主要接口：

add_sheet(Excel名称，表头字段， 表数据 )

export( 导出文件名称 )

注意：调用多次add_sheet就会生成一个多页Excel

示例代码：

excel.add_sheet('test',['姓名','电话号码'],[['xt','13333333'],['xe','8888888888']]);   
excel.add_sheet('第二表格',['姓名','电话号码'],[['xt','166666'],['xe','66666']]);  
excel.export( '哈哈哈');

主要代码如下：

var excel = {version:0.01,sheets:[]};           
var tmplWorkbookXML = ''
              +''
              + 'ZhangYe{created}'
              + ''
              + ''
              + ''
              + ''
              + '{worksheets}'
            , tmplWorksheetXML = '
{rows}'
            , tmplCellXML = '{data}';
        excel.add_sheet = function( _title, _fields, _data ){
            var _t = {};
            _t.title = _title;
            _t.fields = _fields;
            _t.data = _data;
            excel.sheets.push( _t );
        }
        excel.format = function(s, c) { return s.replace(/{(\w+)}/g, function(m, p) { return c[p]; }) }
        excel.base64 = function(s) { return window.btoa(unescape(encodeURIComponent(s))) }
        excel.export =  function( _title ) {
            if( !this.sheets || this.sheets.length < 1 )
                return false;
            var ctx = "";
            var workbookXML = "";
            var worksheetsXML = "";
            var rowsXML = "";
            var rowdata = null;
            for (var i = 0; i < this.sheets.length; i++) {
                this.sheets[i].data.unshift( this.sheets[i].fields );
                for (var j = 0; j < this.sheets[i].data.length; j++) {
                    rowsXML += '';
                    for (var k = 0; k < this.sheets[i].data[j].length; k++) {
                        var dataValue = this.sheets[i].data[j][k];
                        ctx = {  attributeStyleID:''
                               , nameType:'String'
                               , data: (dataValue)? dataValue : ''
                               , attributeFormula:''
                              };
                        rowsXML += this.format(tmplCellXML, ctx);
                   }
                  rowsXML += ''
                }
                ctx = {rows: rowsXML, nameWS: this.sheets[i].title || 'Sheet' + i};
                worksheetsXML += this.format(tmplWorksheetXML, ctx);
                rowsXML = "";
              }
              ctx = {created: (new Date()).getTime(), worksheets: worksheetsXML};
              workbookXML = this.format(tmplWorkbookXML, ctx);
              if( _title ) _title + '.xls';
              var download = _title || 'Workbook.xls';
              var blob = new Blob([ workbookXML], {
                    type: "application/vnd.ms-excel;charset=charset=utf-8"
                });
                saveAs(blob,  download);
            }

使用到库有：

filesaver