js 弹出下载

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/file.pdf', 'myfile.pdf');

function downloadDynamicContent(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URL对象
}

// 使用示例（下载文本文件）
downloadDynamicContent('Hello, world!', 'hello.txt', 'text/plain');