SOURCE

<button onclick="down()">下载课件</button>
<button onclick="down1()">下载课件1</button>

<script>
function dwonloadUrl(url, name) {
  const elink = document.createElement("a");
  elink.download = name;
  elink.target = "self";
  elink.style.display = "none";
  elink.href = url;
  document.body.appendChild(elink);
  elink.click();
  URL.revokeObjectURL(elink.href);
  document.body.removeChild(elink);
}


let down = function() {
    dwonloadUrl("https://hg-test.oss-cn-hangzhou.aliyuncs.com/Web/College/20210704/file/6b30b08e6e643aa6c72d9ff82d46759a.pptx", "xxx");
}

let down1 = function() {
    dwonloadUrl("http://hg-test.oss-cn-hangzhou.aliyuncs.com//upload/18128/e30e1356-ed22-4b91.pptx", "xxx");
}

</script>