Function dispatchCmd

example/tests/gm_value_test.js:1073–1090

(targetId, cmd)

  /* ── dispatchCmd ───────────────────────────────────────── */
  function dispatchCmd(targetId, cmd) {
    if (targetId === 'main') {
      window._gmtest_mainDispatch(cmd);
      return;
    }

    const win = iframeWindows[targetId];

    if (win) {
      sendCmd(win, cmd, {});
    } else {
      appendLog(targetId, {
        t: nowTime(),
        msg: '⚠️ iframe not ready yet — try again',
        type: 'warn',
      });
    }
  }

  /* ── UI helpers ─────────────────────────────────────────── */
  function appendLog(fid, entry) {