[转] 如何在ie11里使用a连接创建动态下载文件流

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();
        }