单击以显示更多（按钮）后如何将主题列表限制为 5 个（项目）仅显示 3 个（项目）
[英]How to limit the Topic List to 5 (Items) after clicked to Show more (Button) show only 3 (Items)
问题描述
单击以仅Show more （按钮）后如何将主题列表限制为 5 个（项目）。
还有 3（项目）等到列表的末尾，然后它会向您Show less （按钮）。
例如：在 Udemy 过滤器选项中，当您单击“ See More按钮时，它仅显示5 个项目。
这是我的全部代码：
模板代码
<template>
<div class="modal fade" id="FilterPanelModal" tabindex="-1" role="dialog" aria-labelledby="FilterPanelModalLabel" aria-hidden="true">
<div class="modal-dialog modal-lg modal-dialog-scrollable" role="document">
<div class="modal-content">
<div class="modal-body pb-0">
<form>
<div class="row mb-xl-0 mb-lg-0 mb-3">
<fieldset v-bind:name="FilterByTopic.FilterByTopic_Name"
class="filter-content col-xl-3 col-lg-6 col-md-12 col-sm-12">
<legend class="filter-title">
<i class="fas fa-folder mr-1"></i> {{ FilterByTopic.FilterByTopic_Title }}
</legend>
<div v-for="(Topic, Index) in FilterByTopic.FilterByTopicOptions"
v-bind:key="Topic.id"
class="filter-option-cnt">
<div v-if="Index < FilterByTopic_limit_by"
class="filter-option">
<div class="custom-control custom-checkbox">
<input type="checkbox"
class="custom-control-input"
name="Filter-ByTopic"
v-model="FilterByTopic.FilterByT"
v-bind:id="Topic.Topic_UID"
:value="Topic.Topic_UID"
readonly />
<label class="custom-control-label" :for="Topic.Topic_UID">
{{ Topic.Topic_Name }} <small class="text-muted">{{ Topic.Topic_Count }}</small>
</label>
</div><!-- End custom-control -->
</div><!-- End filter-option -->
</div><!-- End filter-option-cnt -->
<button v-on:click="FilterByTopic_MoreAndLess(FilterByTopic_default_limit, FilterByTopic.FilterByTopicOptions.length)"
type="button"
class="btn btn-link pl-0">
<span v-if="FilterByTopic_limit_by === 5">
<i class="fas fa-plus mr-1"></i>
</span>
<span v-else>
<i class="fas fa-minus mr-1"></i>
</span>
{{ FilterByTopic_limit_by === 5 ? "See More" : "See Less" }}
</button>
</fieldset><!-- End col-xl-3 col-lg-6 col-md-12 col-sm-12 -->
<fieldset v-bind:name="FilterBySubCategory.FilterBySubCategory_Name"
class="filter-content col-xl-3 col-lg-6 col-md-12 col-sm-12">
<legend class="filter-title">
<i class="fas fa-tags mr-1"></i> {{ FilterBySubCategory.FilterBySubCategory_Title }}
</legend>
<div class="filter-option-cnt">
</div><!-- End filter-option-cnt -->
</fieldset><!-- End col-xl-3 col-lg-6 col-md-12 col-sm-12 -->
<fieldset v-bind:name="FilterByLevel.FilterByLevel_Name"
class="filter-content col-xl-3 col-lg-6 col-md-12 col-sm-12">
<legend class="filter-title"><i class="fas fa-level-up-alt mr-1"></i> {{ FilterByLevel.FilterByLevel_Title }}</legend>
</fieldset><!-- End col-xl-3 col-lg-6 col-md-12 col-sm-12 -->
<fieldset v-bind:name="FilterByLanguage.FilterByLanguage_Name"
class="filter-content col-xl-3 col-lg-6 col-md-12 col-sm-12">
<legend class="filter-title"><i class="fas fa-language mr-1"></i> {{ FilterByLanguage.FilterByLanguage_Title }}</legend>
</fieldset><!-- End col-xl-3 col-lg-6 col-md-12 col-sm-12 -->
</div><!-- End row -->
<div class="row">
<fieldset class="filter-content col-xl-3 col-lg-6 col-md-12 col-sm-12">
<legend class="filter-title"><i class="far fa-money-bill-alt mr-1"></i> Price</legend>
</fieldset><!-- End col-xl-3 col-lg-6 col-md-12 col-sm-12 -->
<fieldset class="filter-content col-xl-3 col-lg-6 col-md-12 col-sm-12">
<legend class="filter-title"><i class="far fa-lightbulb mr-1"></i> Features</legend>
</fieldset><!-- End col-xl-3 col-lg-6 col-md-12 col-sm-12 -->
<fieldset class="filter-content col-xl-3 col-lg-6 col-md-12 col-sm-12">
<legend class="filter-title"><i class="fas fa-star mr-1"></i> Ratings</legend>
</fieldset><!-- End col-xl-3 col-lg-6 col-md-12 col-sm-12 -->
<fieldset class="filter-content col-xl-3 col-lg-6 col-md-12 col-sm-12">
