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(); }
