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);};