Aspose.Page for JavaScript via C++ Release Notes

Major Features

Added a function AsposeGetXpsPageCount() that returns the total number of pages in a XPS-document.

<script type="text/javascript" async src="AsposePageforJS.js" onload="onloadAsposePageforJS();"></script>
<script type="text/javascript">
  var blob,name;

  var fGetPageCount = function (e) {
    const file_reader = new FileReader();
    file_reader.onload = (event) => {
      const json = AsposeGetXpsPageCount(event.target.result, e.target.files[0].name);
      if (json.errorCode == 0) {
        document.getElementById('output').textContent = "Pages count: " + json.pageCount.toString();
      }
      else 
        document.getElementById('output').textContent = json.errorText;
    }
    file_reader.readAsArrayBuffer(e.target.files[0]);
  }

</script>

For more details see Aspose.Page for JavaScript Documentation.