you can wrap everything in your `aside` with a `details` tag to make it collapsible if its too large. you can make it open by default by adding the `open` attribute.
···106107### Sidebar
108109-Optionally, you can add a sidebar to your page for pretty much anything you'd like. A good usage for this could be, for example, complex navigation on a docs website, where you wouldn't be able to fit it all into the header. The sidebar will sort normally with the rest of the content on smaller screens. To make a sidebar, place an `<aside>` tag, and then put an `<article>` inside. You must put it above the `<main>` content. You can have up to two sidebars per page - the second one will appear on the right side. Here's an example:
110111```html
112<aside>
113 <article>
114- <h1>Sidebar</h1>
115- <nav>
116- <ul>
117- <li><a href="https://example.com">Page 1</a></li>
118- <li>
119- <a href="https://example.com">Page 2</a>
120- <ul>
121- <li><a href="https://example.com">Page 2.1</a></li>
122- <li><a href="https://example.com">Page 2.2</a></li>
123- </ul>
124- </li>
125- <li><a href="https://example.com">Page 3</a></li>
126- <li><a href="https://example.com">Page 4</a></li>
127- </ul>
128- </nav>
00129 </article>
130</aside>
131```
···106107### Sidebar
108109+Optionally, you can add a sidebar to your page for pretty much anything you'd like. A good usage for this could be, for example, complex navigation on a docs website, where you wouldn't be able to fit it all into the header. The sidebar will sort normally with the rest of the content on smaller screens. To make a sidebar, place an `<aside>` tag, and then put an `<article>` inside. You must put it above the `<main>` content. You can have up to two sidebars per page - the second one will appear on the right side. You can also make a sidebar collapsible by wrapping it's contents in a `<details>` tag - adding the `open` attribute will make it open by default. Here's an example:
110111```html
112<aside>
113 <article>
114+ <details open>
115+ <summary>Sidebar</summary>
116+ <nav>
117+ <ul>
118+ <li><a href="https://example.com">Page 1</a></li>
119+ <li>
120+ <a href="https://example.com">Page 2</a>
121+ <ul>
122+ <li><a href="https://example.com">Page 2.1</a></li>
123+ <li><a href="https://example.com">Page 2.2</a></li>
124+ </ul>
125+ </li>
126+ <li><a href="https://example.com">Page 3</a></li>
127+ <li><a href="https://example.com">Page 4</a></li>
128+ </ul>
129+ </nav>
130+ </details>
131 </article>
132</aside>
133```