vue导出excel数据表格功能(代码片段)

/* eslint-disable */
require(‘script-loader!file-saver‘);
// require(‘script-loader!src/vendor/Blob‘);
require(‘script-loader!../../assets/js/Blob‘);
require(‘script-loader!xlsx/dist/xlsx.core.min‘);

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];
      if (cell.v == null) continue;
      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);
  console.log(‘a‘)
  var oo = generateArray(theTable);
  var ranges = oo[1];

  /* original data */
  var data = oo[0];
  var ws_name = "SheetJS";
  console.log(data);

  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")


function formatJson(jsonData) 
  console.log(jsonData)


export function export_json_to_excel(th, jsonData, defaultTitle) 

  /* original data */

  var data = jsonData;
  data.unshift(th);
  var ws_name = "SheetJS";

  var wb = new Workbook(), ws = sheet_from_array_of_arrays(data);


  /* 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‘);
  var title = defaultTitle || ‘列表‘
  saveAs(new Blob([s2ab(wbout)], type: "application/octet-stream"), title + ".xlsx")

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