blocks|key|4039599|text|你能这样做吗？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4039600|<ul>
+++<li>apple</li>
+++<li><span+class="highlight">orange</span></li>
+++<li>pear</li>
</ul>|code-block|syntax|javascript|4039601|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

<p>Can you do it like this?</p>

<pre><code>&lt;ul&gt;
   &lt;li&gt;apple&lt;/li&gt;
   &lt;li&gt;&lt;span class="highlight"&gt;orange&lt;/span&gt;&lt;/li&gt;
   &lt;li&gt;pear&lt;/li&gt;
&lt;/ul&gt;
</code></pre>


blocks|key|849702|text|添加ul+{float:+left;+}样式会强制你的列表变成你想要的宽度。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|849703|问题是，你应该确保下一个元素放在列表的下面，就像之前一样。清算应该会解决这个问题。|849704|entityMap^0|2|I|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|M|8|@]|D|@]|E|$]]|$1|H|3|-4|5|6|7|N|8|@]|D|@]|E|$]]]|I|$]]

<p>Adding <code>ul {float: left; }</code> style will force your list into preferred width, which is what you want.</p>

<p>Problem is, you should make sure next element goes below the list, as it did before. Clearing should take care of that.</p>


blocks|key|4039734|text|将style="float:+left;"添加到ul将导致ul仅与最宽的项目一样宽。但是，下一个元素将放在它的右侧。向下一个元素添加style="clear:+left;"将把下一个元素放在ul之后。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4039735|Try+it+out|4039736|请参阅float和clear上的documentation。|4039737|entityMap|0|LINK|mutability|MUTABLE|url|http://jsfiddle.net/w07hn13s/|1|http://www.w3schools.com/css/css_float.asp^0|1|K|O|2|T|2|1U|K|2N|2|0|0|A|0|0|3|5|9|5|G|D|1|0^^$0|@$1|2|3|4|5|6|7|T|8|@$9|U|A|V|B|C]|$9|W|A|X|B|C]|$9|Y|A|Z|B|C]|$9|10|A|11|B|C]|$9|12|A|13|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|14|8|@]|D|@$9|15|A|16|1|17]]|E|$]]|$1|H|3|I|5|6|7|18|8|@$9|19|A|1A|B|C]|$9|1B|A|1C|B|C]]|D|@$9|1D|A|1E|1|1F]]|E|$]]|$1|J|3|-4|5|6|7|1G|8|@]|D|@]|E|$]]]|K|$L|$5|M|N|O|E|$P|Q]]|R|$5|M|N|O|E|$P|S]]]]

<p>Adding <code>style="float: left;"</code> to <code>ul</code> will cause the <code>ul</code> to only stretch as wide as the widest item.  However, the next element will be placed to the right of it.  Adding <code>style="clear: left;"</code> to the next element will place the next element after the <code>ul</code>.</p>

<p><a href="http://jsfiddle.net/w07hn13s/" rel="nofollow">Try it out</a></p>

<p>See <a href="http://www.w3schools.com/css/css_float.asp" rel="nofollow">documentation</a> on <code>float</code> and <code>clear</code>.</p>


blocks|key|855129|text|在不破坏现有布局样式的情况下解决此问题的最好方法是使用display:+inline-block将ul和li包装在div中|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|855130|+++<div+id='dropdown_tab'+style='display:+inline-block'>dropdown
++++++++<ul+id='dropdown_menu'+style='display:+none'>
++++++++++++<li>optoin+1</li>
++++++++++++<li>optoin+2</li>
++++++++++++<li+id='option_3'>optoin+3
++++++++++++++++<ul+id='dropdown_menu2'+style='display:+none'>
++++++++++++++++++++<li>second+1</li>
++++++++++++++++++++<li>second+2</li>
++++++++++++++++++++<li>second+3</li>
++++++++++++++++</ul>
++++++++++++</li>
++++++++</ul>
++++</div>|code-block|syntax|javascript|855131|entityMap^0|R|L|1D|2|1G|2|1L|3|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]|$9|R|A|S|B|C]|$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|L|$]]

<p>The best way of going about solving this without messing up the style of your existing layout, is by wrapping the <code>ul</code> and <code>li</code> in a <code>div</code> with <code>display: inline-block</code> </p>

