        return store.state.count
    }
  },
  methods: {
  	Get: function() {
    	this.info = [];
    	axios.get('http://api.twitf.com/api/user')
        .then(function (response) {
            app.info=response.data;
        		app.input='success';
        })
        .catch(function (error) {
          console.log(error);
  			});
    },
  	inc () {
      store.commit('inc')
    },
    dec () {
      store.commit('dec')
    }
  }
});

<div id="app">
  <button @click="Get">Get</button>
  <ul v-for="val in info">
    <li>{{ val.name }}</li>
    <li>{{ val.sex }}</li>
    <li>{{ val.email }}</li>
  </ul>
    <input type="text" v-model='input' />
    <p>{{count}}
    <button @click="inc">+</button>
    <button @click="dec">-</button>
  </p>

</div>