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'新增功能：返回顶部'

This commit is contained in:
dongsuo 2017-07-17 15:33:21 +08:00 committed by 花裤衩
parent ba2e486099
commit bf08756644
3 changed files with 238 additions and 1 deletions
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92
src/components/BackToTop/index.vue Normal file
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@ -0,0 +1,92 @@
<template>
<transition name="fade">
<div class="back-to-top" @click="backToTop" v-show="visible">
<el-tooltip class="item" effect="dark" content="返回顶部" placement="top">
<i class="el-icon-arrow-up"></i>
</el-tooltip>
</div>
</transition>
</template>
<script>
export default {
name: 'BackToTop',
props: {
visibilityHeight: {
type: Number,
default: 400
},
backPosition: {
type: Number,
default: 0
}
},
data() {
return {
visible: false
}
},
mounted() {
window.addEventListener('scroll', this.handleScroll)
},
beforeDestroy() {
window.removeEventListener('scroll', this.handleScroll)
},
methods: {
handleScroll() {
this.visible = window.pageYOffset > this.visibilityHeight;
},
backToTop() {
const start = window.pageYOffset;
let i = 0;
const t = setInterval(() => {
const next = Math.floor(this.easeInOutQuad(10 * i, start, -start, 500));
if (next <= this.backPosition) {
window.scrollTo(0, this.backPosition);
clearInterval(t)
} 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-top {
position: fixed;
right: 50px;
bottom: 50px;
display: inline-block;
height: 40px;
width: 40px;
box-shadow: 1px 1px 1px #58B7FF;
text-align: center;
cursor: pointer;
background: #58B7FF;
color: #fff;
}
.fade-enter-active,
.fade-leave-active {
transition: opacity 1s
}
.fade-enter,
.fade-leave-to {
opacity: 0
}
.back-to-top i {
display: inline-block;
width: 100%;
height: 100%;
line-height: 40px;
}
</style>

4
src/router/index.js
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@ -28,6 +28,7 @@ const Sticky = _import('components/sticky');
const SplitPane = _import('components/splitpane'); const SplitPane = _import('components/splitpane');
const CountTo = _import('components/countTo'); const CountTo = _import('components/countTo');
const Mixin = _import('components/mixin'); const Mixin = _import('components/mixin');
const BackToTop = _import('components/backToTop')
/* charts */ /* charts */
const chartIndex = _import('charts/index'); const chartIndex = _import('charts/index');
@ -129,7 +130,8 @@ export const asyncRouterMap = [
{ path: 'dropzone', component: Dropzone, name: 'Dropzone' }, { path: 'dropzone', component: Dropzone, name: 'Dropzone' },
{ path: 'sticky', component: Sticky, name: 'Sticky' }, { path: 'sticky', component: Sticky, name: 'Sticky' },
{ path: 'countto', component: CountTo, name: 'CountTo' }, { path: 'countto', component: CountTo, name: 'CountTo' },
{ path: 'mixin', component: Mixin, name: '小组件' } { path: 'mixin', component: Mixin, name: '小组件' },
{ path: 'backtotop', component: BackToTop, name: '返回顶部' }
] ]
}, },
{ {

143
src/views/components/backToTop.vue Normal file
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@ -0,0 +1,143 @@
<template>
<div class="components-container">
<code>页面滚动到指定位置会在右下角出现返回顶部按钮</code>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<div>我是占位</div>
<back-to-top id="back-to-top-t" :visibilityHeight="300" :backPosition="50"></back-to-top>
</div>
</template>
<script>
import BackToTop from 'components/BackToTop';
export default {
components: { BackToTop }
}
</script>
<style scoped>
#back-to-top-t{
right: 100px;
bottom: 100px;
}
</style>