<pre><code>   &lt;div id='dropdown_tab' style='display: inline-block'&gt;dropdown
        &lt;ul id='dropdown_menu' style='display: none'&gt;
            &lt;li&gt;optoin 1&lt;/li&gt;
            &lt;li&gt;optoin 2&lt;/li&gt;
            &lt;li id='option_3'&gt;optoin 3
                &lt;ul id='dropdown_menu2' style='display: none'&gt;
                    &lt;li&gt;second 1&lt;/li&gt;
                    &lt;li&gt;second 2&lt;/li&gt;
                    &lt;li&gt;second 3&lt;/li&gt;
                &lt;/ul&gt;
            &lt;/li&gt;
        &lt;/ul&gt;
    &lt;/div&gt;
</code></pre>


blocks|key|5451224|text|不幸的是，现有的答案都不能提供正确的解决方案。它们的范围从滥用float属性到完全重构你的超文本标记语言，这通常是不可行的。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|5451225|元素将display:+block;作为其默认的display属性，导致宽度填满了其容器的100%25。|5451226|要更改此方面并仍然保留<ul>显示方式的所有其他默认属性(例如，避免其他答案中的float问题)，请将display:+inline-block;应用于列表：|5451227|​|5451228|ul+{
++++display:+inline-block;
++++background-color:+green;
}
.highlight+{
++++background-color:+orange;+/*+for+demonstration+*/
++++padding:+15px;+/*+for+demonstration+*/
}|code-block|syntax|javascript|5451229|<ul>
+++<li>apple</li>
+++<li+class="highlight">orange</li>
+++<li>pear</li>
+++<li>banana</li>
</ul>|5451230|5451231|entityMap|0|LINK|mutability|MUTABLE|url|https://www.w3.org/TR/css-display-3/#valdef-display-block^0|V|5|0|3|F|O|7|O|7|0|0|B|4|14|5|1F|M|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|11|8|@$9|12|A|13|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|14|8|@$9|15|A|16|B|C]|$9|17|A|18|B|C]]|D|@$9|19|A|1A|1|1B]]|E|$]]|$1|H|3|I|5|6|7|1C|8|@$9|1D|A|1E|B|C]|$9|1F|A|1G|B|C]|$9|1H|A|1I|B|C]]|D|@]|E|$]]|$1|J|3|K|5|6|7|1J|8|@]|D|@]|E|$]]|$1|L|3|M|5|N|7|1K|8|@]|D|@]|E|$O|P]]|$1|Q|3|R|5|N|7|1L|8|@]|D|@]|E|$O|P]]|$1|S|3|K|5|6|7|1M|8|@]|D|@]|E|$]]|$1|T|3|-4|5|6|7|1N|8|@]|D|@]|E|$]]]|U|$V|$5|W|X|Y|E|$Z|10]]]]

<p>None of the existing answers provide the correct solution, unfortunately. They range from abusing the <code>float</code> property to totally restructuring your HTML, something which often isn't feasible.</p>
<p>The <a href="https://www.w3.org/TR/2011/WD-html-markup-20110113/ul.html#ul-display" rel="nofollow noreferrer"><code>&lt;ul&gt;</code></a> element has <code>display: block;</code> as its default <a href="https://www.w3.org/TR/css-display-3/#valdef-display-block" rel="nofollow noreferrer"><code>display</code></a> property, causing the width to fill 100% of its container.</p>
<p>To change this aspect and still retain all the other default properties of how a <code>&lt;ul&gt;</code> is displayed (e.g. avoid issues with <code>float</code> from other answers), apply <code>display: inline-block;</code> to the list:</p>
<p><div class="snippet" data-lang="js" data-hide="false" data-console="false" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-css lang-css prettyprint-override"><code>ul {
    display: inline-block;
    background-color: green;
}
.highlight {
    background-color: orange; /* for demonstration */
    padding: 15px; /* for demonstration */
}</code></pre>
<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;ul&gt;
   &lt;li&gt;apple&lt;/li&gt;
   &lt;li class="highlight"&gt;orange&lt;/li&gt;
   &lt;li&gt;pear&lt;/li&gt;
   &lt;li&gt;banana&lt;/li&gt;
&lt;/ul&gt;</code></pre>
</div>
</div>
</p>


<p>Given the following markup:</p>

<pre><code>&lt;ul&gt;
   &lt;li&gt;apple&lt;/li&gt;
   &lt;li class="highlight"&gt;orange&lt;/li&gt;
   &lt;li&gt;pear&lt;/li&gt;
&lt;/ul&gt;
</code></pre>

<p>Both the <code>ul</code>s and the <code>li</code>s widths appear to be 100%. If I apply a <code>background-color</code> to the list item, the highlight stretches the full width of the page.</p>

<p>I only want the background highlight to stretch as wide as the widest item (with maybe some padding). How do I constrain the <code>li</code>s (or perhaps the <code>ul</code>s) width to the width of the widest item?</p>


How can I constrain a <ul>'s width to the width of the widest item?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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给定以下标记：<ul>   <li>apple</li>   <li class="highlight">orange</li>   <li>pear</li></ul>ul和li的宽度都显示为100%。如果我对列表项应用background-color，突出显示会拉伸整个页面的宽度。我只想背景高亮伸展作为最宽的项目(...

问如何将<ul>的宽度限制为最宽项目的宽度？
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问如何将<ul>的宽度限制为最宽项目的宽度？EN