websocket

var ws = new WebSocket(‘ws://localhost:8080‘);

switch (ws.readyState) {
    case WebSocket.CONNECTING:
    // do something
    break;
    case WebSocket.OPEN:
    // do something
    break;
    case WebSocket.CLOSING:
    // do something
    break;
    case WebSocket.CLOSED:
    // do something
    break;
    default:
    // this never happens
    break;
}

ws.onopen = function () {
    ws.send(‘Hello Server!‘);
}
// 如果要指定多个回调函数，可以使用addEventListener方法。
ws.addEventListener(‘open‘, function (event) {
    ws.send(‘Hello Server!‘);
});

ws.onclose = function(event) {
    var code = event.code;
    var reason = event.reason;
    var wasClean = event.wasClean;
    // handle close event
};
ws.addEventListener("close", function(event) {
    var code = event.code;
    var reason = event.reason;
    var wasClean = event.wasClean;
    // handle close event
});

ws.onmessage = function(event) {
    var data = event.data;
    // 处理数据
};
    
ws.addEventListener("message", function(event) {
    var data = event.data;
    // 处理数据
});

ws.send(‘your message‘);

socket.onerror = function(event) {
    // handle error event
};
    
socket.addEventListener("error", function(event) {
    // handle error event
});

var data = new ArrayBuffer(10000000);
socket.send(data);

if (socket.bufferedAmount === 0) {
// 发送完毕
} else {
// 发送还没结束
}