WebSocket không connect được

1. File WebSocketConfig em sẽ cần sửa:

@Override
public void registerStompEndpoints(StompEndpointRegistry registry) {
	registry
		.addEndpoint("/websocket")
		.setAllowedOrigins("*")
		.withSockJS();
//		registry.addEndpoint("/websoket").withSockJS();
}

File main.js

function connect() {
....
   var socket = new SockJS('http://localhost:8083/websocket');
}

File test.html

<button type="button" class="accent username-submit" onclick="connect();">Bat dau tro chuyen</button>