小编For*_*ser的帖子

我正在尝试使用socket.io客户端连接到服务器io.js + socket.io.它以xhr轮询请求开始,连接事件甚至第一条消息都通过xhr接收,然后升级到websocket.如何检测传输开关何时进行记录(两侧)？

简化的服务器代码:

io.on("connection",function(socket){
    console.log("transport",socket.conn.transport.name); //will print "polling"
    socket.on("join",function(data){
        console.log("transport",socket.conn.transport.name); //will print "polling" (usualy)
        console.log("userjoined",data.userInfo);
    });
    socket.on("testMsg",function(data){
        console.log("transport",socket.conn.transport.name); //will print "websocket" (if it supported and already switched)
    });
    socket.emit("hello","hello");
})

简化的客户端代码:

var socket = io.connect();
socket.on("hello",function(data){
    socket.emit("join",{userInfo: {name:"someName"}});
    setTimeout(function(){
        socket.emit("testMsg",{}); 
    },8000)
});

我用这样的代码渲染 grecaptcha

let callback;
const p = new Promise((resolve) => callback = (result) => resolve(result));

grecaptcha.render(el, {
    sitekey: window.settings.recaptchaKey,
    size: "invisible",
    type: "image",
    callback: result => callback(result),
    badge: "inline"
});

const key = await p;

一切正常，但如果用户单击 recaptcha 模式的背景，recaptcha 会关闭并且我无法检测到它，所以我无限等待响应

我需要某种事件或回调来检测它何时关闭