text: import { saveAs } from "file-saver";
  // import XLSX from "xlsx";
  import XLSX from "xlsx-style";
  
  function generateArray(table) {
    var out = [];
    var rows = table.querySelectorAll("tr");
    var ranges = [];
    for (var R = 0; R < rows.length; ++R) {
      var outRow = [];
      var row = rows[R];
      var columns = row.querySelectorAll("td");
      for (var C = 0; C < columns.length; ++C) {
        var cell = columns[C];
        var colspan = cell.getAttribute("colspan");
        var rowspan = cell.getAttribute("rowspan");
        var cellValue = cell.innerText;
        if (cellValue !== "" && cellValue == +cellValue) cellValue = +cellValue;
        
        //Skip ranges
        ranges.forEach(function (range) {
          if (
            R >= range.s.r &&
            R <= range.e.r &&
            outRow.length >= range.s.c &&
            outRow.length <= range.e.c
          ) {
            for (var i = 0; i <= range.e.c - range.s.c; ++i) outRow.push(null);
          }
        });
  
        //Handle Row Span
        if (rowspan || colspan) {
          rowspan = rowspan || 1;
          colspan = colspan || 1;
          ranges.push({
            s: {
              r: R,
              c: outRow.length
            },
            e: {
              r: R + rowspan - 1,
              c: outRow.length + colspan - 1
            }
          });
        }
  
        //Handle Value
        outRow.push(cellValue !== "" ? cellValue : null);
  
        //Handle Colspan
        if (colspan)
          for (var k = 0; k < colspan - 1; ++k) outRow.push(null);
      }
      out.push(outRow);
    }
    return [out, ranges];
  }
  
  function datenum(v, date1904) {
    if (date1904) v += 1462;
    var epoch = Date.parse(v);
    return (epoch - new Date(Date.UTC(1899, 11, 30))) / (24 * 60 * 60 * 1000);
  }
  
  function sheet_from_array_of_arrays(data, opts) {
    var ws = {};
    var range = {
      s: {
        c: 10000000,
        r: 10000000
      },
      e: {
        c: 0,
        r: 0
      }
    };
    for (var R = 0; R != data.length; ++R) {
      for (var C = 0; C != data[R].length; ++C) {
        if (range.s.r > R) range.s.r = R;
        if (range.s.c > C) range.s.c = C;
        if (range.e.r < R) range.e.r = R;
        if (range.e.c < C) range.e.c = C;
        var cell = {
          v: data[R][C]
        };
        // 如果单元格所在的值为空，让其值为“——”，否则下面设置的边框对其不生效
        if (cell.v == null) {
          cell.v = "——";
        }
        var cell_ref = XLSX.utils.encode_cell({
          c: C,
          r: R
        });
  
        if (typeof cell.v === "number") cell.t = "n";
        else if (typeof cell.v === "boolean") cell.t = "b";
        else if (cell.v instanceof Date) {
          cell.t = "n";
          cell.z = XLSX.SSF._table[14];
          cell.v = datenum(cell.v);
        } else cell.t = "s";
  
        ws[cell_ref] = cell;
      }
    }
    if (range.s.c < 10000000) ws["!ref"] = XLSX.utils.encode_range(range);
    return ws;
  }
  
  function Workbook() {
    if (!(this instanceof Workbook)) return new Workbook();
    this.SheetNames = [];
    this.Sheets = {};
  }
  
  function s2ab(s) {
    var buf = new ArrayBuffer(s.length);
    var view = new Uint8Array(buf);
    for (var i = 0; i != s.length; ++i) view[i] = s.charCodeAt(i) & 0xff;
    return buf;
  }
  
  export function export_table_to_excel(id) {
    var theTable = document.getElementById(id);
    var oo = generateArray(theTable);
    var ranges = oo[1];
  
    /* original data */
    var data = oo[0];
    var ws_name = "SheetJS";
  
    var wb = new Workbook(),
      ws = sheet_from_array_of_arrays(data);
  
    /* add ranges to worksheet */
    // ws['!cols'] = ['apple', 'banan'];
    ws["!merges"] = ranges;
  
    /* add worksheet to workbook */
    wb.SheetNames.push(ws_name);
    wb.Sheets[ws_name] = ws;
  
    var wbout = XLSX.write(wb, {
      bookType: "xlsx",
      bookSST: false,
      type: "binary"
    });
  
    saveAs(
      new Blob([s2ab(wbout)], {
        type: "application/octet-stream"
      }),
      "test.xlsx"
    );
  }
  // 主要修改内容在这里
  export function export_json_to_excel({
    title, // 新增的参数，表格标题
    multiHeader = [],
    header,
    data,
    filename,
    merges = [],
    autoWidth = true,
    bookType = "xlsx"
  } = {}) {
    /* original data */
    filename = filename || "excel-list";
    data = [...data];
    data.unshift(header);
    for (let i = multiHeader.length - 1; i > -1; i--) {
      data.unshift(multiHeader[i]);
    }
    data.unshift(title); // 表格标题
    var ws_name = "SheetJS";
    var wb = new Workbook(),
    ws = sheet_from_array_of_arrays(data);
    if (merges.length > 0) {
      if (!ws["!merges"]) ws["!merges"] = [];
      merges.forEach(item => {
        ws["!merges"].push(XLSX.utils.decode_range(item));
      });
    }
  
