Function sendCmd

example/tests/gm_value_test.js:101–103

(win, cmd, data = {})

  }

  function sendCmd(win, cmd, data = {}) {
    win.postMessage({ t: MSG_NS + 'CMD', cmd, ...data }, TARGET_ORIGIN);
  }

  /* ══════════════════════════════════════════════════════════
     IFRAME FRAME LOGIC