Vue

HTML

<div id="app">
  <h2>Scores:</h2>
  <ol>
    <li v-for="todo in todos">
      score: <score :total-score="todo.score"></score>
    </li>
  </ol>
</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

Vue.component('score',{
	template: '<span>{{totalScore}}</span>',
	props: {
  	totalScore: {
       type: Number,
       default: 0
    }
  }
});

new Vue({
  el: "#app",
  data: {
    todos: [
      { text: "Learn JavaScript", done: false, score: 15 },
      { text: "Learn Vue", done: false, score: 7 },
      { text: "Play around in JSFiddle", done: true, score: null },
      { text: "Build something awesome", done: true, score: undefined }
    ]
  },
  methods: {
  	toggle: function(todo){
    	todo.done = !todo.done
    }
  }
})