效果：
代码：
<template>
<div class= "back-top" >
<div >
<img src= "imgsrc" class= "line" :class= "isHide? 'isHide': 'isShow'" :style= "{display: (firstShow? 'block': 'none')}" @click= "backTop" >
</div>
</div>
</template>
<script>
export default {
name: "backTop" ,
data(){
return {
firstShow: false , //初始化隐藏组件
isHide: false ,
scrollFLag: true ,
}
},
created() {
document.addEventListener( 'scroll' , () => {
let scroll = document.documentElement.scrollTop
if (scroll > 200){
this .isHide = false
this .firstShow = true
} else {
this .isHide = true
}
})
},
methods: {
backTop(){
if ( this .scrollFLag){
this .scrollFLag = false
//屏幕高度
let scroll = document.documentElement.scrollTop
let scrollTimer = setInterval(()=> {
scroll -= 50
document.documentElement.scrollTop = Math.max(scroll, 0)
if ( scroll <= 0){
clearInterval(scrollTimer)
}
}, 10)
this .scrollFLag = true
}
},
},
}
</script>
<style scoped lang= "scss" >
.back-top{
position: fixed;
top: 0;
right: 10vw;
width: 20px;
height: 500px;
z-index: 200;
.line{
width: 12vw;
height: 100%;
z-index: 20;
cursor: pointer;
opacity: 0.8;
transform: translateY(-100%);
&:hover{
opacity: 1;
}
}
.isShow{
animation: back-top-move 0.5s forwards linear, back-top-yurayura 2s 0.6s forwards linear infinite;
}
.isHide{
animation: back-top-hide 0.5s forwards linear;
}
}
@keyframes back-top-hide {
from {
transform: translateY(0);
}
to {
transform: translateY(-100%);
}
}
@keyframes back-top-move {
to {
transform: translateY(0);
}
}
@keyframes back-top-yurayura {
0%{transform-origin: top center;transform: rotate(0)}
25%{transform-origin: top center;transform: rotate(2deg)}
75%{transform-origin: top center;transform: rotate(-2deg)}
100%{transform-origin: top center;transform: rotate(0)}
}
</style>
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原文链接：https://blog.csdn.net/qq_38292936/article/details/115435384
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