Vue页面返回顶部功能实现

原文：/p/c38c2d129ca0（感谢）

<div class="gotop" v-if="showgo"><button @click="gotop">top</button><button @click="gobottom">bottom</button></div>

data() {return {showgo: false}},mounted() {var vm = this;window.onscroll = function() {if (document.documentElement.scrollTop > 300) {vm.showgo = true;} else {vm.showgo = false;}}}