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vue backtop组件的实现完整代码

2021-04-08 04:06 74 查看 https://www.geek-share.com/det

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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标签:  vue backtop 组件