你能阻止 :first-line 样式应用于 :after Opera 和 Chrome 中的元素吗? [英] Can you prevent :first-line styles from applying to :after elements in Opera and Chrome?

问题描述

在 Chrome 和 Opera 中，似乎 :first-line 规则也适用于 :after 伪元素，并且不能被 !important 或普通 CSS 权重覆盖.

例如，我对像这样的 H2 元素有一系列规则(jsfiddle here)

CSS

h2.dotted {位置:相对；字体大小:20px；}h2.dotted.first:第一行{字体大小:30px；}h2.dotted:后{内容: "............................................";字体大小:10px ！重要；位置:绝对；底部:-1em；左:0；宽度:100%；}

HTML

<h2 class="dotted first">这个头部有一个第一行伪元素<br/>它的 :first-line 规则覆盖了它的 :after 规则.</h2><h2 class="dotted">这个头部没有第一行伪元素<br/>并且它的点的大小正确.</h2>

我所期望的(以及在 IE、FF 和 Safari 中发生的情况)是 :after 伪元素的字体大小为 10px.相反，它的字体大小为 30px.有没有办法纠正这种行为?

解决方案

我想出了一个办法:

h2.dotted:before {内容:\A………………";字体大小:10px ！重要；位置:绝对；底部:-1em；左:0；宽度:100%；空白:预；}

\A"是换行的转义字符.并使用 white-space: pre 强制点成为第二行.

小提琴

In Chrome and Opera, it appears that :first-line rules apply to the :after pseudo-element as well, and cannot be overridden with !important or normal CSS weighting.

For example, I have a series of rules on an H2 element like so (jsfiddle here)

CSS

h2.dotted {
    position: relative;
    font-size: 20px;
}
h2.dotted.first:first-line {
    font-size: 30px;
}
h2.dotted:after {
    content: "............................................";
    font-size: 10px !important;
    position: absolute;
    bottom:-1em;
    left: 0;    
    width: 100%;
}

HTML

<h2 class="dotted first">This header has a first-line pseudo-element<br /> 
And its :first-line rules override its :after rules.</h2>
<h2 class="dotted">This header has no first-line pseudo-element<br /> 
And its dots are at the correct size.</h2>

What I would expect (and what happens in IE, FF, and Safari) is that the :after pseudo-element would have a font-size of 10px. Instead, it has a font-size of 30px. Is there a way to correct this behavior?

解决方案

I figured out a way:

h2.dotted:before {
    content: "\A............................................";
    font-size: 10px !important;
    position: absolute;
    bottom:-1em;
    left: 0;    
    width: 100%;
    white-space: pre;
}

The "\A" is the escaped character for a new line. And using white-space: pre forces the dots to be the second line.

fiddle

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