socketio端点API

 const socket = io("https://example.com"); // the main namespace

    
 const productSocket = io("https://example.com/product", { forceNew: true }); // the "product" namespace
    
 const orderSocket = io("https://example.com/order", { forceNew: true }); // the "order" namespace
    
    
    
    

    const socket = io("https://example.com", { transports: ["websocket"] });