| | |
| | | <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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| | | <template slot="title"> |
| | | <slot name="title"></slot> |
| | | </template> |
| | | <template slot="icon"> |
| | | <slot name="icon"></slot> |
| | | </template> |
| | | <template slot="value"> |
| | | <slot name="value"></slot> |
| | | </template> |
| | | <template slot="right-icon"> |
| | | <slot name="right-icon"></slot> |
| | | </template>
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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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| | |
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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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| | |
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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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| | |
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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uni.$u.getRect,二者功能一致,名称不同
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| | | return new Promise(resolve => {
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| | | this.$uGetRect(`#${this.elId}`).then(size => {
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| | | resolve(size)
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| | | })
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| | | })
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| | | // #endif
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| | |
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| | | // #ifdef APP-NVUE
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| | | // nvue下,使用dom模块查询元素高度
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| | | // 返回一个promise,让调用此方法的主体能使用then回调
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| | | return new Promise(resolve => {
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| | | dom.getComponentRect(this.$refs[this.elId], res => {
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| | | resolve(res.size)
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| | | })
|
| | | })
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| | | // #endif
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| | | }
|
| | | },
|
| | | };
|
| | | </script>
|
| | |
|
| | | <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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| | |
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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>
|