Download with Progress

import { http, os, path } from "@tynd/core/client";
 
export async function downloadWithProgress(
  url: string,
  filename: string,
  onProgress: (pct: number, loaded: number, total: number | null) => void,
) {
  const downloads = (await os.downloadsDir()) ?? (await os.homeDir());
  const dest = path.join(downloads ?? "", filename);
 
  await http.download(url, dest, {
    onProgress: ({ loaded, total }) => {
      const pct = total ? (loaded / total) * 100 : 0;
      onProgress(pct, loaded, total);
    },
  });
 
  return dest;
}
 
// usage
const saved = await downloadWithProgress(
  "https://example.com/big.zip",
  "big.zip",
  (pct, loaded, total) => {
    progressBar.style.width = `${pct.toFixed(1)}%`;
    label.textContent = total
      ? `${formatBytes(loaded)} / ${formatBytes(total)} (${pct.toFixed(1)}%)`
      : formatBytes(loaded);
  },
);
 
function formatBytes(n: number) {
  const u = ["B", "KB", "MB", "GB"];
  let i = 0;
  while (n >= 1024 && i < u.length - 1) { n /= 1024; i++; }
  return `${n.toFixed(1)} ${u[i]}`;
}