后端返回给我categoryId是17 我要从category:[{name:'张三',categoryId:17},{name:'张三',categoryId:18},{name:'张三',categoryId:19},{name:'张三',categoryId:20}]找到id是17的数据 把他的name渲染到 <el-form-item label="商品类目" prop="categoryId"> <el-select @focus="open" v-model="form.categoryId" filterable clearable placeholder="请选择商品类目" > <el-option v-for="item in category" :key="item.categoryId" :label="item.name" :value="item.categoryId" > </el-option> </el-select> </el-form-item>中的select 并且v-model绑定这个id 怎么做

可以使用 JavaScript 的 `find` 方法来查找 `category` 数组中 `categoryId` 等于 17 的元素，然后将其 `name` 属性赋值给 `form.categoryName`，将其 `categoryId` 属性赋值给 `form.categoryId`。具体实现代码如下：

const category = [{name:'张三',categoryId:17},{name:'张三',categoryId:18},{name:'张三',categoryId:19},{name:'张三',categoryId:20}];
const selectedCategory = category.find(item => item.categoryId === 17);

if (selectedCategory) {
  form.categoryName = selectedCategory.name;
  form.categoryId = selectedCategory.categoryId;
}

然后在页面中将 `v-model` 绑定到 `form.categoryId` 上即可：

<el-form-item label="商品类目" prop="categoryId">
  <el-select
    @focus="open"
    v-model="form.categoryId"
    filterable
    clearable
    placeholder="请选择商品类目"
  >
    <el-option
      v-for="item in category"
      :key="item.categoryId"
      :label="item.name"
      :value="item.categoryId"
    >
    </el-option>
  </el-select>
</el-form-item>