fes.js/packages/fes-doc/docs/ui/templates/backTop/2.md

layout
templateLayout

<template>
    <Back-top style="bottom: 100px" :height-to-show="300">
        <div class="self-cls">TOP</div>
    </Back-top>
</template>
<style lang="scss">
.self-cls{
    height: 40px;
    width: 40px;
    line-height: 40px;
    border-radius: 50%;
    text-align: center;
    color: #fff;
    background-color: #5cadff;
}
.self-cls:hover{
    background-color: #3399ff;
}
</style>