選擇性地渲染列表，例如根據(jù)某個(gè)特定屬性（category ）來(lái)決定不同展示渲染，使用計(jì)算屬性computed 見(jiàn)http://www.dbjr.com.cn/article/247179.htm
使用template占位，將循環(huán)放在template中，v-if作用于元素，此方法script中不用定義computed方法

核心代碼片段

<div>
  <el-divider content-position="left">奧迪</el-divider>
  <template v-for="(item, index) in links">
    <el-link type="primary" target="_blank" :href="item.url" :key="index" v-if="item.category==0">
      <el-button type="primary">{{item.name}}</el-button>
    </el-link>
  </template>
  <el-divider content-position="left">奔馳</el-divider>
  <template v-for="(item, index) in links">
    <el-link type="primary" target="_blank" :href="item.url" :key="index" v-if="item.category==1">
      <el-button type="primary">{{item.name}}</el-button>
    </el-link>
  </template>
  <el-divider content-position="left">寶馬</el-divider>
  <template v-for="(item, index) in links">
    <el-link type="primary" target="_blank" :href="item.url" :key="index" v-if="item.category==2">
      <el-button type="primary">{{item.name}}</el-button>
    </el-link>
  </template>
</div>

Car.vue

<template>
  <div>
    <el-row>
      <el-col :span="24">
        <el-form :inline="true" class="user-search">
          <el-form-item>
            <el-button size="small" type="primary" icon="el-icon-plus" @click="handleEdit()" plain>添加鏈接</el-button>
          </el-form-item>
        </el-form>
        <div>
          <el-divider content-position="left">奧迪</el-divider>
          <template v-for="(item, index) in links">
            <el-link type="primary" target="_blank" :href="item.url" :key="index" v-if="item.category==0">
              <el-button type="primary">{{item.name}}</el-button>
            </el-link>
          </template>
          <el-divider content-position="left">奔馳</el-divider>
          <template v-for="(item, index) in links">
            <el-link type="primary" target="_blank" :href="item.url" :key="index" v-if="item.category==1">
              <el-button type="primary">{{item.name}}</el-button>
            </el-link>
          </template>
          <el-divider content-position="left">寶馬</el-divider>
          <template v-for="(item, index) in links">
            <el-link type="primary" target="_blank" :href="item.url" :key="index" v-if="item.category==2">
              <el-button type="primary">{{item.name}}</el-button>
            </el-link>
          </template>
        </div>
        <!-- 添加界面 -->
        <el-dialog :title="title" :visible.sync="editFormVisible" width="30%" @click="closeDialog">
          <el-form label-width="120px" :model="editForm" :rules="rules" ref="editForm">
          <el-form-item label="鏈接名稱" prop="name">
            <el-input size="small" v-model="editForm.name" auto-complete="off" placeholder="請(qǐng)輸入鏈接名稱"></el-input>
          </el-form-item>
          <el-form-item label="鏈接地址" prop="url">
            <el-input size="small" v-model="editForm.url" auto-complete="off" placeholder="請(qǐng)輸入鏈接地址"></el-input>
          </el-form-item>
          </el-form>
          <div slot="footer" class="dialog-footer">
          <el-button size="small" @click="closeDialog">取消</el-button>
          <el-button size="small" type="primary" :loading="loading" class="title" @click="submitForm('editForm')">保存</el-button>
          </div>
        </el-dialog>
      </el-col>
    </el-row>
  </div>
</template>
<script>
import { getLink, saveLink } from '../../api/userMG'
export default {
  data() {
    return {
      links: [],
      loading: false, //顯示加載
      editFormVisible: false, //控制添加頁(yè)面顯示與隱藏
      title: '添加鏈接',
      editForm: {
        name: '',
        url: ''
      },
      // rules表單驗(yàn)證
      rules: {
        name: [{ required: true, message: '請(qǐng)輸入鏈接名稱', trigger: 'blur' }],
        url: [{ required: true, message: '請(qǐng)輸入鏈接地址', trigger: 'blur' }]
      },
    }
  },
  created() {
    // 獲取鏈接
   this.getdata()
  },
  // 這下面的方法只有被調(diào)用才會(huì)被執(zhí)行
  methods: {
    // 獲取鏈接
    getdata() {
      this.loading = true
      getLink().then((response) => {
        this.loading = false
        console.log(response.data)
        this.links = response.data
      }).catch(error => {
        console.log(error)
      })
    },
    // 添加頁(yè)面方法
    handleEdit: function() {
      this.editFormVisible = true
      this.title = '添加鏈接',
      this.editForm.name = '',
      this.editForm.url = ''
    },
    // 添加保存頁(yè)面方法
    submitForm(editData) {
      this.$refs[editData].validate(valid => {
        if (valid) {
          saveLink(this.editForm).then(response => {
            this.editFormVisible = false
            this.loading = false
            // if (response.success)
            this.getdata()
            this.$message({
              type: 'success',
              message: '鏈接添加成功'
            })
          }).catch(error => {
            this.editFormVisible = false
            this.loading = false
            // console.log(error.response.data['url'][0])
            // console.log(error.response.status)
            // this.$message.error('鏈接添加失敗，請(qǐng)稍后再試')
            if (error.response.status == 400 ) {
              this.$message.error(error.response.data['url'][0]+'如: http://xxx 或 https://xxx')
            }else {
              this.$message.error('鏈接添加失敗，請(qǐng)稍后再試')
            }
          })
        }
      })
    },
    // 關(guān)閉添加鏈接窗口
    closeDialog() {
      this.editFormVisible = false
    }
  }
}
</script>
<style>
  /* .el-row {
    margin-top: 10px;
  } */
  .el-link {
    margin-right: 5px;
  }
</style>

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