如何用 JS 下载文件

实现

/**
 * 
 * @param {String} url
 * 
 * create a DOM Element
 * <a href="url" download/> 
 */
const downloadFile = (url) => {
  const downloadLink = document.createElement('a');
  const body = document.documentElement || document.body;
  body.appendChild(downloadLink);
  downloadLink.href = url;
  downloadLink.download = true;

  downloadLink.click();
  body.removeChild(downloadLink);
}