大家好，我正在使用 VueJS/Laravel 开发一个过滤器选项，我有一些 (显示更多)/(显示更少)按钮中的问题问题是: 问题 1:首先，通常当您限制项目列表时，它会向您显示(显示更多)按钮 但就我而言，它显示了(显示更少)按钮。 问题 2:你能告诉我这个选项代码是否干净。
<template>
<form>
<div class="row">
<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 === FilterByTopic.FilterByTopicOptions.length ? "See More" : "See Less" }}
</button>
</fieldset>
</div><!-- End row -->
</form>
</template>
<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)"
}
]
}
}
}
methods: {
FilterByTopic_MoreAndLess (limit, total) {
if (this.FilterByTopic_limit_by >= total) {
this.FilterByTopic_limit_by = limit;
} else {
this.FilterByTopic_limit_by += limit;
}
}
}
}
</script>
最佳答案
在我看来，您的 FilterByTopic_limit_by 从值 5 开始，而您的 FilterByTopicOptions.length 从值 21 开始code> 由于它在 data 处初始化的方式，因此它无法进行 FilterByTopic_limit_by === FilterByTopic.FilterByTopicOptions.length 比较。
编辑:
尝试从 FilterByTopic_limit_by === FilterByTopic.FilterByTopicOptions.length 更改测试
到 FilterByTopic.FilterByTopicOptions.length > FilterByTopic_limit_by
关于javascript - (显示更多)/(显示更少)按钮 VueJS 中的问题，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/59910533/