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问题:

This question already has an answer here:

Why is there an unexplainable gap between these inline-block div elements? 6 answers
How do I remove the space between inline-block elements? 36 answers

I've got the following test page and css. When displayed, there is a 4px gap between each list item. How do I get the items to be next to each other?

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" "http://www.w3.org/TR/html4/frameset.dtd">     

<html>
      <head>
        <link type="text/css" rel="stylesheet" href="/stylesheets/test.css" />
      </head>

      <body>
        <div>
          <ul class="nav">
            <li class="nav"><a class="nav" href="#">One1</a></li>
            <li class="nav"><a class="nav" href="#">Two</a></li>
            <li class="nav"><a class="nav" href="#">Three</a></li>
            <li class="nav"><a class="nav" href="#">Four</a></li>
          </ul>
        </div>
      </body>
    </html>

The css:

ul.nav, ul li.nav {
  display: inline;
  margin: 0px;
  padding: 0px;
}

ul.nav {
  list-style-type: none;
}

li.nav {
  background-color: red;
}

a.nav {
  background-color: green;
  padding: 10px;
  margin: 0px;
}

a:hover.nav {
  background-color: gray;
}

回答1:

You need to use display:block and float:left on the lis to remove the space. When they're inline the browser treats them as words, and so leaves space in between.

Also see my similar question.

回答2:

Combine @Skilldrick and @teedyay and you have your answer and explanation.
If <li>s are treated as words than any white space around them is condensed to one space.

So I guess this is a feature that looks like a bug.

To remove the space either put all your <li>s in a chain with no white space between them.
OR
Reduce the font size on the <ul> to 0 and restore the size on the <li>s

回答3:

You can also set font-size:0 for the <ul> tag.

回答4:

I'm afraid this is dirty too, but I'll be (pleasantly) surprised if there's a clean fix to this.

Put all your <li>s on one line:

<li class="nav"><a class="nav" href="#">One1</a></li><li class="nav"><a class="nav" href="#">Two</a></li><li class="nav"><a class="nav" href="#">Three</a></li><li class="nav"><a class="nav" href="#">Four</a></li>

Sorry.