js window 下载文件

function downloadFile(url, filename) {
  const a = document.createElement('a');
  a.href = url;
  a.download = filename || 'download';
  document.body.appendChild(a);
  a.click();
  document.body.removeChild(a);
}

// 使用示例
downloadFile('path/to/your/file.pdf', 'myFile.pdf');

function downloadBlob(content, filename, mimeType) {
  const blob = new Blob([content], { type: mimeType || 'application/octet-stream' });
  const url = URL.createObjectURL(blob);
  const a = document.createElement('a');
  a.href = url;
  a.download = filename || 'download';
  document.body.appendChild(a);
  a.click();
  document.body.removeChild(a);
  URL.revokeObjectURL(url); // 释放内存
}

// 使用示例：下载一个文本文件
const textContent = 'Hello, world!';
downloadBlob(textContent, 'hello.txt', 'text/plain');