Vue

by Max Sinev

HTML

<div id="app">
  <h2>Todos:</h2>
  <ol>
    <li v-for="todo in todos['a'][index]">
      {{ todo }}
    </li>
  </ol>
  <button @click="toggle" >{{ index }}</button>
</div>

CSS

body {
  background: #20262E;
  padding: 20px;
  font-family: Helvetica;
}

#app {
  background: #fff;
  border-radius: 4px;
  padding: 20px;
  transition: all 0.2s;
}

li {
  margin: 8px 0;
}

h2 {
  font-weight: bold;
  margin-bottom: 15px;
}

del {
  color: rgba(0, 0, 0, 0.3);
}

Vue

new Vue({
  el: "#app",
  data: {
  	index: 0,
    todos: { a: [[1,2,3,4,5], [6,7,8,9]] }
  },
  methods: {
  	toggle: function(todo){
    	if (!this.index) {
      	this.index = 1;
      } else {
      this.index = 0;
      }
    }
  }
})