<template>
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<view
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class="w-select"
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id="wSelect"
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:style="{
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'--select-wrap-width': width,
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'--select-wrap-height': height,
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'--select-bg-color': bgColor
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}"
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>
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<view
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:class="isShow ? 'select-wrap-active' : ''"
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class="select-wrap"
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@click="changeShow"
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>
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<view v-if="multiple" class="select-content">
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<view
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class="select-content-item-default"
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v-if="multiSelectList.length === 0"
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>
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{{ defaultValue }}
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</view>
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<view
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class="select-content-item"
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v-if="multiSelectList.length > 0"
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>
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{{ multiSelectList[0][valueName] }}
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</view>
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<view
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class="select-content-item"
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v-if="multiSelectList.length > 1"
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>
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{{ multiLength }}
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</view>
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</view>
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<input
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v-if="!multiple || filterable"
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type="text"
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@input="inputChange"
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:placeholder="defaultValue"
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:disabled="!filterable"
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v-model="inputData"
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/>
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<view
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@click.stop="refreshValue"
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class="close-icon"
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v-if="showClose && value.length > 0"
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>
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<image :src="refreshUrl" mode=""></image>
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</view>
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<view
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v-if="value.length <= 0 || !showClose"
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:class="isShow ? 'w-select-arrow-up' : ''"
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class="w-select-arrow "
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/>
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<scroll-view
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scroll-y
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v-show="optionsShow"
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:class="[
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isShow
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? showPosition === 'bottom'
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? 'animation-bottom-in'
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: 'animation-top-in'
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: showPosition === 'bottom'
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? 'animation-bottom-out'
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: 'animation-top-out',
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showPosition === 'bottom'
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? 'position-bottom'
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: 'position-top'
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]"
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class="select-options"
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>
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<view
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@click.stop="handleClickItem(item)"
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:class="
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multiple &&
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multiSelectList.find(
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res => res[keyName] === item[keyName]
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)
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? 'item-active'
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: value === item[keyName]
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? 'item-active'
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: ''
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"
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v-for="item in filterList"
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class="select-option-item"
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>
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{{ item[valueName] }}
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</view>
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<view
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class="options-no-data"
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v-if="filterList.length < 1"
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>
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无匹配数据~
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</view>
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</scroll-view>
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</view>
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<view
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v-if="isShow"
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@click="closeContentSelect"
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class="contentMask"
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></view>
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</view>
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</template>
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<script>
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export default {
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props: {
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width: {
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type: String,
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default: '140px'
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},
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height: {
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type: String,
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default: '40px'
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},
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bgColor: {
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type: String,
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default: '#fff'
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},
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//是否多选
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multiple: {
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type: Boolean,
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default: false
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},
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//是否可搜索
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filterable: {
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type: Boolean,
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default: false
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},
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//是否显示关闭按钮
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showClose: {
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type: Boolean,
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default: false
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},
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//渲染列表
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list: {
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type: Array,
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default: () => [],
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required: true
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},
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//双向绑定的值
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value: {
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type: [Array, String, Number],
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default: ''
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},
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//默认显示的内容
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defaultValue: {
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type: String,
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default: '请选择'
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},
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//显示的内容
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valueName: {
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type: String,
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default: 'label',
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required: true
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},
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// 绑定的内容
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keyName: {
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type: String,
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default: 'value',
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required: true
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}
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},
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watch: {
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list: {
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immediate: true,
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deep: true,
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handler(news) {
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this.filterList = news
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const findItem = news.find(
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item => item[this.keyName] === this.value
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)
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if (findItem) {
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this.inputData = findItem[this.valueName]
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}
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}
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}
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},
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computed: {
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multiLength() {
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const length = this.multiSelectList.length - 1
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return '+' + length
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},
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bottomDistance() {
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return (
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this.windowHeight -
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this.distanceTop -
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this.curHeight
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) // 当前元素距离可视屏幕底部的距离
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}
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},
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data() {
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return {
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inputData: '',
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multiSelectList: this.multiple ? this.value : [],
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isShow: false,
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optionsShow: false,
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windowHeight: null,
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curHeight: null,
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distanceTop: null,
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showPosition: 'bottom',
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filterList: [],
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refreshUrl:
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'data:image/svg+xml;base64,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'
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}
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},
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mounted() {
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this.$nextTick(() => {
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const res = uni.getSystemInfoSync()
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this.windowHeight = res.windowHeight // 当前设备屏幕高度
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uni
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.createSelectorQuery()
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.in(this)
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.select('#wSelect')
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.boundingClientRect(data => {
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console.log(data.top)
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this.distanceTop = data.top // 当前元素距离顶部的距离
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this.curHeight = data.height
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})
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.exec()
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})
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},
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methods: {
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showPositon() {
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this.showPosition = 'bottom'
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if (this.bottomDistance < this.windowHeight / 3) {
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this.showPosition = 'top'
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}
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},
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changeShow() {
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this.isShow = !this.isShow
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if (this.isShow === false) {
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this.filterList = this.list
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setTimeout(() => {
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this.optionsShow = false
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}, 200)
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} else {
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this.showPositon()
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this.optionsShow = this.isShow
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}
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},
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closeContentSelect() {
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this.isShow = false
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setTimeout(() => {
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this.optionsShow = false
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}, 200)
