# 前端心跳處理 > ws協議對長時間沒有發數據的連接會關閉, 已節省連接資源. ``` var heartCheck = { timeout: 60000,//60ms timeoutObj: null, serverTimeoutObj: null, reset: function(){ clearTimeout(this.timeoutObj); clearTimeout(this.serverTimeoutObj); 　　　　 this.start(); }, start: function(){ var self = this; this.timeoutObj = setTimeout(function(){ ws.send("HeartBeat"); self.serverTimeoutObj = setTimeout(function(){ ws.close();//如果onclose會執行reconnect，我們執行ws.close()就行了.如果直接執行reconnect 會觸發onclose導致重連兩次 }, self.timeout) }, this.timeout) }, } ws.onopen = function () { heartCheck.start(); }; ws.onmessage = function (event) { heartCheck.reset(); } ws.onclose = function () { reconnect(); }; ws.onerror = function () { reconnect(); }; ``` - 參考資料: [https://www.jianshu.com/p/dfde99d46ef4](https://www.jianshu.com/p/dfde99d46ef4)