vue 区分窗口关闭或刷新

```

data() {

return:{

_gap_time: 0,

_beforeUnload_time: 0,

}

}

mounted() {

window.addEventListener('beforeunload', e=> this.beforeunloadFn())

window.addEventListener('unload', e=> this.unloadFn())

},

methods: {

unloadFn() {

  this._gap_time = new Date().getTime() - this._beforeUnload_time

  if (this._gap_time <= 5) {

    //关闭窗口

}

},

beforeunloadFn() {

  this._beforeUnload_time = new Date().getTime()

},

},

deactivated() {

  window.removeEventListener('beforeunload', e=> this.beforeunloadFn());

  window.removeEventListener('unload', e=> this.unloadFn());

},

```