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| <template>
| <div :class="classes" :style="styles" @click="back">
| <slot>
| <div :class="innerClasses">
| <i class="ivu-icon ivu-icon-ios-arrow-up"></i>
| </div>
| </slot>
| </div>
| </template>
| <script>
| import { scrollTop } from '../../utils/assist';
| import { on, off } from '../../utils/dom';
| const prefixCls = 'ivu-back-top';
|
| export default {
| props: {
| height: {
| type: Number,
| default: 400
| },
| bottom: {
| type: Number,
| default: 30
| },
| right: {
| type: Number,
| default: 30
| },
| duration: {
| type: Number,
| default: 1000
| }
| },
| data () {
| return {
| backTop: false
| };
| },
| mounted () {
| // window.addEventListener('scroll', this.handleScroll, false);
| // window.addEventListener('resize', this.handleScroll, false);
| on(window, 'scroll', this.handleScroll);
| on(window, 'resize', this.handleScroll);
| },
| beforeDestroy () {
| // window.removeEventListener('scroll', this.handleScroll, false);
| // window.removeEventListener('resize', this.handleScroll, false);
| off(window, 'scroll', this.handleScroll);
| off(window, 'resize', this.handleScroll);
| },
| computed: {
| classes () {
| return [
| `${prefixCls}`,
| {
| [`${prefixCls}-show`]: this.backTop
| }
| ];
| },
| styles () {
| return {
| bottom: `${this.bottom}px`,
| right: `${this.right}px`
| };
| },
| innerClasses () {
| return `${prefixCls}-inner`;
| }
| },
| methods: {
| handleScroll () {
| this.backTop = window.pageYOffset >= this.height;
| },
| back () {
| const sTop = document.documentElement.scrollTop || document.body.scrollTop;
| scrollTop(window, sTop, 0, this.duration);
| this.$emit('on-click');
| }
| }
| };
| </script>
|
|
