问检查响应后，发送第二个响应

EN

app.post('/demo', (request, response) => {
    const data = {"name": "john", "surname": "doe"};
    const check = "Schedulable";
    
    if(check == "Schedulable"){
      response.send(check);       //I need to know if it is schedulable on client-side. Because i will use this information on client-side. How can i send string information. After that i want to send json object.
      response.json(data);
    }
    else{
      response.send("Not Schedulable");
    }    
    
});
Client-side Code:
{
    const response = await fetch('/demo', options);
    const info = await response.json();
    
    //Normally i do this when i receive a single response. How can i do when i have double response.
}