How can i get upload pdf page count

Hai, 

I am using filereader for get file name. i can get pdf page count but if i choose large size pdf its cannot work. i have this error

This is my code

  className="file-input"
  id="file"
  ref={ref}
  type="file"
  accept="application/pdf"
  multiple
  name="files[]"
  onChange={Retrive_file}
/>;

const Retrive_file = (e) => {
  e.preventDefault();

 for (let i = 0; i < e.target.files.length; i++) {
    var file = e.target.files[i];
    if (file.type.split("/")[1] != "pdf") {
      setError("Choose only PDF files");
      return false;
    } else if (file.size < 1000) {
      setError("Choose valid PDF files");
      return false;
    }
    const files = e.target.files;
    const reader = new FileReader();
    reader.fileName = file.name;
    reader.fileSize = file.size;
    reader.readAsDataURL(file);
    reader.onloadend = (readerEvt) => {
      var data1 = readerEvt.target.result.split(",")[1];
      var binaryBlob = atob(data1);
      const pagecount = binaryBlob.match(/\/Type[\s]*\/Page[^s]/g).length;
      pdfpagecount = [...pdfpagecount, pagecount];
      readerEvt.target["checked"] = false;
      readerEvt.target["PageCount"] = pagecount;
      var data = pagecount;
    };
  }
};

How can i get page count in  large pdf with filereader