vue动态循环出的多个select出现过的变为disabled

 <template>
     <div class="artcle">
       <el-form
         label-width="100px"
         :model="testForm">
         <el-form-item
           v-for="(vtem, index) in testForm.version"
           :key="index"
           label="命令版本">
           <el-select
             @change="comChange"
             v-model="vtem.ver">
             <el-option
               v-for="item in versionList"
               :key="item.id"
               :value="item.id"
               :disabled="item.id == vtem.ver || selectedArr.includes(item.id)"
               :label="item.name">
             </el-option>
           </el-select>
           <el-button
             icon="el-icon-circle-plus-outline"
             size="small"
             @click="add(index)"
             circle></el-button>
           <el-button
             icon="el-icon-remove-outline"
             size="small"
             @click="remove(index)"
             :disabled="index === 0"
             circle></el-button>
         </el-form-item>
         <el-form-item
           label="测试输入框">
           <el-input
             v-model="testForm.input"></el-input>
         </el-form-item>
       </el-form>
     </div>
 </template>

 export default {
   name: 'home',
   data () {
     return {
       selectedArr: [], // 作为判断是否重复的数组
       testForm: {
         version: [
           { ver: '' }
         ],
         input: ''
       },
       versionList: [
         { id: 1, name: '1.1' },
         { id: 2, name: '1.2' },
         { id: 3, name: '1.3' }
       ]
     }
   },
   methods: {
     add () {
       let version = this.testForm.version
       if (version.length < this.versionList.length) {
         this.testForm.version.push({
           ver: ''
         })
       } else {
         alert('命令版本就三条')
       }
     },
     remove (index) {
       this.selectedArr.splice(index, 1)
       this.testForm.version.splice(index, 1)
     },
   // 下拉改变时
     comChange (index) {
       this.selectedArr = []
       for (let item of this.testForm.version) {
         if (item.ver) {
           this.selectedArr.push(item.ver)
         }
       }
     }
   }
 }