Download a file from same/different origin.

download.js

//It is important to add the origin to the AllowedOrigins on your backend. Avoid using wildcard like '*' - chances it will not work.
function forceDownload(url, fileName) {
  const xhr = new XMLHttpRequest();
  xhr.open("GET", url, true);
  xhr.setRequestHeader("Access-Control-Allow-Origin", "*");
  xhr.responseType = "blob";
  xhr.onload = function () {
    const urlCreator = window.URL || window.webkitURL;
    const imageUrl = urlCreator.createObjectURL(this.response);
    const tag = document.createElement("a");
    tag.href = imageUrl;
    tag.download = fileName;
    document.body.appendChild(tag);
    tag.click();
    document.body.removeChild(tag);
  };
  xhr.send();
}