function tableToExcel(data){
//要导出的数据,table表格字符串
var str = data;
//Worksheet名
var worksheet = 'Sheet1'
var uri = 'data:application/vnd.ms-excel;base64,';
//下载的表格模板数据
var template = `<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:x="urn:schemas-microsoft-com:office:excel" xmlns="http://www.w3.org/TR/REC-html40"><head><!--[if gte mso 9]><xml><x:ExcelWorkbook><x:ExcelWorksheets><x:ExcelWorksheet><x:Name>${worksheet}</x:Name><x:WorksheetOptions><x:DisplayGridlines/></x:WorksheetOptions></x:ExcelWorksheet></x:ExcelWorksheets></x:ExcelWorkbook></xml><![endif]--></head><body><table>${str}</table></body></html>`;
//下载模板
window.location.href = uri + base64(template)
}
//输出base64编码
function base64(s) { return window.btoa(unescape(encodeURIComponent(s))) }