Em vs Px和跨浏览器兼容性 [英] Em vs Px and cross browser compatibility

问题描述

我是一个CSS新手，并想知道是否有一个好处，使用em而不是px当我的CSS的跨浏览器兼容性。

I'm a CSS newbie and was wondering if there is a benefit using em instead of px when it comes the cross browser compatibility of my CSS.

推荐答案

严格来说，使用em over px不是一个跨浏览器兼容性问题 - 所有浏览器都支持使用

Strictly speaking the use of em over px isn't really a cross-browser compatibility issue - all browsers support the use of them both for font-sizing.

过去，建议避免使用px作为具有最大市场份额的浏览器进行字体大小调整，IE6不允许使用文本调整大小。它将px视为绝对值，而不是像em这样的相对值，因此不会在px中对文本进行缩放。

It used to be advisable to avoid using px for font sizing as the browser with the biggest market share, IE6, wouldn't allow text resizing. It sees px as an absolute value, not a relative value like em, and so wouldn't scale text up or down sized in px.

根据您的受众不需要担心它。关于em的好处有一些很好的信息，以及它们如何帮助在这里建立一个流畅的布局： http：// www。 alistapart.com/articles/fluidgrids/

Depending on your audience you may not need to worry about it. There's some great info on the benefits of the em, and how they can help towards building a fluid layout here: http://www.alistapart.com/articles/fluidgrids/

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