问题描述
我正在尝试使用引导程序 5 在 Angular 12 中创建一个 ngFor 下拉手风琴列表。不知何故,手风琴保持打开状态并且无法关闭。
我希望有人知道如何使手风琴能够关闭。
https://getbootstrap.com/docs/5.0/components/accordion/
<div class="accordion">
<div class="accordion-item" *ngFor="let category of cateories; let i = index">
<h2 class="accordion-header" [attr.id]="'heading' + i">
<button class="accordion-button" type="button" data-bs-toggle="collapse"
[attr.data-target]="'#collapse' + i" aria-expanded="true" [attr.aria-controls]="'collapse' + i">
{{ category.title }}
</button>
</h2>
<div [attr.id]="'collapse' + i" class="accordion-collapse collapse show" [attr.aria-labelledby]="'heading' + i"
data-bs-parent="#accordionExample">
<div class="accordion-body">
<ul>
<li *ngFor="let childCategory of category.children">{{ childCategory.title }}</li>
</ul>
</div>
</div>
</div>
</div>
解决方法
不知何故,手风琴保持打开状态,无法关闭。
这是因为您还没有定义任何方法来关闭它。您可能需要配置 JQuery 和 bootstrap 脚本文件……不推荐。
我建议您考虑为此类组件使用库,例如 ngx-accordion
另一种解决方案是简单地硬编码逻辑来关闭和打开手风琴
您可以设置一个属性来跟踪手风琴是否打开。在您的 TS 文件中
openAccordion: boolean[] = []
在你的 html 中
<div class="accordion">
<div class="accordion-item" *ngFor="let category of cateories; let i = index">
<h2 class="accordion-header" [attr.id]="'heading' + i">
<button class="accordion-button" type="button"
(click)='openAccordion[i] = !openAccordion[i]' data-bs-toggle="collapse"
[attr.data-target]="'#collapse' + i" aria-expanded="true" [attr.aria-controls]="'collapse' + i">
{{ category.title }}
</button>
</h2>
<div [attr.id]="'collapse' + i" class="accordion-collapse collapse" [class.show]='openAccordion[i]'
[attr.aria-labelledby]="'heading' + i" data-bs-parent="#accordionExample">
<div class="accordion-body">
<ul>
<li *ngFor="let childCategory of category.children">{{ childCategory.title }}</li>
</ul>
</div>
</div>
</div>
</div>
另一个选项是包含 bootstrap js 文件。下面是如何实现的演示
<div class="accordion" id="accordionContainer">
<div class="accordion-item" *ngFor="let category of cateories; let i = index">
<h2 class="accordion-header" [id]="'heading' + i">
<button class="accordion-button" type="button" data-bs-toggle="collapse" [attr.data-bs-target]="'#collapse' + i" aria-expanded="true" [attr.aria-controls]="'collapse' + i">
{{ category.title }}
</button>
</h2>
<div [id]="'collapse' + i" class="accordion-collapse collapse show" [attr.aria-labelledby]="'heading' + i"
data-bs-parent="#accordionContainer">
<div class="accordion-body">
<ul>
<li *ngFor="let childCategory of category.children">{{ childCategory.title }}</li>
</ul>
</div>
</div>
</div>
</div>