[vue] 列表排序

<div id="root">
  <h2>人员列表</h2>
  <input type="text" placeholder="请输入名字" v-model="keyWord">
  <button @click="sortType = 2">年龄升序</button>
  <button @click="sortType = 1">年龄降序</button>
  <button @click="sortType = 0">原顺序</button>
  <ul>
    <li v-for="(p,index) of filPerons" :key="p.id">
      {{p.name}}-{{p.age}}-{{p.sex}}
      <input type="text">
    </li>
  </ul>
</div>

new Vue({
  el:'#root',
  data:{
    keyWord:'',
    sortType:0, //0原顺序 1降序 2升序
    persons:[
      {id:'001',name:'马冬梅',age:30,sex:'女'},
      {id:'002',name:'周冬雨',age:31,sex:'女'},
      {id:'003',name:'周杰伦',age:18,sex:'男'},
      {id:'004',name:'温兆伦',age:19,sex:'男'}
    ]
  },
  computed:{
    filPerons(){
      const arr = this.persons.filter((p)=>{
        return p.name.indexOf(this.keyWord) !== -1
      })

      return arr
    }
  }
})

new Vue({
  el:'#root',
  data:{
    keyWord:'',
    sortType:0, //0原顺序 1降序 2升序
    persons:[
      {id:'001',name:'马冬梅',age:30,sex:'女'},
      {id:'002',name:'周冬雨',age:31,sex:'女'},
      {id:'003',name:'周杰伦',age:18,sex:'男'},
      {id:'004',name:'温兆伦',age:19,sex:'男'}
    ]
  },
  computed:{
    filPerons(){
      const arr = this.persons.filter((p)=>{
        return p.name.indexOf(this.keyWord) !== -1
      })
      console.log(arr)
      
      // 判断一下是否需要排序
      // sort改变原数组
      if(this.sortType){
        arr.sort((p1,p2)=>{
          return this.sortType === 1 ? p2.age-p1.age : p1.age-p2.age
        })
      }
      console.log(arr)

      return arr
    }
  }
})

arr.sort((a,b)=>{return a-b}) 升序