一、实现效果

二、实现步骤

print.js插件，可以打印html、pdf、json数据等。

官网：https://printjs.crabbly.com/

【1】安装插件

npm install print-js --save

【2】在需要打印的页面导入

import print from 'print-js'

【3】在vue文件中需要打印的部分外层套一层div，给div设置id。作为打印的区域

<el-table :data="showData" id="printBox" style="display: flex;">
      <el-table-column type="index" label="序号" width="180" align="center"></el-table-column>
      <el-table-column prop="adminname" label="账号" align="center"></el-table-column>
      <el-table-column label="权限" align="center">
        <template #default="{ row }">
          <el-tag v-if="row.role == 1" type="" effect="dark">
            管理员
          </el-tag>
          <el-tag v-else-if="row.role == 2" type="warning" effect="dark">
            超级管理员
          </el-tag>
          <el-tag v-else type="info" effect="dark">
            未知
          </el-tag>
        </template>
      </el-table-column>
      <el-table-column label="操作" align="center">
        <template #default="{ row }">
          <el-button circle type="success" @click="editHandler(row)">
            <el-icon>
              <Edit></Edit>
            </el-icon>
          </el-button>

          <el-popconfirm title="你确定删除吗?" confirm-button-text="是" cancel-button-text="取消" @confirm="delHandler(row)">
            <template #reference>
              <el-button circle type="danger">
                <el-icon>
                  <Delete></Delete>
                </el-icon>
              </el-button>
            </template>
          </el-popconfirm>
        </template>
      </el-table-column>
    </el-table>

【4】在打印按钮上添加打印事件

    <el-button type="primary" @click="printBox">打印</el-button>

【5】在methods中添加点击事件

必要的就是printable和bype

methods: {
    printBox() {
      setTimeout(function () {
        print({
          printable: 'printBox',
          type: 'html',
          scanStyles: false,
          targetStyles: ['*']
        })
      }, 500)
    },
}

三、完整代码

<template>
  <el-breadcrumb class="breadcrumb" separator="/">
    <el-breadcrumb-item :to="{ path: '/layout' }">主页</el-breadcrumb-item>
    <el-breadcrumb-item>账号管理</el-breadcrumb-item>
    <el-breadcrumb-item>管理员列表</el-breadcrumb-item>
  </el-breadcrumb>
  <div>
    <!-- 按钮 -->
    <el-button type="primary" @click="openAdd">添加管理员</el-button>
    <el-button type="primary" @click="printBox">打印</el-button>
    <!-- 表格 -->
    <el-table :data="showData" id="printBox" style="display: flex;">
      <el-table-column type="index" label="序号" width="180" align="center"></el-table-column>
      <el-table-column prop="adminname" label="账号" align="center"></el-table-column>
      <el-table-column label="权限" align="center">
        <template #default="{ row }">
          <el-tag v-if="row.role == 1" type="" effect="dark">
            管理员
          </el-tag>
          <el-tag v-else-if="row.role == 2" type="warning" effect="dark">
            超级管理员
          </el-tag>
          <el-tag v-else type="info" effect="dark">
            未知
          </el-tag>
        </template>
      </el-table-column>
      <el-table-column label="操作" align="center">
        <template #default="{ row }">
          <el-button circle type="success" @click="editHandler(row)">
            <el-icon>
              <Edit></Edit>
            </el-icon>
          </el-button>

          <el-popconfirm title="你确定删除吗?" confirm-button-text="是" cancel-button-text="取消" @confirm="delHandler(row)">
            <template #reference>
              <el-button circle type="danger">
                <el-icon>
                  <Delete></Delete>
                </el-icon>
              </el-button>
            </template>
          </el-popconfirm>
        </template>
      </el-table-column>
    </el-table>
    <!-- 分页器 -->
    <div class="pagination">
      <el-pagination v-model:current-page="count" v-model:page-size="limitNum" :page-sizes="[1, 3, 5, 8]"
        layout="total, sizes, prev, pager, next, jumper" :total="allData.length" />
    </div>
    <!-- 抽屉 -->
    <el-drawer v-model="isShow">
      <template #header>
        <h4>{{ type }} 管理员</h4>
      </template>
      <template #default>
        <div>
          <el-form :model="form">
            <el-form-item label="账号" size="small">
              <el-input v-model="form.adminname">
              </el-input>
            </el-form-item>