<legend class="filter-title"><i class="far fa-calendar-alt mr-1"></i> Duration</legend>
</fieldset><!-- End col-xl-3 col-lg-6 col-md-12 col-sm-12 -->
</div><!-- End row -->
</form>
</div><!-- End modal-body -->
</div><!-- End modal-content -->
</div><!-- End modal-dialog -->
</div><!-- End FilterPanelModal -->
</template>
脚本代码
<script>
export default {
name: 'FilterPanelModal',
data: function() {
return {
// For Filter By Topic
FilterByTopic_default_limit: 5,
FilterByTopic_limit_by: 5,
FilterByTopic: {
FilterByTopic_Title: "Topic",
FilterByTopic_Name: "Topic",
FilterByT: [],
FilterByTopicOptions: [
{
Topic_id: 0,
Topic_UID: "JXETdWWM",
Topic_Name: "Ionic",
Topic_Count: "(0)"
},
{
Topic_id: 1,
Topic_UID: "g2K8SkFA",
Topic_Name: "PHP",
Topic_Count: "(0)"
},
{
Topic_id: 2,
Topic_UID: "P1Q6HOFN",
Topic_Name: "Python",
Topic_Count: "(0)"
},
{
Topic_id: 3,
Topic_UID: "rMzXsrwO",
Topic_Name: "Ruby & Rails",
Topic_Count: "(0)"
},
{
Topic_id: 4,
Topic_UID: "IaMfmedm",
Topic_Name: ".NET / C#",
Topic_Count: "(0)"
},
{
Topic_id: 5,
Topic_UID: "kAqpieja",
Topic_Name: "Java",
Topic_Count: "(0)"
},
{
Topic_id: 6,
Topic_UID: "rUf0AGyV",
Topic_Name: "Perl",
Topic_Count: "(0)"
},
{
Topic_id: 7,
Topic_UID: "znaJ4diW",
Topic_Name: "ColdFusion",
Topic_Count: "(0)"
},
{
Topic_id: 8,
Topic_UID: "uXmoqYpc",
Topic_Name: "JavaScript",
Topic_Count: "(0)"
},
{
Topic_id: 9,
Topic_UID: "daL54tCv",
Topic_Name: "ActionScript",
Topic_Count: "(0)"
},
{
Topic_id: 10,
Topic_UID: "GiXDC0oe",
Topic_Name: "Angular",
Topic_Count: "(0)"
},
{
Topic_id: 11,
Topic_UID: "AvNhruTX",
Topic_Name: "C++",
Topic_Count: "(0)"
},
{
Topic_id: 12,
Topic_UID: "tUxVxhHH",
Topic_Name: "SQL",
Topic_Count: "(0)"
},
{
Topic_id: 13,
Topic_UID: "kfvzVRsH",
Topic_Name: "MySQL",
Topic_Count: "(0)"
},
{
Topic_id: 14,
Topic_UID: "wSeLABXD",
Topic_Name: "MongoDB",
Topic_Count: "(0)"
},
{
Topic_id: 15,
Topic_UID: "SuqxZbEM",
Topic_Name: "Dart",
Topic_Count: "(0)"
},
{
Topic_id: 16,
Topic_UID: "BwAXbUmp",
Topic_Name: "Haskell",
Topic_Count: "(0)"
},
{
Topic_id: 17,
Topic_UID: "cHSjfDKs",
Topic_Name: "Kotlin",
Topic_Count: "(0)"
},
{
Topic_id: 18,
Topic_UID: "PEpWCdtF",
Topic_Name: "Ruby",
Topic_Count: "(0)"
},
{
Topic_id: 19,
Topic_UID: "RWMKGkCj",
Topic_Name: "NodeJS",
Topic_Count: "(0)"
},
{
Topic_id: 20,
Topic_UID: "NqHzgDWS",
Topic_Name: "Wordpress",
Topic_Count: "(0)"
}
]
}, // End Filter By Topic
// For Filter By SubCategory
FilterBySubCategory: {
FilterBySubCategory_Title: "Subcategory",
FilterBySubCategory_Name: "Subcategory",
FilterBySubCat: [],
FilterBySubCategoryOptions: []
},
// End Filter By SubCategory
// For Filter By Level
FilterByLevel: {
FilterByLevel_Title: "Level",
FilterByLevel_Name: "Level",
FilterByLv: [],
FilterByLevelOptions: []
},
// End Filter By Level
// For Filter By Language
FilterByLanguage: {
FilterByLanguage_Title: "Language",
FilterByLanguage_Name: "Language",
FilterByLang: [],
FilterByLanguageOptions: []
}
// End Filter By Language
}
},
computed: {
},
methods: {
FilterByTopic_MoreAndLess (FilterByTopic_default_limit, filters_length) {
this.FilterByTopic_limit_by = (this.FilterByTopic_limit_by === FilterByTopic_default_limit) ? filters_length : FilterByTopic_default_limit;
}
}
}
</script>
1 个解决方案
解决方案1
0 已采纳 2020-01-25 12:55:29
FilterByTopic_MoreAndLess 函数是错误的，这里你要做的是增加显示的主题数，直到显示所有主题，然后返回初始状态。
FilterByTopic_MoreAndLess (limit, total) {
if(this.FilterByTopic_limit_by >= total)
this.FilterByTopic_limit_by = limit;
else
this.FilterByTopic_limit_by += limit;
}
现在只需更改按钮标签的条件。
{{ FilterByTopic_limit_by === FilterByTopic.FilterByTopicOptions.length ? "See More" : "See Less" }}
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