如何捕获websocket异常

Question

try catch 一直捕获不了异常WebSocket connection to 'ws://xxxxx:xxxx/' failed: Error in connection establishment: net::ERR_CONNECTION_TIMED_OUT异常发生在new websocket对象那里，网上看的onerror也没啥用啊

Answer 1

WebSocket的异常是异步的，你要用onerror方法获取异常

ws = new WebSocket('ws://xxxxx:xxxx/');

ws.onerror = function(e) {

    console.log(e);

};