js 浏览器中当前页下载文件

  downloadImg(url:string,name:string):void{
    let xhr = new XMLHttpRequest();
xhr.responseType = 'blob';
xhr.open('GET', url);
xhr.send();
xhr.addEventListener('load', function() {
  let blob = xhr.response;
  let downloadLink = document.createElement('a');
  downloadLink.href = URL.createObjectURL(blob);
  downloadLink.download = name;
  downloadLink.click();
});