xx.gif

useList

列表操作hook, 对useSet 的二次封装

Example

<style>

*{
  margin: 0;
  padding: 0;
}

li{
  list-style: none;
}

#app {
  font-family: Avenir, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
  margin-top: 60px;
}

ul{
  margin: auto;
  width: 400px;
}

li{
  display: flex;
  justify-content: space-between;
  padding: 8px 16px;
  border: 1px solid #eee;
  border-radius: 4px;
  background: #fff;
}

li + li{
  margin-top: 10px;
}

button{
  padding: 6px 12px;
  background: #efefef;
  border-radius: 4px;
  border: 0;
  box-shadow: 0;
}

button.full{
  display: block;
  box-sizing: border-box;
  width: 100%;
  
}

.card{
  margin: 20px auto;
  padding: 10px 20px;
  width: 400px;
  border-radius: 6px;
  box-shadow: 0 -4px 16px 4px rgba(100, 100, 100, .1);
}

</style>
<template>
  <div id="app">

    <div class="card">
      {{ [...set.values()] }}
    </div>

    <ul>
      <li v-for="item of list" :key='item.key' > 
        {{ item.label }}
        <Button @click="remove(item)"> del </Button>
      </li>
      <li>
        <Button class="full" @click="add({ label:'xxxx', key: 4 })"> add </Button>
      </li>
    </ul>

    
  </div>
</template>

<script>
import { ref, watch } from 'vue'
import { useSet } from 'vx-hook'


function useList(initVal=[]){

    const [ set, util ] = useSet(initVal)
    const list = ref(initVal)
    watch(() => set.value, () =>{ list.value = [ ...set.value ] } )
    
    return [ list, util, set ]
}



export default {
  name: 'App',
  components:{
    
  },
  setup(){
    const [ list, util, set ] = useList([
      {
        label: 'x',
        key: 1
      },
      {
        label: 'xx',
        key: 2
      },
      {
        label: 'xxx',
        key: 3
      }
    ])

    return {
      list,
      set,
      ...util,
    }
  }
}
</script>

Params

名称	说明	默认值
initVal	初始值	[]

Result

const [ list, { add, remove, reset, setInit, update }, set ] = useList([...])

• list 包装后列表 ref
• util 工具函数
  • add 添加项 any => void
  • remove 移除项 any => void
  • reset 重置 () => void
  • setInit 修改初始值, 影响reset 的值 () => void
  • update 修改初始值并执行重置 array => void
• set 被映射 Set

实现

import { watch } from 'vue'
import useSet from './useSet'

/**
 * 列表
 * @param { Array } initVal 初始数据
 * @summary 对Set类型做的hook封装，利用Set的幂等性
 * @exports 
 * const [ set, utils ] = useList([ 1, 2 ])
 * 
 * 添加
 * set.add(3) ==> [1, 2, 3]
 * set.add(2) ==> [1, 2, 3]
 * 
 * 移除
 * set.remove(1) ==> [2, 3]
 * 
 * 重置
 * set.reset()  ==> [1, 2]
 * 
 */
export default function useList(initVal=[]){

    const [ set, util ] = useSet(initVal)
    const list = ref(initVal)
    watch(() => set.value, () =>{ list.value = [ ...set.value ] } )
    
    return [ list, util, set ]
}

• vx-hook