问题描述

css hover 是否可以在移动设备上使用?我有一个 CSS 悬停类，它在常规网络浏览器上运行良好，但在移动浏览器上不起作用.

Does css hover work on mobile devices? I have a css hover class which works fine on a regular web browser, but doesn't work on mobile browsers.

推荐答案

:hover 伪类需要一个指针(图形输入)设备，能够区分动作 pointing 和选择/激活. 通常在带有触摸界面的移动设备上，您没有前者，只有后者.还有一些笔界面只允许激活，不能指点.

The :hover pseudo-class needs a pointing (graphical input) device, capable of distinguishing the actions pointing and selecting/activating. Usually on mobile devices with a touch interface you don't have the former, only the latter. Also some pen interfaces only allow activating, not pointing.

:hover 伪类在用户指定一个元素(使用一些指针设备)但不激活它时应用.例如，当光标(鼠标指针)悬停在元素生成的框上时，可视用户代理可以应用此伪类.不支持交互式媒体的用户代理不必支持这个伪类.一些支持交互式媒体的符合标准的用户代理可能无法支持此伪类(例如笔设备).

The :hover pseudo-class applies while the user designates an element (with some pointing device), but does not activate it. For example, a visual user agent could apply this pseudo-class when the cursor (mouse pointer) hovers over a box generated by the element. User agents not supporting interactive media do not have to support this pseudo-class. Some conforming user agents supporting interactive media may not be able to support this pseudo-class (e.g., a pen device).

—W3C:CSS 2.1:选择器，动态伪类

所以，回答您的问题:这取决于设备，但可能不会.不要依赖它.随着触摸屏设备的迅速普及，您将失去所有仅指点的事件.

So, to answer your question: It depends on the device but likely no. And don't rely on it. With touch-screen devices quickly gaining in popularity you'll lose the entirety of pointing-only events.

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