<template v-if="ok">
 <h1>Title</h1>
 <p>Paragraph 1</p>
 <p>Paragraph 2</p>
</template>

<script>
  data:{
    ok:true
  }
</script>

<div v-if="ok">
  Now you see me
</div>
<div v-else>
  Now you don't
</div>

<div>
  <p v-if="sc>=90">优秀</p>
  <p v-else-if="sc>=60">及格</p>
  <p v-else="sc<60">不及格</p>
</div>

<div class="exp">
  <template v-if="loginType === 'username'">
    <label>Username</label>
    <input placeholder="Enter your username">
  </template>

  <template v-else>
    <label>Email</label>
    <input placeholder="Enter your email address">
  </template>
  <input type="button" @click="btn" value="切换"/>
</div>

<script>
  var exp=new Vue({
    el:".exp",
    data:{
      loginType:"username"
    },
    methods:{
      btn:function(){
        if(this.loginType==="username"){
          this.loginType="email"
        }else{
          this.loginType="username"
        }
      }
    }
  })
</script>

<template v-if="loginType === 'username'">
  <label>Username</label>
  <input placeholder="Enter your username" key="username">
</template>

<template v-else>
  <label>Email</label>
  <input placeholder="Enter your email address" key="email">
</template>

<h1 v-show="ok">Hello!</h1>
<script>
  data:{
    ok:false
  }
</script>

<div style="display:none;"></div>

<div class="exp">
  <ul>
    <li v-for="item in items">{{item.text}}</li>
  </ul>
</div>

<script>
  data:{
    items:[
      {text:"eat"},
      {text:"play"},
      {text:"game"}
    ]
  }
</script>

<div class="exp">
  <ul>
    <li>eat</li>
    <li>play</li>
    <li>game</li>
  </ul>
</div>

<div class="exp">
  <ul>
    <li v-for="item,index in items">{{index}}-{{item.text}}</li>
  </ul>
</div>
<script>
  var exp=new Vue({
    el:".exp",
    data:{
      items:[
        {text:'eat'},
        {text:'paly'},
        {text:'game'}
      ]  
    }
  })
</script>

<div class="exp">
  <ul>
    <li v-for="value in obj">{{value}}</li>
  </ul>
</div>
<script>
  var exp=new Vue({
    el:".exp",
    data:{
      obj:{
        firstname:"PureView",
        lastname:"一个安静的美男子",
        age:18
      }
    }
  })
</script>

<li v-for="value,key,index in obj">{{index+1}}. {{key}}: {{value}}</li>

<div class="exp">
  <ul>
    <li v-for="item in items">{{item.text}}</li>
  </ul>
</div>

<script>
  var exp=new Vue({
    el:".exp",
    data:{
      items:[
        {text:"eat"},
        {text:"play"},
        {text:"game"}
      ]
  }
  })
  exp.items.push({text:'watch TV'})
</script>

data:{
  items:[
      {text:"eat"},
      {text:"play"},
      {text:"game"},
      {text:"gaming"},
      {text:"wot"},
      {text:"wows"},
      {text:"wt"}
    ]
  }
}
exp.items.slice(0,5)

// Vue.set
Vue.set(exp.items, indexOfItem, newValue)

// Array.prototype.splice
exp.items.splice(indexOfItem, 1, newValue)

exp.items.splice(newLength)

var exp=new Vue({
  data:{
    a:1
  }
})
vm.b=2 //模板内无响应

Vue.set(object,key,value)

var exp=new Vue({
  el:".exp",
  data:{
    obj:{
      me:"pureview",
      pet1:"dog",
      pet2:"cat",
      hobby:"games"
    } 
  }
})

Vue.set(exp.obj,"todo","eating")

Vue.delete(exp.obj,"pet2")

<div class="exp">
  <ul>
    <li v-for="n in numbers">{{n}}</li>
  </ul>
</div>

<script>
  var exp=new Vue({
    el:".exp",
    data:{
      num:[1,2,3,4,5,6,7,8,9,10]
    },
    computed:{
      numbers:function(){
        return this.num.filter(function(num){
          return num%2===0
        })
      }
    }
  })
</script>

<div class="exp">
  <ul>
    <li v-for="n in even(num)">{{n}}</li>
  </ul>
</div>

<script>
  var exp=new Vue({
    el:".exp",
    data:{
      num:[1,2,3,4,5,6,7,8,9,10]
    },
    methods:{
      even:function(num){
        return num.filter(function(num){
          return num%2===0
        })
      }
    }
  })
</script>

<div>
 <span v-for="n in 10">{{ n }} </span>
</div>

<ul>
 <template v-for="item in items">
  <li>{{ item.msg }}</li>
  <li class="divider"></li>
 </template>
</ul>

<li v-for="todo in todos" v-if="!todo.isComplete">
 {{ todo }}
</li>

<ul v-if="todos.length">
 <li v-for="todo in todos">
  {{ todo }}
 </li>
</ul>
<p v-else>No todos left!</p>

<my-component v-for="(item,index) in items" v-bind:key="index" :lie="item.text"l></my-component>

<script>
  Vue.component('mycom', {
    template: "<p>{{this.lie}}</p>",
    props:["lie"]
  })
  var exp=new Vue({
    el:".exp",
    data:{
      items:[
        {text:'从前有座山'},
        {text:'山上有座庙'},
        {text:'庙里有个老和尚'},
        {text:'正在玩王者荣耀'}
      ]
    }
  })
</script>