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console 命令行工具 X clear

                    
>
console
new Vue({
  el: "#app",
  data: {
    arr: [{
      name: 'ceshi'
    },
    {
      name: 'test'
    },
    {
      name: 'qwert'
    }],
    comparisonArr: []
  },
  methods: {
    selItem(item) {
      this.comparisonArr.push(item)
    }
  }
})
<script src="https://unpkg.com/vue">
</script>
<div id="app">
  <div>
    <h1>
      展示的数据
    </h1>
    <ul>
      <li v-for='item in arr'>
        {{item.name}}
        <button @click='selItem(item)'>
          添加进去比较
        </button>
      </li>
    </ul>
  </div>
  <div>
    <h1>
      比较的数据
    </h1>
    <ul>
      <li v-for='item in comparisonArr'>
        {{item.name}}
      </li>
    </ul>
  </div>
</div>