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我有 UI 显示来自 3 个不同数组的按钮，这些数据是相关的，订单交换和奇偶校验，按钮具有预先选择的值，如果选择交换 2，我需要选择奇偶校验 2。

<html>
<v-flex md4 sm4 >
        <v-select
            v-model="select7"
            :items="orders"
            flat solo
        ></v-select>
    </v-flex>
    <v-flex md4 sm4 >
        <v-select
            v-model="select2"
            :items="exchanges"
            flat solo
        ></v-select>
    </v-flex>
    <v-flex md4 sm4 >
        <v-select
            v-model="select3"
            :items="parities"
            flat solo
        ></v-select>
  </html>

  <script>
 data () {    
    select7:'o1',        
    orders: ['o1','o2'],
    select2:'ex1',
    select5:'ex1',
    select8:'ex2',
    exchanges: ['ex1','ex2'],
    select3:'par1',
    select6:'par1',
    select9:'par4',
    parities: ['par1,'par2','par3'],
    parities2: ['par4,'par5','par6']
   }
 computed : {
   availableParitiess() {
        if (this.exchanges === 'ex2'){
    return this.parities = parities2 ;
        }
  }
  </script>
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