Vue中监听窗口关闭事件，并在窗口关闭清除cookie存的token及去调接口

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;
//判断是窗口关闭还是刷新
if(this._gap_time<=5){
//如果是登录状态，关闭窗口前，移除用户
cookies.remove('token')
}
}
}