<template>
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<el-button
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@click="topFunction"
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id="topBtn"
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:style="{display: buttonDisplay}"
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>
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<i class="icon-top"></i>
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<div>Top</div>
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</el-button>
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</template>
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<script lang="ts">
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import { Vue, Component } from 'vue-property-decorator';
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@Component
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export default class UiGoToTop extends Vue {
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buttonDisplay = 'none';
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created() {
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if (process.browser) {
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document.body.addEventListener('scroll', this.scrollFunction);
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}
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}
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scrollFunction() {
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if (document.body.scrollTop > 300 || document.documentElement.scrollTop > 300) {
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this.buttonDisplay = "block";
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} else {
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this.buttonDisplay = "none";
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}
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}
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topFunction() {
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document.body.scrollTop = 0;
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document.documentElement.scrollTop = 0;
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}
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destroyed() {
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document.body.removeEventListener('scroll', this.scrollFunction);
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}
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}
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</script>
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<style lang="scss">
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#topBtn {
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display: none;
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position: fixed;
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bottom: 30px;
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right: 20px;
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z-index: 99;
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background-color: #666666;
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color: $PRIMARY_WHITE;
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cursor: pointer;
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width: 68px;
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height: 68px;
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border-radius: 50px;
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border: none;
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transition: width height;
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transition-duration: 0.5s;
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font-size: 16px;
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&:hover,&:focus {
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transform: scale(0.9);
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transition: transform;
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transition-duration: 0.5s;
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background-color: $MID_GREY;
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}
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}
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</style>
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