            <el-form-item label="密码">
              <el-input v-model="form.password">
              </el-input>
            </el-form-item>

            <el-form-item label="角色">
              <el-select v-model="form.role">
                <el-option label="管理员" :value="1">
                </el-option>
                <el-option label="超级管理员" :value="2">
                </el-option>
              </el-select>
            </el-form-item>

            <el-form-item label="权限">
              <el-tree ref="treeRef" :data="treeData" show-checkbox default-expand-all node-key="path"
                :props="defaultProps" />
            </el-form-item>


          </el-form>
        </div>
      </template>

      <template #footer>
        <div style="flex:auto">
          <el-button @click="cancelClick">取消</el-button>
          <el-button type="primary" @click="confirmClick">确定</el-button>
        </div>
      </template>

    </el-drawer>

  </div>
</template>

<script>
import print from 'print-js'
import { formatRoutes } from "@/utils/tools"
import { getAdminList, addAdmin, updataAdmin, delAdmin } from '@/apis/user'
export default {
  data() {
    return {
      // 当前页码
      count: 1,
      // 每页显示条数
      limitNum: 3,
      // 所有管理员列表信息
      allData: [],
      // 管理员抽屉的数据
      form: {
        adminname: '',
        password: '',
        role: 1,
      },
      // 抽屉是否显示
      isShow: false,
      // 区别当前是添加管理员还是更新管理员
      type: '',
      // 树节点信息
      treeData: [],
      // 要显示的元素
      defaultProps: {
        children: 'children',
        label: function (data) {
          // label设置要显示的文字信息，lable的值可以是函数
          return data.meta.title
        }
      }
    };
  },
  watch: {
    isShow(value) {
      if (!value) {
        this.form = {}
      }
      this.$refs.treeRef?.setCheckedNodes([])
    }
  },
  computed: {
    showData() {
      return this.allData.slice((this.count - 1) * this.limitNum, this.count * this.limitNum)
    }
  },
  mounted() {
    this.getAllData(),
      this.treeData = formatRoutes(this.$router.getRoutes())
  },
  methods: {
    printBox() {
      setTimeout(function () {
        print({
          printable: 'printBox',
          type: 'html',
          scanStyles: false,
          targetStyles: ['*']
        })
      }, 500)
    },

    delHandler(row) {
      delAdmin({ adminid: row.adminid }).then(data => {
        this.getAllData()
      })

    },
    cancelClick() {
      this.isShow = false
    },
    confirmClick() {
      this.isShow = false
      // 获取表单数据和树形菜单数据，调用 添加、修改接口
      // getCheckedNodes,选中的节点的数据
      // 第一个false:选中父节点，字节点数据都获取
      // 第二个true:无论父节点有没有被选中，选中的子节点都能获取
      if (this.type == '添加') {
        addAdmin({
          ...this.form,
          checkedKeys: this.$refs.treeRef?.getCheckedNodes(false, true)
        }).then(res => {
          this.getAllData()
        })
      } else {
        updataAdmin({
          ...this.form,
          checkedKeys: this.$refs.treeRef?.getCheckedNodes(false, true)
        }).then(res => {
          this.getAllData()
        })
      }
    },
    // 获取所有管理员列表信息
    getAllData() {
      getAdminList().then(res => {
        console.log("管理员列表", res)
        this.allData = res.data
        this.count = 1
      })
    },
    editHandler(row) {
      this.type = '修改',
        this.isShow = true
      this.form = {
        adminname: row.adminname,
        password: row.password,
        role: row.role
      }
    },
    openAdd() {
      this.type = '添加',
        this.isShow = true
    }
  },
};
</script>

<style lang="scss" scoped>
.breadcrumb {
  margin-bottom: 25px;

}

.pagination {
  display: flex;
  justify-content: center;

  .el-pagination {
    margin: 10px;
  }
}
</style>

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