twbs--bootstrap/docs/4.1/components/breadcrumb.md

59 lines
2.3 KiB
Markdown
Raw Normal View History

2014-07-12 08:03:13 +00:00
---
layout: docs
2014-07-12 08:03:13 +00:00
title: Breadcrumb
2017-05-28 06:01:14 +00:00
description: Indicate the current page's location within a navigational hierarchy that automatically adds separators via CSS.
group: components
2014-07-12 08:03:13 +00:00
---
2017-09-26 11:50:35 +00:00
## Example
2018-03-14 15:44:38 +00:00
{% capture example %}
<nav aria-label="breadcrumb">
2017-08-26 02:39:13 +00:00
<ol class="breadcrumb">
<li class="breadcrumb-item active" aria-current="page">Home</li>
</ol>
</nav>
<nav aria-label="breadcrumb">
2017-08-26 02:39:13 +00:00
<ol class="breadcrumb">
<li class="breadcrumb-item"><a href="#">Home</a></li>
<li class="breadcrumb-item active" aria-current="page">Library</li>
</ol>
</nav>
<nav aria-label="breadcrumb">
2017-08-26 02:39:13 +00:00
<ol class="breadcrumb">
<li class="breadcrumb-item"><a href="#">Home</a></li>
<li class="breadcrumb-item"><a href="#">Library</a></li>
<li class="breadcrumb-item active" aria-current="page">Data</li>
</ol>
</nav>
2018-03-14 15:44:38 +00:00
{% endcapture %}
{% include example.html content=example %}
2017-08-26 02:39:13 +00:00
## Changing the separator
Separators are automatically added in CSS through [`::before`](https://developer.mozilla.org/en-US/docs/Web/CSS/::before) and [`content`](https://developer.mozilla.org/en-US/docs/Web/CSS/content). They can be changed by changing `$breadcrumb-divider`. The [quote](https://sass-lang.com/documentation/Sass/Script/Functions.html#quote-instance_method) function is needed to generate the quotes around a string, so if you want `>` as seperator, you can use this:
2018-04-11 14:19:25 +00:00
```scss
$breadcrumb-divider: quote(">");
```
It's also possible to use a **base64 embedded SVG icon**:
```scss
$breadcrumb-divider: url(data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI4IiBoZWlnaHQ9IjgiPjxwYXRoIGQ9Ik0yLjUgMEwxIDEuNSAzLjUgNCAxIDYuNSAyLjUgOGw0LTQtNC00eiIgZmlsbD0iY3VycmVudENvbG9yIi8+PC9zdmc+);
```
The separator can be removed by setting `$breadcrumb-divider` to `none`:
```scss
$breadcrumb-divider: none;
```
2017-08-26 02:39:13 +00:00
## Accessibility
Since breadcrumbs provide a navigation, it's a good idea to add a meaningful label such as `aria-label="breadcrumb"` to describe the type of navigation provided in the `<nav>` element, as well as applying an `aria-current="page"` to the last item of the set to indicate that it represents the current page.
For more information, see the [WAI-ARIA Authoring Practices for the breadcrumb pattern](https://www.w3.org/TR/wai-aria-practices/#breadcrumb).