官方解釋：Blob是一個類文件的不可變的原始數據對象，非javascript原生數據類型，File對象就是繼承自Blob對象，且在Blob的基礎上進行擴展，以便支持用戶系統上的文件。
先貼下載代碼
var html = '<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>Sheet1</x:Name><x:WorksheetOptions><x:DisplayGridlines/></x:WorksheetOptions></x:ExcelWorksheet></x:ExcelWorksheets></x:ExcelWorkbook></xml><![endif]--></head><body>' + document.getElementsByClassName("projectTable")[0].outerHTML + "</body></html>"; var blob = new Blob([html], { type: "application/vnd.ms-excel" });
var a = document.createElement("a"); a.href = URL.createObjectURL(blob); a.download = "工程統計表.xls"; document.body.appendChild(a); a.onclick = function() { document.body.removeChild(a); }; a.click();
如果直接使用Blob下載，其他瀏覽器正常但在ie會出現這樣的問題無法正常下載
百度發現：微軟在ie10 和ie11中有兩個能解決這個問題的方法：window.navigator.msSaveBlob和window.navigator.msSaveOrOpenBlob 方法，這兩個方法的區別在於，The Navigator.msSaveOrOpenBlob() method saves the File or Blob to disk. This method behaves in the same way as Navigator.msSaveBlob() except that this enables the file open option.（前者只有保存，后者有保存和打開兩個選項）
msSaveOrOpenBlob 官方解釋：Launches the associated application for a File or Blob.（啟動File或Blob的關聯應用程序）
解決方法：
var html = '<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>Sheet1</x:Name><x:WorksheetOptions><x:DisplayGridlines/></x:WorksheetOptions></x:ExcelWorksheet></x:ExcelWorksheets></x:ExcelWorkbook></xml><![endif]--></head><body>' + document.getElementsByClassName("projectTable")[0].outerHTML + "</body></html>"; var blob = new Blob([html], { type: "application/vnd.ms-excel" }); //判斷ie if (window.navigator && window.navigator.msSaveOrOpenBlob) { window.navigator.msSaveOrOpenBlob(blob, "工程統計表.xls"); } else { var a = document.createElement("a"); a.href = URL.createObjectURL(blob); a.download = "工程統計表.xls"; document.body.appendChild(a); a.onclick = function() { document.body.removeChild(a); }; a.click(); }