面包屑导航

面包屑导航通过提供返回起始页面的面包屑轨迹，帮助用户了解他们在网站中所处的位置。

Links displayed inline with separators

要求

这些项通常以内联方式显示，并带有分隔符，以指示各个页面之间的层次结构。

Recipe

下载此节的示例

做出的选择

这种模式使用一个简单的 flex 布局摆布，展示了一行 CSS 如何为我们提供导航。分隔符是由 CSS 内容生成属性添加的，你也可以将其换成其他想要的分隔符（样式）。

无障碍访问问题

我使用了 aria-label 和 aria-current 属性来帮助用户理解这个导航的结构，以及当前页面在结构中的位置。详情请参见相关链接。

浏览器兼容性

不同的布局方法，在各种浏览器上的支持情况也不尽相同。有关所使用属性的基本支持的详细信息，请参见下面的图表。

Flexbox

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`flex`	Chrome Full support 29 Full support 29 Full support 21 Prefixed Prefixed Implemented with the vendor prefix: -webkit-	Edge Full support 12 Full support 12 Full support 12 Prefixed Prefixed Implemented with the vendor prefix: -webkit-	Firefox Full support 20 Notes Full support 20 Notes Notes Since Firefox 28, multi-line flexbox is supported. Notes Before Firefox 32, Firefox wasn't able to animate values starting or stopping at `0`. Notes Until Firefox 61, flex items that are sized according to their content are sized using `fit-content`, not `max-content`. No support 18 — 28 Disabled Disabled From version 18 until version 28 (exclusive): this feature is behind the `layout.css.flexbox.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config. Full support 49 Prefixed Prefixed Implemented with the vendor prefix: -webkit- Full support 48 Prefixed Disabled Prefixed Implemented with the vendor prefix: -webkit- Disabled From version 48: this feature is behind the `layout.css.prefixes.webkit` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE Full support 11 Notes Full support 11 Notes Notes Internet Explorer 11 ignores uses of `calc()` in the `flex-basis` part of the `flex` syntax. This can be worked around by using the longhand properties instead of the shorthand. See Flexbug #8 for more info. Notes Internet Explorer 11 considers a unitless value in the `flex-basis` part to be syntactically invalid (and will thus be ignored). A workaround is to always include a unit in the `flex-basis` part of the `flex` shorthand value. See Flexbug #4 for more info. Full support 10 Prefixed Notes Prefixed Implemented with the vendor prefix: -ms- Notes Internet Explorer 10 and 11 ignore uses of `calc()` in the `flex-basis` part of the `flex` syntax. This can be worked around by using the longhand properties instead of the shorthand. See Flexbug #8 for more info. Notes Internet Explorer 10 and 11 consider a unitless value in the `flex-basis` part to be syntactically invalid (and will thus be ignored). A workaround is to always include a unit in the `flex-basis` part of the `flex` shorthand value. See Flexbug #4 for more info.	Opera Full support 12.1	Safari Full support 9 Full support 9 Full support 6.1 Prefixed Prefixed Implemented with the vendor prefix: -webkit-	WebView Android Full support 4.4 Full support 4.4 Full support ≤37 Prefixed Prefixed Implemented with the vendor prefix: -webkit-	Chrome Android Full support 29 Full support 29 Full support 25 Prefixed Prefixed Implemented with the vendor prefix: -webkit-	Firefox Android Full support 20 Notes Full support 20 Notes Notes Since Firefox 28, multi-line flexbox is supported. Notes Before Firefox 32, Firefox wasn't able to animate values starting or stopping at `0`. Notes Until Firefox 61, flex items that are sized according to their content are sized using fit-content, not max-content. No support 18 — 28 Disabled Disabled From version 18 until version 28 (exclusive): this feature is behind the `layout.css.flexbox.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config. Full support 49 Prefixed Prefixed Implemented with the vendor prefix: -webkit- Full support 48 Prefixed Disabled Prefixed Implemented with the vendor prefix: -webkit- Disabled From version 48: this feature is behind the `layout.css.prefixes.webkit` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	Opera Android Full support 12.1	Safari iOS Full support 9 Full support 9 Full support 7 Prefixed Prefixed Implemented with the vendor prefix: -webkit-	Samsung Internet Android Full support 2.0 Full support 2.0 Full support 1.5 Prefixed Prefixed Implemented with the vendor prefix: -webkit-

Legend

Full support: Full support
See implementation notes.: See implementation notes.
User must explicitly enable this feature.: User must explicitly enable this feature.
Requires a vendor prefix or different name for use.: Requires a vendor prefix or different name for use.

要求