[From] https://segmentfault.com/q/1010000009470664

查了資料，可以使用微軟獨家的msSaveBlob， 這個方法支持ie10及以上。

var downloadFileName = self.formatTimestamp()+ ‘-‘ + self.logFilename;

        if(window.navigator.msSaveBlob){
            // for ie 10 and later
            try{
                var blobObject = new Blob([self.output]); 
                window.navigator.msSaveBlob(blobObject, downloadFileName); 
            }
            
 
catch(e){
                console.log(e);
            }
        }
        else{
            var file = "data:text/plain;charset=utf-8,";
            var logFile = self.output;
            var encoded = encodeURIComponent(logFile);
            file += encoded;
            var a = document.createElement(‘a‘);
            a.href 
 
= file;
            a.target   = ‘_blank‘;
            a.download = downloadFileName;
            document.body.appendChild(a);
            a.click();
            a.remove();
        }

[轉] 如何在ie11裏使用a連接創建動態下載文件流