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使用 uview 重构实际登陆
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YunaiV
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<template>
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<view class="u-collapse-item">
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<u-cell
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:title="title"
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:value="value"
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:label="label"
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:icon="icon"
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:isLink="isLink"
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:clickable="clickable"
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:border="parentData.border && showBorder"
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@click="clickHandler"
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:arrowDirection="expanded ? 'up' : 'down'"
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:disabled="disabled"
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>
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<!-- #ifndef MP-WEIXIN -->
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<!-- 微信小程序不支持，因为微信中不支持 <slot name="title" slot="title" />的写法 -->
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<slot
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name="title"
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slot="title"
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/>
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<slot
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name="icon"
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slot="icon"
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/>
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<slot
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name="value"
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slot="value"
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/>
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<slot
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name="right-icon"
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slot="right-icon"
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/>
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<!-- #endif -->
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</u-cell>
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<view
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class="u-collapse-item__content"
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:animation="animationData"
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ref="animation"
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>
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<view
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class="u-collapse-item__content__text content-class"
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:id="elId"
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:ref="elId"
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><slot /></view>
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</view>
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<u-line v-if="parentData.border"></u-line>
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</view>
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</template>
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<script>
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import props from './props.js';
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// #ifdef APP-NVUE
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const animation = uni.requireNativePlugin('animation')
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const dom = uni.requireNativePlugin('dom')
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// #endif
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/**
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* collapseItem 折叠面板Item
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* @description 通过折叠面板收纳内容区域（搭配u-collapse使用）
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* @tutorial https://www.uviewui.com/components/collapse.html
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* @property {String} title 标题
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* @property {String} value 标题右侧内容
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* @property {String} label 标题下方的描述信息
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* @property {Boolean} disbled 是否禁用折叠面板 ( 默认 false )
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* @property {Boolean} isLink 是否展示右侧箭头并开启点击反馈 ( 默认 true )
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* @property {Boolean} clickable 是否开启点击反馈 ( 默认 true )
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* @property {Boolean} border 是否显示内边框 ( 默认 true )
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* @property {String} align 标题的对齐方式 ( 默认 'left' )
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* @property {String | Number} name 唯一标识符
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* @property {String} icon 标题左侧图片，可为绝对路径的图片或内置图标
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* @event {Function} change 某个item被打开或者收起时触发
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* @example <u-collapse-item :title="item.head" v-for="(item, index) in itemList" :key="index">{{item.body}}</u-collapse-item>
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*/
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export default {
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name: "u-collapse-item",
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mixins: [uni.$u.mpMixin, uni.$u.mixin, props],
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data() {
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return {
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elId: uni.$u.guid(),
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// uni.createAnimation的导出数据
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animationData: {},
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// 是否展开状态
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expanded: false,
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// 根据expanded确定是否显示border，为了控制展开时，cell的下划线更好的显示效果，进行一定时间的延时
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showBorder: false,
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// 是否动画中，如果是则不允许继续触发点击
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animating: false,
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// 父组件u-collapse的参数
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parentData: {
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accordion: false,
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border: false
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}
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};
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},
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watch: {
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expanded(n) {
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clearTimeout(this.timer)
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this.timer = null
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// 这里根据expanded的值来进行一定的延时，是为了cell的下划线更好的显示效果
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this.timer = setTimeout(() => {
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this.showBorder = n
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}, n ? 10 : 290)
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}
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},
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mounted() {
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this.init()
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},
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methods: {
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// 异步获取内容，或者动态修改了内容时，需要重新初始化
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init() {
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// 初始化数据
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this.updateParentData()
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if (!this.parent) {
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return uni.$u.error('u-collapse-item必须要搭配u-collapse组件使用')
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}
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const {
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value,
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accordion,
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children = []
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} = this.parent
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if (accordion) {
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if (uni.$u.test.array(value)) {
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return uni.$u.error('手风琴模式下，u-collapse组件的value参数不能为数组')
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}
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this.expanded = this.name == value
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} else {
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if (!uni.$u.test.array(value) && value !== null) {
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return uni.$u.error('非手风琴模式下，u-collapse组件的value参数必须为数组')
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}
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this.expanded = (value || []).some(item => item == this.name)
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}
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// 设置组件的展开或收起状态
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this.$nextTick(function() {
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this.setContentAnimate()
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})
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},
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updateParentData() {
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// 此方法在mixin中
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this.getParentData('u-collapse')
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},
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async setContentAnimate() {
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// 每次面板打开或者收起时，都查询元素尺寸
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// 好处是，父组件从服务端获取内容后，变更折叠面板后可以获得最新的高度
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const rect = await this.queryRect()
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const height = this.expanded ? rect.height : 0
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this.animating = true
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// #ifdef APP-NVUE
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const ref = this.$refs['animation'].ref
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animation.transition(ref, {
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styles: {
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height: height + 'px'
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},
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duration: this.duration,
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// 必须设置为true，否则会到面板收起或展开时，页面其他元素不会随之调整它们的布局
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needLayout: true,
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timingFunction: 'ease-in-out',
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}, () => {
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this.animating = false
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})
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// #endif
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// #ifndef APP-NVUE
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const animation = uni.createAnimation({
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timingFunction: 'ease-in-out',
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});
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animation
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.height(height)
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.step({
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duration: this.duration,
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})
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.step()
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// 导出动画数据给面板的animationData值
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this.animationData = animation.export()
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// 标识动画结束
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uni.$u.sleep(this.duration).then(() => {
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this.animating = false
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})
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// #endif
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},
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// 点击collapsehead头部
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clickHandler() {
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if (this.disabled && this.animating) return
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// 设置本组件为相反的状态
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this.parent && this.parent.onChange(this)
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},
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// 查询内容高度
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queryRect() {
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// #ifndef APP-NVUE
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// $uGetRect为uView自带的节点查询简化方法，详见文档介绍：https://www.uviewui.com/js/getRect.html
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// 组件内部一般用this.$uGetRect，对外的为this.$u.getRect，二者功能一致，名称不同
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return new Promise(resolve => {
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this.$uGetRect(`#${this.elId}`).then(size => {
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resolve(size)
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})
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})
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// #endif
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// #ifdef APP-NVUE
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// nvue下，使用dom模块查询元素高度
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// 返回一个promise，让调用此方法的主体能使用then回调
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return new Promise(resolve => {
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dom.getComponentRect(this.$refs[this.elId], res => {
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resolve(res.size)
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})
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})
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// #endif
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}
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},
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};
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</script>
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<style lang="scss" scoped>
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@import "../../libs/css/components.scss";
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.u-collapse-item {
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&__content {
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overflow: hidden;
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height: 0;
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&__text {
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padding: 12px 15px;
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color: $u-content-color;
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font-size: 14px;
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line-height: 18px;
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}
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}
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}
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</style>
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