“text-decoration” and the “:after” pseudo-element, revisited

问题

I\'m re-asking this question because its answers didn\'t work in my case.

In my stylesheet for printed media I want to append the url after every link using the :after pseudo-class.

a:after {
    content: \" <\" attr(href) \">\";
    text-decoration: none;
    color: #000000;
}

In Firefox (and probably Chrome but not IE8), text-decoration: none is ignored, and the underline stretches unattractively across the bottom of the url. The color however is correctly set to black for the url. Is there a way to make the text-decoration work?

The original question appended fixed size images instead of variable width text. Its answers use padding and background images to avoid having to use the text-decoration property. I\'m still looking for a solution when the content is variable width text.

回答1:

IE8's implementation of the :before and :after pseudo-elements is incorrect. Firefox, Chrome and Safari all implement it according to the CSS 2.1 specification.

5.12.3 The :before and :after pseudo-elements

The ':before' and ':after' pseudo-elements can be used to insert generated content before or after an element's content. They are explained in the section on generated text.

...

Cascading Style Sheets Level 2 Revision 1 (CSS 2.1) Specification

The specification indicates that the content should be inserted before or after the element's content, not the element (i.e. <element>content:before content content:after</element>). Thus in Firefox and Chrome the text-decoration you're encountering is not on the inserted content but rather on the parent anchor element that contains the inserted content.

I think your options are going to be using the background-image/padding technique suggested in your previous question or possibly wrapping your anchor elements in span elements and applying the pseudo-elements to the span elements instead.

回答2:

If you use display: inline-block on the :after pseudo, the text-decoration declaration will work.

Tested in Chrome 25, Firefox 19

回答3:

I had the same problem and my solution was to set height and overflow:hidden

http://jsfiddle.net/r45L7/

a {
    text-decoration: underline;
}

a:after {
    content: "»";
    display: inline-block;
    text-decoration: none;
    height:16px;
    overflow: hidden;
    padding-left: 10px;
}

It works on IE, FF, Chrome.

回答4:

As an alternative, you can use a bottom border rather than a text-decoration. This assumes that you know the color of the background

a {
  text-decoration: none;
  border-bottom: 1px solid blue;
}
a:after {
  content: "foo";
  border-bottom: 1px solid white; /* same color as the background */
}

回答5:

The only thing that worked for me was declaring a separate repeated selector with the same text-decoration property that it was inheriting from its parent, then in the main selector, setting text-decoration to none.

IE apparently does not know what to do when you set text-decoration: none on a pseudo element without that element having the text-decoration property declared (which by default, it has nothing declared by default). This makes little sense because it is obviously being inherited from the parent, but alas, now we have modern browsers.

span.my-text {
  color: black;
  font-size: 12px;
  text-decoration: underline;
}

span.my-text:after {
  text-decoration: underline; // Have to set text-decoration here so IE knows it can be overwritten below
}

span.my-text:after {
  color: red;
  text-decoration: none; // In the same repeated selector, we can now overwrite text-decoration in our pseudo element.
}

回答6:

What I do is I add a span inside the a element, like this :

<a href="http://foo.bar"><span>link text</span></a>

Then in your CSS file :

a::after{
  content:" <" attr(href) "> ";
  color: #000000;
}

a {
  text-decoration:none;
}

a span {
  text-decoration: underline;
}

回答7:

I realise this isn't answering the question you're asking, but is there a reason you can't use the following (background-based approach):

a.file_pdf {
background-image: url(images/pdf.png);
background-position: center right;
background-repeat: no-repeat;
padding-right: 15px; /* or whatever size your .png image is plus a small margin */
}

As far as I know, the Firefox implementation of :after observes the property of the selector's class, not the psuedo-class. It might be worth experimenting with different doctypes, though? The transitional, rather than strict, sometimes allows for different results (albeit not always better results...).

Edit:

It appears that using

a:after {
    content: " <" attr(href) ">";
    text-decoration: none;
    color: #000000;
    background-color: #fff; /* or whatever colour you prefer */
}

overrides, or at least hides, the text-decoration. This doesn't really provide any kind of answer, but at least offers a workaround of sorts.

回答8:

:after{
    position: absolute;
}

is not perfect, because element content will not wrap

:after{
    display: inline-block;
}

is not perfect, because sometimes we wish after content should always wrap with last word of element content.

For now, I could not find find a perfect solution fits all 3 conditions(1. content could auto-wrap if it's too long 2.after content should wrap with element content, which means after content should not occupy single by it self. 3.text-decoration should only apply on element condition not apply to after content.) I thoughts for now is using other way to mimic text-decoration.

回答9:

You can autoselect links to pdf-files by:

a[href$=".pdf"]:after { content: ... }

IE less than 8 can be enabled to work properly by implementing this link in the head of the html-file:

<!--[if lt IE 8]><script src="http://ie7-js.googlecode.com/svn/version/2.0(beta3)/IE8.js" type="text/javascript"></script><![endif]-->

It works also very good in al IE versions when you use the after-before-content-thing for dosplaying quotation marks.

回答10:

Position the content absolutely as follow:

a {
    position: relative;
    margin: 0 .5em;
    font-weight: bold;
    color: #c00;
}
a:before,
a:after {
    position: absolute;
    color: #000;
}
a:before {
    content: '<';
    left: -.5em;
}
a:after {
    content: '>';
    right: -.5em;
}

This works for me in Firefox 3.6, not tested in any other browsers though, best of luck!

回答11:

Hi I was also having trouble with this as well and happened to stumble across a workaround.

To get around it, I wrapped the URL in div and used something like this.

.next_page:before {
    content: '(';
}

.next_page:after {
    content: ')';
}

来源：https://stackoverflow.com/questions/1238881/text-decoration-and-the-after-pseudo-element-revisited

标签

css

cross-browser

pseudo-element