How to style unordered lists in CSS as comma separ

问题:

I’m looking for a way to style an unordered list in XHTML with CSS such that it is rendered inline and the list items are separated by commas.

For example, the following list should be rendered as apple, orange, banana (note the missing comma at the end of the list).

<ul id="taglist">
  <li>apple</li>
  <li>orange</li>
  <li>banana</li>
</ul>

Currently, I’m using the following CSS for styling this list, which almost does what I want, but renders the list as apple, orange, banana, (note the trailing comma after banana).

#taglist {
  display: inline;
  list-style: none;
}

#taglist li {
  display: inline;
}

#taglist li:after {
  content: ", ";
}

Is there a way to solve this problem with pure CSS?

回答1:

To remove the trailing comma, use the :last-child pseudo-class, like so:

#taglist li:last-child:after {
    content: "";
}

回答2:

Replace one your rule

#taglist li:after {
    content: ", ";
}

with just another one

#taglist li + li:before {
    content: ", ";
}

Pros:

• One rule do all the work.
• No rules for cancel previous rule,
• IE8 Support

回答3:

It depends on browser implementation, but this should work. Though it relies on first-child, which may limit its use, but essentially puts the comma-space ", " before the list-item, rather than after. I'm not sure how padding/margins will affect this, but if you use `display: inline; with margins and padding set to zero, it should be okay.

#taglist li:before {content: ", ";}
#taglist first-child {content: ""; } /* empty string */

---

Edited: to respond to corrections offered in comments by Jakob.

The following works (demo page here: http://davidrhysthomas.co.uk/so/liststyles.html:

#taglist    {width: 50%;
        margin: 1em auto;
        padding: 0;
        }

li      {display: inline;
        margin: 0;
        padding: 0;
        }

li:before   {content: ", ";
        }

#taglist li:first-child:before
        {content: "";
        }

Although the commas are strangely floating-in-the-middle-of-nowhere, and, honestly, I prefer the accepted answer anyway. But just so's I wasn't leaving a horribly broken answer lying around, I thought I should fix it.

Thanks, Jakob.

回答4:

It's easy with CSS3 you can use pseudo selector last-child and not at once:

ul#taglist li:not(:last-child):after {
    content: ", ";
}

Check results here https://jsfiddle.net/vpd4bnq1/

回答5:

This is the way that the guys at A List Apart recommend in their article “Taming Lists":

#taglist ul li:after {
    content: ",";
}

#taglist ul li.last:after {
    content: "";
}

This requires having the last item in your list tagged with a class attribute value of “last”:

<ul id="taglist">
  <li>apple</li>
  <li>orange</li>
  <li class="last">banana</li>
</ul>

回答6:

There is no pure css way to do it that's cross-browser compatible ( thanks to Microsoft ). I suggest you just do it with server-side logic.

You can probably get close with using a last class on the last li and using background images for all lis but the last, but you will not be able to do :last-child and content: in IEs.