js 静默下载

function downloadFile(url, filename) {
    const link = document.createElement('a');
    link.href = url;
    link.download = filename;
    link.style.display = 'none';
    document.body.appendChild(link);
    link.click();
    document.body.removeChild(link);
}

// 使用示例
downloadFile('https://example.com/file.pdf', 'file.pdf');

function downloadBlob(data, filename, mimeType) {
    const blob = new Blob([data], { type: mimeType });
    const url = URL.createObjectURL(blob);
    const link = document.createElement('a');
    link.href = url;
    link.download = filename;
    link.style.display = 'none';
    document.body.appendChild(link);
    link.click();
    document.body.removeChild(link);
    URL.revokeObjectURL(url); // 释放内存
}

// 使用示例
const data = "Hello, world!";
downloadBlob(data, 'hello.txt', 'text/plain');