<div class="bottom" v-show="hideshow"> <div class="btn"> </div> </div> data() { return { docmHeight: document.documentElement.clientHeight ||document.body.clientHeight, showHeight: document.documentElement.clientHeight ||document.body.clientHeight, hideshow:true //显示或者隐藏footer } }, mounted() { //监听事件 window.onresize = ()=>{ return(()=>{ this.showHeight = document.documentElement.clientHeight || document.body.clientHeight; })() } }, beforeDestroy() { window.onresize = () => {} }, watch: { //监听显示高度 showHeight:function() { if(this.docmHeight > this.showHeight){ //隐藏 this.hideshow=false }else{ //显示 this.hideshow=true } } },