1.在data中设置：

1  tableHeight:"500",2  screenHeight:window.innerHeight,

2.在mounted中设置：

1   mounted() {2       const that = this3       window.onresize =()  =>{4         return (()=>{5           window.screenHeight = window.innerHeight6           this.screenHeight = window.screenHeight;7         })()8       }9     },

3.在watch中监听：

1   watch:{2       screenHeight(val){3         this.screenHeight = val4         this.tableHeight = this.screenHeight - 2505       }6     },