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},
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inputChange(e) {
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const value = e.detail.value
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this.$emit('input', value)
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this.filterList = this.list.filter(item =>
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item[this.valueName].includes(value)
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)
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},
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refreshValue() {
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this.$emit('input', '')
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this.inputData = ''
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this.$emit('change', '')
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this.filterList = this.list
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if (this.multiple) {
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this.multiSelectList = []
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}
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},
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handleClickItem(e) {
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if (this.multiple) {
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this.multiSelect(e)
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} else {
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this.$emit('input', e[this.keyName])
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this.inputData = e[this.valueName]
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this.$emit('change', e)
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this.changeShow()
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}
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},
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multiSelect(item) {
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let index = this.multiSelectList.findIndex(
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res => res[this.valueName] === item[this.valueName]
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)
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if (index > -1) {
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this.multiSelectList.splice(index, 1)
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} else {
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this.multiSelectList.push(item)
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}
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this.inputData = ''
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this.filterList = this.list
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this.$emit('input', this.multiSelectList)
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this.$emit('change', item)
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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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.w-select {
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--select-wrap-width: 200px;
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--select-wrap-height: 30px;
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--select-border-radius: 4px;
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--select-border: 1px solid #dcdfe6;
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--select-active-border: 1px solid #409eff;
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--select-options-max-height: 150px;
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--select-option-item-font-size: 14px;
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--select-input-font-size: 14px;
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--no-data-default-color: #999999;
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--select-options-box-shadow: 0px 0px 12px
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rgba(0, 0, 0, 0.12);
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--select-bg-color: #fff;
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.select-wrap {
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position: relative;
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width: var(--select-wrap-width);
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height: var(--select-wrap-height);
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border-radius: var(--select-border-radius);
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transition: all 0.2s;
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border: var(--select-border);
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background-color: var(--select-bg-color);
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display: flex;
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justify-content: space-between;
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align-items: center;
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input {
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flex: 1;
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min-width: 0;
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width: 100%;
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height: 100%;
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padding: 0 2px;
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font-size: var(--select-input-font-size);
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}
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.select-content {
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font-size: var(--select-option-item-font-size);
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display: flex;
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align-items: center;
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.select-content-item {
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background-color: #f4f4f5;
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border-radius: var(--select-border-radius);
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color: #aa93b1;
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margin-left: 5px;
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padding: 2px 6px;
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}
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.select-content-item-default {
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color: var(--no-data-default-color);
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margin-left: 5px;
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}
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}
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.close-icon {
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width: 15px;
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height: 15px;
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position: absolute;
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right: 7px;
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top: 50%;
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z-index: 1000;
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transform: translateY(-50%);
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image {
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width: 100%;
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height: 100%;
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}
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}
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.position-bottom {
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top: calc(var(--select-wrap-height) + 10px);
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}
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.position-top {
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bottom: calc(var(--select-wrap-height) + 10px);
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}
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.select-options {
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position: absolute;
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left: 0;
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right: 0;
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border-radius: var(--select-border-radius);
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background-color: var(--select-bg-color);
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box-shadow: var(--select-options-box-shadow);
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z-index: 999;
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max-height: var(--select-options-max-height);
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overflow: scroll;
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padding: 10px;
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.select-option-item {
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transition: background-color 0.2s;
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padding: 5px;
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font-size: var(--select-option-item-font-size);
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margin-bottom: 5px;
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}
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.item-active {
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background-color: #f5f7fa;
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color: #409eff;
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font-weight: 700;
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}
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.options-no-data {
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color: var(--no-data-default-color);
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text-align: center;
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font-size: var(--select-option-item-font-size);
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}
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}
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.w-select-arrow {
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transition: all 0.3s;
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border-left: 1px solid #999999;
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border-bottom: 1px solid #999999;
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height: 8px;
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width: 8px;
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margin: 3px 10px 0;
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transform: translateY(-50%) rotate(-45deg);
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-webkit-transform: translateY(-50%) rotate(-45deg);
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border-right: 1px solid transparent;
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border-top: 1px solid transparent;
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display: inline-block;
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}
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.w-select-arrow-up {
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transform: rotate(-225deg);
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}
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}
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.select-wrap-active {
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border: var(--select-active-border);
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}
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.animation-bottom-in {
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animation-name: bottom-in;
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animation-duration: 0.4s;
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animation-timing-function: ease-out;
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animation-fill-mode: both;
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}
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.animation-bottom-out {
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animation-name: bottom-out;
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animation-duration: 0.2s;
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animation-timing-function: ease-out;
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animation-fill-mode: both;
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}
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.animation-top-in {
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animation-name: top-in;
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animation-duration: 0.4s;
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animation-timing-function: ease-out;
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animation-fill-mode: both;
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}
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.animation-top-out {
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animation-name: top-out;
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animation-duration: 0.2s;
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animation-timing-function: ease-out;
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animation-fill-mode: both;
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}
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@keyframes bottom-in {
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0% {
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opacity: 0;
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transform: translateY(-15%);
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}
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100% {
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opacity: 1;
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transform: translateY(0);
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}
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}
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@keyframes bottom-out {
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0% {
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opacity: 1;
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transform: translateY(0);
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}
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100% {
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opacity: 0;
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transform: translateY(-20%);
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}
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}
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@keyframes top-in {
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0% {
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opacity: 0;
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transform: translateY(15%);
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}
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100% {
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opacity: 1;
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transform: translateY(0);
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}
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}
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@keyframes top-out {
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0% {
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opacity: 1;
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transform: translateY(0);
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}
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100% {
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opacity: 0;
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transform: translateY(20%);
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}
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}
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.contentMask {
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position: fixed;
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left: 0;
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top: 0;
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bottom: 0;
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right: 0;
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width: 100%;
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height: 100%;
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z-index: 998;
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}
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}
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</style>
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