js下载cos或者oos资源

    const url = "http://cos.dshvv.com/aegis/xby.mp3";
    const btn = document.querySelector("button");
    btn.onclick = async () => {
      const blob = await fetch(url).then((res) => res.blob());
      const blobUrl = window.URL.createObjectURL(blob);
      const link = document.createElement("a");
      link.style.display = "none";
      link.target = "_blank";
      link.href = blobUrl;
      link.download = 'fileName'
      document.body.appendChild(link);
      link.click();
    };