PDF is blank when downloading using javascript

Question

I have a web service that returns PDF file content in its response. I want to download this as a pdf file when user clicks the link. The javascript code that I have written

Answer 1

solved it via XMLHttpRequest and xhr.responseType = 'arraybuffer'; code:

var xhr = new XMLHttpRequest();
    xhr.open('GET', './api/exportdoc/report_'+id, true);
    xhr.responseType = 'arraybuffer';
    xhr.onload = function(e) {
       if (this.status == 200) {
          var blob=new Blob([this.response], {type:"application/pdf"});
          var link=document.createElement('a');
          link.href=window.URL.createObjectURL(blob);
          link.download="Report_"+new Date()+".pdf";
          link.click();
       }
    };
xhr.send();