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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-skeleton">
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<view
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class="u-skeleton__wrapper"
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ref="u-skeleton__wrapper"
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v-if="loading"
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style="display: flex; flex-direction: row;"
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>
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<view
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class="u-skeleton__wrapper__avatar"
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v-if="avatar"
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:class="[`u-skeleton__wrapper__avatar--${avatarShape}`, animate && 'animate']"
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:style="{
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height: $u.addUnit(avatarSize),
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width: $u.addUnit(avatarSize)
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}"
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></view>
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<view
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class="u-skeleton__wrapper__content"
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ref="u-skeleton__wrapper__content"
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style="flex: 1;"
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>
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<view
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class="u-skeleton__wrapper__content__title"
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v-if="title"
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:style="{
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width: uTitleWidth,
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height: $u.addUnit(titleHeight),
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}"
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:class="[animate && 'animate']"
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></view>
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<view
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class="u-skeleton__wrapper__content__rows"
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:class="[animate && 'animate']"
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v-for="(item, index) in rowsArray"
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:key="index"
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:style="{
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width: item.width,
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height: item.height,
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marginTop: item.marginTop
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}"
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>
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</view>
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</view>
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</view>
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<slot v-else />
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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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// 由于weex为阿里的KPI业绩考核的产物，所以不支持百分比单位，这里需要通过dom查询组件的宽度
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const dom = uni.requireNativePlugin('dom')
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const animation = uni.requireNativePlugin('animation')
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// #endif
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/**
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* Skeleton 骨架屏
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* @description 骨架屏一般用于页面在请求远程数据尚未完成时，页面用灰色块预显示本来的页面结构，给用户更好的体验。
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* @tutorial https://www.uviewui.com/components/skeleton.html
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* @property {Boolean} loading 是否显示骨架占位图，设置为false将会展示子组件内容 (默认 true )
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* @property {Boolean} animate 是否开启动画效果 (默认 true )
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* @property {String | Number} rows 段落占位图行数 (默认 0 )
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* @property {String | Number | Array} rowsWidth 段落占位图的宽度，可以为百分比，数值，带单位字符串等，可通过数组传入指定每个段落行的宽度 (默认 '100%' )
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* @property {String | Number | Array} rowsHeight 段落的高度 (默认 18 )
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* @property {Boolean} title 是否展示标题占位图 (默认 true )
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* @property {String | Number} titleWidth 标题的宽度 (默认 '50%' )
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* @property {String | Number} titleHeight 标题的高度 (默认 18 )
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* @property {Boolean} avatar 是否展示头像占位图 (默认 false )
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* @property {String | Number} avatarSize 头像占位图大小 (默认 32 )
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* @property {String} avatarShape 头像占位图的形状，circle-圆形，square-方形 (默认 'circle' )
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* @example <u-search placeholder="日照香炉生紫烟" v-model="keyword"></u-search>
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*/
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export default {
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name: 'u-skeleton',
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mixins: [uni.$u.mpMixin, uni.$u.mixin, props],
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data() {
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return {
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width: 0,
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}
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},
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watch: {
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loading() {
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this.getComponentWidth()
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}
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},
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computed: {
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rowsArray() {
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if (/%$/.test(this.rowsHeight)) {
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uni.$u.error('rowsHeight参数不支持百分比单位')
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}
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const rows = []
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for (let i = 0; i < this.rows; i++) {
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let item = {},
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// 需要预防超出数组边界的情况
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rowWidth = uni.$u.test.array(this.rowsWidth) ? (this.rowsWidth[i] || (i === this.row - 1 ? '70%' : '100%')) : i ===
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this.rows - 1 ? '70%' : this.rowsWidth,
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rowHeight = uni.$u.test.array(this.rowsHeight) ? (this.rowsHeight[i] || '18px') : this.rowsHeight
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// 如果有title占位图，第一个段落占位图的外边距需要大一些，如果没有title占位图，第一个段落占位图则无需外边距
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// 之所以需要这么做，是因为weex的无能，以提升性能为借口不支持css的一些伪类
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item.marginTop = !this.title && i === 0 ? 0 : this.title && i === 0 ? '20px' : '12px'
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// 如果设置的为百分比的宽度，转换为px值，因为nvue不支持百分比单位
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if (/%$/.test(rowWidth)) {
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// 通过parseInt提取出百分比单位中的数值部分，除以100得到百分比的小数值
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item.width = uni.$u.addUnit(this.width * parseInt(rowWidth) / 100)
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} else {
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item.width = uni.$u.addUnit(rowWidth)
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}
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item.height = uni.$u.addUnit(rowHeight)
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rows.push(item)
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}
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// console.log(rows);
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return rows
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},
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uTitleWidth() {
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let tWidth = 0
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if (/%$/.test(this.titleWidth)) {
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// 通过parseInt提取出百分比单位中的数值部分，除以100得到百分比的小数值
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tWidth = uni.$u.addUnit(this.width * parseInt(this.titleWidth) / 100)
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} else {
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tWidth = uni.$u.addUnit(this.titleWidth)
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}
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return uni.$u.addUnit(tWidth)
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},
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},
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mounted() {
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this.init()
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},
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methods: {
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init() {
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this.getComponentWidth()
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// #ifdef APP-NVUE
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this.loading && this.animate && this.setNvueAnimation()
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// #endif
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},
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async setNvueAnimation() {
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// #ifdef APP-NVUE
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// 为了让opacity:1的状态保持一定时间，这里做一个延时
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await uni.$u.sleep(500)
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const skeleton = this.$refs['u-skeleton__wrapper'];
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skeleton && this.loading && this.animate && animation.transition(skeleton, {
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styles: {
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opacity: 0.5
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},
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duration: 600,
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}, () => {
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// 这里无需判断是否loading和开启动画状态，因为最终的状态必须达到opacity: 1，否则可能
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// 会停留在opacity: 0.5的状态中
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animation.transition(skeleton, {
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styles: {
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opacity: 1
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},
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duration: 600,
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}, () => {
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// 只有在loading中时，才执行动画
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this.loading && this.animate && this.setNvueAnimation()
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})
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})
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// #endif
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},
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// 获取组件的宽度
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async getComponentWidth() {
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// 延时一定时间，以获取dom尺寸
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await uni.$u.sleep(20)
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// #ifndef APP-NVUE
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this.$uGetRect('.u-skeleton__wrapper__content').then(size => {
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this.width = size.width
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})
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// #endif
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// #ifdef APP-NVUE
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const ref = this.$refs['u-skeleton__wrapper__content']
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ref && dom.getComponentRect(ref, (res) => {
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this.width = res.size.width
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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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@mixin background {
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/* #ifdef APP-NVUE */
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background-color: #F1F2F4;
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/* #endif */
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/* #ifndef APP-NVUE */
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background: linear-gradient(90deg, #F1F2F4 25%, #e6e6e6 37%, #F1F2F4 50%);
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background-size: 400% 100%;
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/* #endif */
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}
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.u-skeleton {
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flex: 1;
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&__wrapper {
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@include flex(row);
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&__avatar {
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@include background;
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margin-right: 15px;
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&--circle {
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border-radius: 100px;
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}
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&--square {
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border-radius: 4px;
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}
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}
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&__content {
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flex: 1;
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&__rows,
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&__title {
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@include background;
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border-radius: 3px;
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}
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}
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}
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}
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/* #ifndef APP-NVUE */
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.animate {
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animation: skeleton 1.8s ease infinite
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}
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@keyframes skeleton {
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0% {
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background-position: 100% 50%
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}
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100% {
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background-position: 0 50%
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}
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}
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/* #endif */
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</style>
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