baseddata.io/layouts/shortcodes/download-data.html

<button class="download-button" onclick="downloadFile('{{ .Get "src" }}', '{{ .Get "name" }}')">
  Download
</button>

<script>
  async function downloadFile(url, name) {
    try {
      const response = await fetch(url);
      if (!response.ok) {
        throw new Error('Network response was not ok');
      }
      const blob = await response.blob();
      const link = document.createElement('a');
      link.href = URL.createObjectURL(blob);
      link.download = name;
      document.body.appendChild(link);
      link.click();
      document.body.removeChild(link);
      URL.revokeObjectURL(link.href); // Clean up the object URL
    } catch (error) {
      console.error('Error downloading the file:', error);
    }
  }
</script>