vue封装返回顶部组件cv可用

Posted 2022-09-20 水香木鱼

一、博主介绍

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🔋 充电：相信付出终将会得到回报!

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二、笔芯文章

可直接粘贴走，拿去直接用即可。

(1)、封装BackTop.vue组件

<!--返回顶部组件-->
<template>
  <transition :name="transitionName">
    <div
      v-show="visible"
      :style="customStyle"
      class="back-to-ceiling"
      @click="backToTop"
    >
      <svg
        width="16"
        height="16"
        viewBox="0 0 17 17"
        xmlns="http://www.w3.org/2000/svg"
        class="Icon Icon--backToTopArrow"
        aria-hidden="true"
        style="height: 16px; width: 16px"
      >
        <path
          d="M12.036 15.59a1 1 0 0 1-.997.995H5.032a.996.996 0 0 1-.997-.996V8.584H1.03c-1.1 0-1.36-.633-.578-1.416L7.33.29a1.003 1.003 0 0 1 1.412 0l6.878 6.88c.782.78.523 1.415-.58 1.415h-3.004v7.004z"
        />
      </svg>
    </div>
  </transition>
</template>

<script>
export default 
  name: "BackTop",
  props: 
    visibilityHeight: 
      type: Number,
      default: 400,
    ,
    backPosition: 
      type: Number,
      default: 0,
    ,
    customStyle: 
      type: Object,
      default: function () 
        return 
          right: "50px",
          bottom: "50px",
          width: "40px",
          height: "40px",
          "border-radius": "4px",
          "line-height": "45px",
          background: "#e7eaf1",
        ;
      ,
    ,
    transitionName: 
      type: String,
      default: "fade",
    ,
  ,
  data() 
    return 
      visible: false,
      interval: null,
      isMoving: false,
    ;
  ,
  mounted() 
    window.addEventListener("scroll", this.handleScroll);
  ,
  beforeDestroy() 
    window.removeEventListener("scroll", this.handleScroll);
    if (this.interval) 
      clearInterval(this.interval);
    
  ,
  methods: 
    handleScroll() 
      this.visible = window.pageYOffset > this.visibilityHeight;
    ,
    backToTop() 
      if (this.isMoving) return;
      const start = window.pageYOffset;
      let i = 0;
      this.isMoving = true;
      this.interval = setInterval(() => 
        const next = Math.floor(this.easeInOutQuad(10 * i, start, -start, 500));
        if (next <= this.backPosition) 
          window.scrollTo(0, this.backPosition);
          clearInterval(this.interval);
          this.isMoving = false;
         else 
          window.scrollTo(0, next);
        
        i++;
      , 16.7);
    ,
    easeInOutQuad(t, b, c, d) 
      if ((t /= d / 2) < 1) return (c / 2) * t * t + b;
      return (-c / 2) * (--t * (t - 2) - 1) + b;
    ,
  ,
;
</script>

<style scoped>
.back-to-ceiling 
  position: fixed;
  display: inline-block;
  text-align: center;
  cursor: pointer;


.back-to-ceiling:hover 
  background: #d5dbe7;


.fade-enter-active,
.fade-leave-active 
  transition: opacity 0.5s;


.fade-enter,
.fade-leave-to 
  opacity: 0;


.back-to-ceiling .Icon 
  fill: #245CDC;
  background: none;

</style>

(2)、使用BackTop.vue组件

注意：在数据多的时候会显示出来

<template>
	<div>
		<ul>
			<li>测试文本</li>
			<li>测试文本</li>
			<li>测试文本</li>
			<li>测试文本</li>
			<li>测试文本</li>
		</ul>
		<!-- 返回顶部组件 -->
		<BackTop></BackTop>
	</div>
</template>

<script>
import BackTop from "@/components/BackTop.vue";
export default 
  components: 
    BackTop,
  ,

</script>

三、博主致谢

感谢小伙伴们，耐心的阅读完本篇文章，关注👉 水香木鱼🔔 获取更多精彩文章！

⭐⭐⭐ 做为小可爱的你，别忘记一键三连呦!