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css/docs/content/components/dropdown.md
2021-02-26 20:30:06 +09:00

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Markdown

---
title: Dropdown
status: New
---
Dropdowns are lightweight context menus for housing navigation and actions. They're great for instances where you don't need the full power (and code) of the select menu.
## Basic examples
Dropdowns should be triggered by a `<button>`. **[Each dropdown menu requires a directional class](#alignment)**, much like our tooltips.
Using a GitHub button:
```html live
<div style="margin-bottom: 100px">
<details class="dropdown details-reset details-overlay d-inline-block">
<summary class="btn" aria-haspopup="true">
Dropdown
<div class="dropdown-caret"></div>
</summary>
<ul class="dropdown-menu dropdown-menu-se">
<li><a class="dropdown-item" href="#url">Dropdown item</a></li>
<li><a class="dropdown-item" href="#url">Dropdown item</a></li>
<li><a class="dropdown-item" href="#url">Dropdown item</a></li>
</ul>
</details>
</div>
```
Using a button customized with additional utilities:
```html live
<div style="margin-bottom: 100px">
<details class="dropdown details-reset details-overlay d-inline-block">
<summary class="text-gray p-2 d-inline" aria-haspopup="true">
Dropdown
<div class="dropdown-caret"></div>
</summary>
<ul class="dropdown-menu dropdown-menu-se">
<li><a class="dropdown-item" href="#url">Dropdown item</a></li>
<li><a class="dropdown-item" href="#url">Dropdown item</a></li>
<li><a class="dropdown-item" href="#url">Dropdown item</a></li>
</ul>
</details>
</div>
```
## Options
### Alignment
Align the direction of dropdown menus and their arrows with modifier classes.
```html live
<div style="margin-top: 100px">
<details class="dropdown details-reset details-overlay d-inline-block">
<summary class="btn" aria-haspopup="true">
.dropdown-ne
<div class="dropdown-caret"></div>
</summary>
<ul class="dropdown-menu dropdown-menu-ne">
<li><a class="dropdown-item" href="#url">Dropdown item</a></li>
<li><a class="dropdown-item" href="#url">Dropdown item</a></li>
<li><a class="dropdown-item" href="#url">Dropdown item</a></li>
</ul>
</details>
</div>
```
```html live
<div style="margin-bottom: 100px">
<details class="dropdown details-reset details-overlay d-inline-block">
<summary class="btn" aria-haspopup="true">
.dropdown-e
<div class="dropdown-caret"></div>
</summary>
<ul class="dropdown-menu dropdown-menu-e">
<li><a class="dropdown-item" href="#url">Dropdown item</a></li>
<li><a class="dropdown-item" href="#url">Dropdown item</a></li>
<li><a class="dropdown-item" href="#url">Dropdown item</a></li>
</ul>
</details>
</div>
```
```html live
<div style="margin-bottom: 100px">
<details class="dropdown details-reset details-overlay d-inline-block">
<summary class="btn" aria-haspopup="true">
.dropdown-se
<div class="dropdown-caret"></div>
</summary>
<ul class="dropdown-menu dropdown-menu-se">
<li><a class="dropdown-item" href="#url">Dropdown item</a></li>
<li><a class="dropdown-item" href="#url">Dropdown item</a></li>
<li><a class="dropdown-item" href="#url">Dropdown item</a></li>
</ul>
</details>
</div>
```
```html live
<div style="margin-bottom: 100px" class="d-flex flex-justify-center">
<details class="dropdown details-reset details-overlay d-inline-block">
<summary class="btn" aria-haspopup="true">
.dropdown-s
<div class="dropdown-caret"></div>
</summary>
<ul class="dropdown-menu dropdown-menu-s">
<li><a class="dropdown-item" href="#url">Dropdown item</a></li>
<li><a class="dropdown-item" href="#url">Dropdown item</a></li>
<li><a class="dropdown-item" href="#url">Dropdown item</a></li>
</ul>
</details>
</div>
```
```html live
<div style="margin-bottom: 100px" class="d-flex flex-justify-end">
<details class="dropdown details-reset details-overlay d-inline-block">
<summary class="btn" aria-haspopup="true">
.dropdown-sw
<div class="dropdown-caret"></div>
</summary>
<ul class="dropdown-menu dropdown-menu-sw">
<li><a class="dropdown-item" href="#url">Dropdown item</a></li>
<li><a class="dropdown-item" href="#url">Dropdown item</a></li>
<li><a class="dropdown-item" href="#url">Dropdown item</a></li>
</ul>
</details>
</div>
```
```html live
<div style="margin-bottom: 100px" class="d-flex flex-justify-end">
<details class="dropdown details-reset details-overlay d-inline-block">
<summary class="btn" aria-haspopup="true">
.dropdown-w
<div class="dropdown-caret"></div>
</summary>
<ul class="dropdown-menu dropdown-menu-w">
<li><a class="dropdown-item" href="#url">Dropdown item</a></li>
<li><a class="dropdown-item" href="#url">Dropdown item</a></li>
<li><a class="dropdown-item" href="#url">Dropdown item</a></li>
</ul>
</details>
</div>
```
### Dividers
```html live
<div style="margin-bottom: 170px">
<details class="dropdown details-reset details-overlay d-inline-block">
<summary class="btn" aria-haspopup="true">
Dropdown
<div class="dropdown-caret"></div>
</summary>
<ul class="dropdown-menu dropdown-menu-se">
<li><a class="dropdown-item" href="#url">Dropdown item</a></li>
<li><a class="dropdown-item" href="#url">Dropdown item</a></li>
<li><a class="dropdown-item" href="#url">Dropdown item</a></li>
<li class="dropdown-divider" role="separator"></li>
<li><a class="dropdown-item" href="#url">Another item</a></li>
<li><a class="dropdown-item" href="#url">One more</a></li>
</ul>
</details>
</div>
```
### Headers
```html live
<div style="margin-bottom: 126px">
<details class="dropdown details-reset details-overlay d-inline-block">
<summary class="btn" aria-haspopup="true">
Dropdown
<div class="dropdown-caret"></div>
</summary>
<div class="dropdown-menu dropdown-menu-se">
<div class="dropdown-header">
Dropdown header
</div>
<ul>
<li><a class="dropdown-item" href="#url">Dropdown item</a></li>
<li><a class="dropdown-item" href="#url">Dropdown item</a></li>
<li><a class="dropdown-item" href="#url">Dropdown item</a></li>
</ul>
</div>
</details>
</div>
```