HTML5 Development Tour WebSocket Add Event Listener (6)

WebSocket programming follows the asynchronous programming model; After opening the socket, just wait for the event to occur, instead of actively polling the server, you need to add a callback function to the WebSocket object to listen for the event.

The WebSocket object has three events: Open,close and message. The Open event is triggered when the connection is established, and the message event is triggered when the messages are received, and the close event is triggered when the WebSocket connection is closed. With most JavaScript API, event handling invokes the corresponding (OnOpen, onmessage, and OnClose) callback functions.

1W.onopen =function () {2Log"Open");3W.send ("Thank you for accepting this websocket request! ");4 }5W.onmessage =function (e) {6 log (e.data);7 }8W.onclose =function (e) {9Log"closed");Ten}