Function gmDownloadPromise

example/tests/gm_download_test.js:477–489

* Call GM.download (promise form). Returns the Promise itself plus the abort handle. * Also collects onprogress events.

(details)

   * Also collects onprogress events.
   */
  function gmDownloadPromise(details) {
    const progress = [];
    const opts = {
      ...details,
      onprogress(p) {
        progress.push(p);
        try { details.onprogress && details.onprogress(p); } catch {}
        updateProgress(p.loaded ?? p.done ?? 0, p.total ?? p.totalSize ?? -1);
      },
    };
    const ret = GM.download(opts);
    return { promise: ret, abort: ret && ret.abort, progress };
  }

  // ---------- The auto test suite ----------
  // Each entry: { name, manual?: boolean, run: async () => void }