小编Boo*_*rat的帖子

我正在创建一个很长的 HTML 页面。我对添加一个目录很感兴趣，就像在有角度的材料中一样，但是我在任何地方都找不到任何关于它的文档。这是我正在寻找的目录类型：

Angular 目录( https://imgur.com/3VcXg18 )

我看过一些 npm 替代品，但我对这些不感兴趣。

angular 目录的代码如下：

<table-of-contents container=".mat-drawer-content" _nghost-lwx-c20="" class="ng-star-inserted">
          <!---->
          <div _ngcontent-lwx-c20="" class="docs-toc-container ng-star-inserted">
            <div _ngcontent-lwx-c20="" class="docs-toc-heading">Contents</div>
            <nav _ngcontent-lwx-c20="">
              <!----><a _ngcontent-lwx-c20="" href="/components/datepicker/overview#connecting-a-datepicker-to-an-input"
                class="docs-level-h3 docs-link ng-star-inserted"> Connecting a datepicker to an input </a><a
                _ngcontent-lwx-c20="" href="/components/datepicker/overview#setting-the-calendar-starting-view"
                class="docs-level-h3 docs-link ng-star-inserted"> Setting the calendar starting view </a><a
                _ngcontent-lwx-c20=""
                href="/components/datepicker/overview#watching-the-views-for-changes-on-selected-years-and-months"
                class="docs-level-h4 docs-link ng-star-inserted"> Watching the views for changes on selected years and
                months </a><a _ngcontent-lwx-c20="" href="/components/datepicker/overview#setting-the-selected-date"
                class="docs-level-h3 docs-link ng-star-inserted"> Setting the selected date </a><a _ngcontent-lwx-c20=""
                href="/components/datepicker/overview#changing-the-datepicker-colors"
                class="docs-level-h3 …

编程语言：Scheme / DrRacket

我发现foldr和之间的用法没有区别apply

谁能解释他们的不同之处？据我所知，使用文件夹可以实现与应用相同的功能。谢谢！