vue backtop组件的实现完整代码
程序员文章站
2022-03-27 08:21:08
效果：代码： 
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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