beforeDestroy的使用

beforeDestroy ---实例销毁之前调用
需求是这样的:
important:下面截图数据都是测试数据

日期在我点击查询的时候要存储,刷新就读内存,但是我点击其他页面再进来的时候,这个内存要清空
1.现在查询时存储数据

   search(){
      let time = { 
        start: this.formSearch.beginSearchTime,
        end: this.formSearch.endSearchTime,
        timeRange: this.formSearch.timeRange,
        page: this.formSearch.page
      }
      localStorage.setItem('initTime',JSON.stringify(time))
    }

2.在created里面去获取数据

 created () {  
    let searchCarTime = JSON.parse(localStorage.getItem('initTime'))
    if (searchCarTime) {
      this.formSearch.beginSearchTime = searchCarTime.start
      this.formSearch.endSearchTime = searchCarTime.end,
      this.formSearch.timeRange = searchCarTime.timeRange 
      this.formSearch.page = searchCarTime.page 
    }
  },

3.实例销毁之前调用

  beforeDestroy(){
    localStorage.removeItem('initTime')
  }