<template> <div> <ul> <li v-for="(item, key) in 50" :key="key"> {{ item }} </li> </ul> <transition> <p :class="['go', { isFixed: headerFixed }]" v-if="headerFixed"> 吸底按钮 </p> </transition> </div> </template> <script> export default { name: 'test', data() { return { headerFixed: false, } }, mounted() { window.addEventListener('scroll', this.handleScroll) }, destroyed() { window.removeEventListener('scroll', this.handleScroll) }, methods: { handleScroll() { const scrollTop = window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop this.headerFixed = scrollTop > 50 }, }, } </script> <style lang="scss" scoped="scoped"> #test { .list-box { padding-bottom: 50px; } .go { background: pink; text-align: center; line-height: 50px; width: 100%; } .isFixed { position: fixed; bottom: 0; } .fade-enter { opacity: 0; } .fade-enter-active { transition: opacity 0.8s; } .fade-leave-to { opacity: 0; } .fade-leave-active { transition: opacity 0.8s; } } </style>
效果图：
