v-for:

<div id = "app"><ul><li v-for="item in list">{{item}}</li></ul>
</div>
<script>let app = new Vue({el:'#app',data:{list:['B','A','T']}})
</script>

拿到索引index:

<div id="app"><ul><li v-for="(item,index) in list">{{index}}.{{item}}</li></ul>
</div>
<script>let app = new Vue({el:'#app',data:{list:['B','A','T']}});
</script>

v-on:

// 和methods一起用
<div id="app"><button v-on:click="say">说hello</button>
</div>
<script>let app = new Vue({el:'#app',methods:{say(){alert('Hello Vue!');}}});
</script>

传递参数给say

<div id = "app"><input v-model ="name"><button v-on:click="say(name)">输入后打个招呼吧</button>
</div>
<script>let app = new Vue({el:'#app',methods:{say(name){alert('Hello ' + name);}}});
</script>

v-model:

// 上面其实用到了v-model. 将input的输入和v-model中指定的元素绑定.数据变化更新视图..MVVC模式
<div id = 'app'><input type= "text" v-model="msg" ><p>您输入了: {{msg}}</p>
</div>
<script>let app = new Vue({el:'#app',data:{msg:'',}});
</script>

v-once:

// 顾名思义,只渲染一次
<div id="app"><input type="text" v-model="msg"><p v-once>{{msg}}</p>
</div>
<script>let app = new Vue({el:'#app',data:{msg:'你的征途是星辰大海'}});
</script>
// 无论怎么改变input框的内容,下面的初始话都不改变

参考 https://mp.weixin.qq.com/s?__biz=MzA3MDg1NzQyNA==&mid=2649654475&idx=1&sn=3ef46ab357a1b8380be2d8e4b6669c53&chksm=872c4374b05bca627354bd6b36406feb20d0454823b50dded470f9d939f24ee72acba9bf0615&scene=21#wechat_redirect