vue-一次性插值v-once

v-once  一次性插值

    <!--
      {{js表达式}}
    -->
    <div id="app">
          <h3>{{}} 双大括号输出文本内容</h3>
          
          <p>{{ message }}</p>
          
          <p>{{ score +1 }}</p>
          
          <h3>2、一次性插值 v-once</h3>
          
          <p v-once>{{ message }}</p>
    </div>
    <script src="./node_modules/vue/dist/vue.js"></script>
    <script>
        var vm = new Vue({
            el:'#app',
            data:   {
                message:'hello vue',
                score:10
            }
        });
    </script>