<template>  <section class="fixed-icon"       :style="{ bottom: bottom + 'rem' }"       :class="[ !transition ? 'fixed-transition' : '']"       @click="event">    <slot></slot>  </section></template><script> export default {  name: 'fixedIcon',  props: {   bottom: { // 改圖標距離底部距離 單位 rem    type: Number,    default: 3,   },  },  data () {   return {    transition: true, // 是否觸發動畫    timer: null, // 定時器   };  },  methods: {   event() {    this.$emit('clickEvent'); // 綁定點擊圖表時間   },   handleScroll () { // 每次滑動都會執行函數    this.transition = false;    if (this.timer) { // 判斷是否已存在定時器     clearTimeout(this.timer);    }    this.timer = setTimeout(() => { // 創建定時器，1.4s后圖標回歸原位置     this.transition = true;    }, 1400);   }  },  mounted () {   window.addEventListener('scroll', this.handleScroll); // 監聽頁面滑動  } };</script><style scoped lang="scss">  /*@media only screen and (min-width:750px){html{font-size:20px}} */  .fixed-icon{    position: fixed;    z-index: 1100;    right: 1.7rem;    display: flex;    justify-content: center;    align-items: center;    height: 4.1rem;    width: 4.1rem;    border-radius: 50%;    background-color: rgba(128, 128, 128, 0.8);    transition: 0.7s ease-in-out;  }  .fixed-transition{    right: -2.05rem;    opacity: 0.4;    transition: 1s ease-in-out;  }</style>

<template>  <section class="content">    <fixed-icon :bottom="3" @clickEvent="chat">      <i class="icon-chat"></i>    </fixed-icon>  </section></template><script> import fixedIcon from './components/fixedIcon.vue'; export default {  name: 'test',  components: {   fixedIcon  },  data () {   return {   };  },  methods: {   chat() { // 圖標點擊事件    console.log('你好');   },  },  mounted() {   document.title = 'Vue制作固定定位圖標滑動隱藏效果';  }, };</script><style scoped lang="scss">  .content{    height: 200vh;  }  .icon-chat{    width: 2rem;    height: 1.9rem;    background: url('http://pfpdwbdfy.bkt.clouddn.com/image/test/fixedIconTranstion/wechat.png') no-repeat;    background-size: 2rem 1.9rem;  }</style>