Vue中監聽窗口關閉事件，並在窗口關閉清除cookie存的token及去調接口

mounted() {
window.addEventListener('beforeunload', e => this.beforeunloadHandler(e))
window.addEventListener('unload', e => this.unloadHandler(e))
},
destroyed() {
window.removeEventListener('beforeunload', e => this.beforeunloadHandler(e))
window.removeEventListener('unload', e => this.unloadHandler(e))
},
methods: {
beforeunloadHandler(){
this._beforeUnload_time=new Date().getTime();
},
unloadHandler(e){
this._gap_time=new Date().getTime()-this._beforeUnload_time;
//判斷是窗口關閉還是刷新
if(this._gap_time<=5){
//如果是登錄狀態，關閉窗口前，移除用戶
cookies.remove('token')
}
}
}