  // 设置单元格宽度
    if (autoWidth) {
      /*设置worksheet每列的最大宽度*/
      const colWidth = data.map(row =>
        row.map(val => {
          /*先判断是否为null/undefined*/
          if (val == null || val == undefined) {
            return {
              wch: 10
            };
          } else if (val.toString().charCodeAt(0) > 255) {
            /*再判断是否为中文*/
            return {
              wch: val.toString().length * 2
            };
          } else {
            return {
              wch: val.toString().length * 1.5
            };
          }
        })
      );
      /*以主表第二行为初始值，因为我的第一行是表格标题，会比较长，所以以主表第二行为初始值*/
      let result = colWidth[1];
      for (let i = 1; i < colWidth.length; i++) {
        for (let j = 0; j < colWidth[i].length; j++) {
          if (result[j]["wch"] < colWidth[i][j]["wch"]) {
            result[j]["wch"] = colWidth[i][j]["wch"];
          }
        }
      }
      ws["!cols"] = result;
    }
    /* add worksheet to workbook */
    wb.SheetNames.push(ws_name);
    wb.Sheets[ws_name] = ws;
  
    var dataInfo = wb.Sheets[wb.SheetNames[0]];
      // 设置单元格框线
    const borderAll = {
      top: {
        style: "thin"
      },
      bottom: {
        style: "thin"
      },
      left: {
        style: "thin"
      },
      right: {
        style: "thin"
      }
    };
    
    // 给所有单元格加上边框，内容居中，字体，字号，标题表头特殊格式部分后面替换
    for (var i in dataInfo) {
      if (
        i == "!ref" ||
        i == "!merges" ||
        i == "!cols" ||
        i == "!rows" ||
        i == "A1"
      ) { } else {
        dataInfo[i + ""].s = {
          border: borderAll,
          alignment: {
            horizontal: "center",
            vertical: "center"
          },
          font: {
            name: "微软雅黑",
            sz: 10
          }
        };
      }
    }
    
    // 设置表格样式
    const arrabc = ["A",
      "B",
      "C",
      "D",
      "E",
      "F",
      "G",
      "H",
      "I",
      "J",
      "K",
      "L",
      "M",
      "N",
      "O",
      "P",
      "Q",
      "R",
      "S",
      "T",
      "U",
      "V",
      "W",
      "X",
      "Y",
      "Z"
    ]
    
    // 给标题、表格描述信息、表头等部分加上特殊格式
    arrabc.some(function (v) {
      for (let j = 1; j < multiHeader.length + 3; j++) {
        const _v = v + j
        if (dataInfo[_v]) {
          dataInfo[_v].s = {};
          // 标题部分A1-Z1
          if (j == 1) {
            dataInfo[v + j].s = {
              font: {
                name: "微软雅黑",
                sz: 12,
                color: {
                  rgb: "000000"
                },
                bold: true,
                italic: false,
                underline: false
              },
              alignment: {
                horizontal: "center",
                vertical: "center"
              }
            };
          } else {
          // 表头部分,根据表头特殊格式设置
            if (multiHeader.length == 0) {
            // multiHeader.length = 0 时表头没有合并单元格，表头只占1行A2-Z2
              const fv = v + (multiHeader.length + 2)
              dataInfo[fv].s = {
                border: borderAll,
                font: {
                  name: "微软雅黑",
                  sz: 11,
                  bold: true
                },
                alignment: {
                  horizontal: "center",
                  vertical: "center"
                },
                fill: {
                  fgColor: {
                    rgb: "f0f0f0"
                  },
                },
              }
            } else if (multiHeader.length == 1) {
            // multiHeader.length = 0 时表头有合并单元格，表头只占2行A2-Z2，A3-Z3，这是没有描述信息只有表头合并的
              dataInfo[v + j].s = {
                border: borderAll,
                font: {
                  name: "微软雅黑",
                  sz: 11,
                },
                alignment: {
                  horizontal: "center",
                  vertical: "center"
                },
                fill: {
                  fgColor: {
                    rgb: "f0f0f0"
                  }
                },
              }
            } else {
             // multiHeader.length = 0 时表头有合并单元格，表头多行
              dataInfo[v + j].s = {
                border: borderAll,
                font: {
                  name: "微软雅黑",
                  sz: 9,
                },
                alignment: {
                  horizontal: "left",
                  vertical: "center"
                }
              }
            }
          }
          // multiHeader.length + 2 是表头的最后1行
          dataInfo[v + (multiHeader.length + 2)].s = {
            border: borderAll,
            font: {
              name: "微软雅黑",
              sz: 10,
            },
            alignment: {
              horizontal: "center",
              vertical: "center"
            },
            fill: {
              fgColor: {
                rgb: "f0f0f0"
              }
            },
          }
        }
      }
    });
    
    var wbout = XLSX.write(wb, {
      bookType: bookType,
      bookSST: false,
      type: "binary"
    });
    saveAs(
      new Blob([s2ab(wbout)], {
        type: "application/octet-stream"
      }),
      `${filename}.${bookType}`
    );
  }