Function send

scripts/run-javascript-headless-browser.mjs:108–116

(sessionId, method, params)

  };

  function send(sessionId, method, params) {
    const id = nextId++;
    const payload = { id, method, params: params || {} };
    if (sessionId) payload.sessionId = sessionId;
    return new Promise((resolve, reject) => {
      pending.set(id, { resolve, reject });
      ws.send(JSON.stringify(payload));
    });
  }

  await send(null, 'Target.setAutoAttach',
    { autoAttach: true, flatten: true, waitForDebuggerOnStart: false });