<template>
 <div id="app">
  <div class='vue-demo'>
   <input type="text" class="txt" v-model='newItem' @keyup.enter='addItemFun'>
   <ul>
    <li v-for="its in items">{{its.name}}</li>
   </ul>
  </div>
 </div>
</template>
<script>
import store from './store'
export default {
 name: 'app',
 data() {
  return {
   newItem: '',
   items: store.fetch()
  }
 },
 watch: {
  items: {
   handler: function(val, oldVal) {
    store.save(val);
   },
   deep: true
  }
 },
 methods: {
  addItemFun() {
   var _this = this;
   _this.items.push({ 'name': _this.newItem });
   _this.newItem = '';
  }
 }
}

</script>
<style>
#app {
 font-family: 'Avenir', Helvetica, Arial, sans-serif;
 -webkit-font-smoothing: antialiased;
 -moz-osx-font-smoothing: grayscale;
 text-align: center;
 color: #2c3e50;
 margin-top: 60px;
}

.vue-demo {
 width: 400px;
 margin: 0 30px;
}

.txt {
 width: 200px;
 height: 25px;
 line-height: 24px;
 border-radius: 5px;
}

</style>

const STORAGE_KEY = 'todos-vuejs'

export default {

 fetch: function() {

  return window.JSON.parse(window.localStorage.getItem(STORAGE_KEY) || '[]')

 },

 save: function(items) {

  window.localStorage.setItem(STORAGE_KEY, window.JSON.stringify(items))

 }

}