luckysheet，是一款纯前端的在线excel，功能强大，完全开源
如果在线预览excel的需求，可以使用xlsx插件，但是这个插件只能解析表格中的数据，如果表格中的样式和数据都要解析出来，就需要luckysheet+luckyexcel方案，下面整理一下，vue项目中怎么使用
1.luckysheet需要手动引入相关文件

<link rel='stylesheet' href='https://cdn.jsdelivr.net/npm/luckysheet/dist/plugins/css/pluginsCss.css' />
<link rel='stylesheet' href='https://cdn.jsdelivr.net/npm/luckysheet/dist/plugins/plugins.css' />
<link rel='stylesheet' href='https://cdn.jsdelivr.net/npm/luckysheet/dist/css/luckysheet.css' />
<link rel='stylesheet' href='https://cdn.jsdelivr.net/npm/luckysheet/dist/assets/iconfont/iconfont.css' />
<script src="https://cdn.jsdelivr.net/npm/luckysheet/dist/plugins/js/plugin.js"></script>
<script src="https://cdn.jsdelivr.net/npm/luckysheet/dist/luckysheet.umd.js"></script>

2.安装luckyexcel，npm i luckyexcel
3.写一个vue组件测试一下，根据luckysheet官方文档和demo可以进行配置，里面有很多配置，下面的代码是参考官方demo的，删减了一下，主要需求是打开本地excel，先看一下打开效果(本地excel带样式的，在线打开还是带样式的)

<template>
  <div>
    <div style="position: absolute; top: 0">
      <input style="font-size: 16px" type="file" @change="uploadExcel" />
    </div>
    <div
      id="luckysheet"
      style="
        margin: 0px;
        padding: 0px;
        position: absolute;
        width: 100%;
        left: 0px;
        top: 30px;
        bottom: 0px;
      "
    ></div>
  </div>
</template>

<script>
import LuckyExcel from "luckyexcel";

export default {
  mounted() {
    $(function () {
      luckysheet.create({
        container: "luckysheet", // 设定DOM容器的id
        title: "Luckysheet Demo", // 设定表格名称
        lang: "zh", // 设定表格语言
        plugins: ["chart"],
        data: [
          {
            name: "Cell", //工作表名称
            color: "", //工作表颜色
            index: 0, //工作表索引
            status: 1, //激活状态
            order: 0, //工作表的下标
            hide: 0, //是否隐藏
            row: 36, //行数
            column: 18, //列数
            defaultRowHeight: 19, //自定义行高
            defaultColWidth: 73, //自定义列宽
            celldata: [], //初始化使用的单元格数据
            config: {
              merge: {}, //合并单元格
              rowlen: {}, //表格行高
              columnlen: {}, //表格列宽
              rowhidden: {}, //隐藏行
              colhidden: {}, //隐藏列
              borderInfo: {}, //边框
              authority: {}, //工作表保护
            },
            scrollLeft: 0, //左右滚动条位置
            scrollTop: 315, //上下滚动条位置
            luckysheet_select_save: [], //选中的区域
            calcChain: [], //公式链
            isPivotTable: false, //是否数据透视表
            pivotTable: {}, //数据透视表设置
            filter_select: {}, //筛选范围
            filter: null, //筛选配置
            luckysheet_alternateformat_save: [], //交替颜色
            luckysheet_alternateformat_save_modelCustom: [], //自定义交替颜色
            luckysheet_conditionformat_save: {}, //条件格式
            frozen: {}, //冻结行列配置
            chart: [], //图表配置
            zoomRatio: 1, // 缩放比例
            image: [], //图片
            showGridLines: 1, //是否显示网格线
            dataVerification: {}, //数据验证配置
          },
          {
            name: "Sheet2",
            color: "",
            index: 1,
            status: 0,
            order: 1,
            celldata: [],
            config: {},
          },
          {
            name: "Sheet3",
            color: "",
            index: 2,
            status: 0,
            order: 2,
            celldata: [],
            config: {},
          },
        ],
      });
    });
  },
  methods: {
    uploadExcel(evt) {
      const files = evt.target.files;
      if (files == null || files.length == 0) {
        alert("No files wait for import");
        return;
      }

      let name = files[0].name;
      let suffixArr = name.split("."),
        suffix = suffixArr[suffixArr.length - 1];
      if (suffix != "xlsx") {
        alert("Currently only supports the import of xlsx files");
        return;
      }
      LuckyExcel.transformExcelToLucky(
        files[0],
        function (exportJson, luckysheetfile) {
          if (exportJson.sheets == null || exportJson.sheets.length == 0) {
            alert(
              "Failed to read the content of the excel file, currently does not support xls files!"
            );
            return;
          }
          window.luckysheet.destroy();

          window.luckysheet.create({
            container: "luckysheet", //luckysheet is the container id
            showinfobar: false,
            data: exportJson.sheets,
            title: exportJson.info.name,
            userInfo: exportJson.info.name.creator,
          });
        }
      );
    },
  },
};
</script>

<style>
</style>