<el-form-item label="角色:" prop="username">
          <el-select
            v-model="value"
            placeholder="Select"
            popper-class="role_select"
          >
            <el-option disabled>
              <div class="flex">
                <div style="width: 150px">
                  角色
                </div>
                <div>特权</div>
              </div>
            </el-option>
            <el-option
              v-for="item in roleList"
              :key="item.roleid"
              :label="item.roleid"
              :value="item.roleid"
            >
              <div class="flex">
                <div style="width: 150px">
                  {{ item.roleid }}
                </div>
                <el-space
                  wrap
                  style="
                    width: 500px;
                    white-space: normal;
                    word-wrap: break-word;
                  "
                >
                  <el-tag
                    v-for="item1 in item.privs"
                    :key="item1"
                    plain
                    type="primary"
                    size="small"
                  >
                    {{ item1 }}
                  </el-tag>
                </el-space>
              </div>
            </el-option>
          </el-select>
        </el-form-item>```
        
css部分：
不加scoped
<style lang="scss">
.role_select {
  height: unset !important;
  .el-select-dropdown__item {
    height: unset;
    line-height: unset;
    border-bottom: 1px solid #dcdfe6;
    padding: 5px 30px 5px;
  }
}
</style>