blocks|key|881674|text|每边只能定义一个边框。你必须为此添加一个额外的元素！|type|unstyled|depth|inlineStyleRanges|entityRanges|data|881675|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

<p>You can define one border per side only. You would have to add an extra element for that!</p>


blocks|key|881768|text|边框仅按边定义，而不是在边的一部分中定义。所以你不能这么做。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|881769|此外，一个新的元素也不会是一个边框，它只会模仿你想要的行为--但它仍然是一个元素。|881770|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

<p>Borders are defined per side only, not in fractions of a side.  So, no, you can't do that.  </p>

<p>Also, a new element wouldn't be a border either, it would only mimic the behaviour you want - but it would still be an element.</p>


blocks|key|881793|text|对于水平线，您可以使用hr标记：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|881794|hr+{+width:+90%25;+}|code-block|syntax|javascript|881795|但是不可能限制边框高度。仅元素高度。|881796|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

<p>for horizontal lines you can use hr tag:</p>

<pre><code>hr { width: 90%; }
</code></pre>

<p>but its not possible to limit border height. only element height.</p>


blocks|key|1096701|text|希望这能有所帮助：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1096702|​|1096703|#mainDiv+{
++height:+100px;
++width:+80px;
++position:+relative;
++border-bottom:+2px+solid+#f51c40;
++background:+#3beadc;
}

#borderLeft+{
++border-left:+2px+solid+#f51c40;
++position:+absolute;
++top:+50%25;
++bottom:+0;
}|code-block|syntax|javascript|1096704|<div+id="mainDiv">
++<div+id="borderLeft"></div>
</div>|1096705|1096706|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|P|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|K|3|C|5|6|7|R|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|M|$]]

<p>Hope this helps:</p>

<p><div class="snippet" data-lang="js" data-hide="false">
<div class="snippet-code">
<pre class="snippet-code-css lang-css prettyprint-override"><code>#mainDiv {
  height: 100px;
  width: 80px;
  position: relative;
  border-bottom: 2px solid #f51c40;
  background: #3beadc;
}

#borderLeft {
  border-left: 2px solid #f51c40;
  position: absolute;
  top: 50%;
  bottom: 0;
}</code></pre>
<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div id="mainDiv"&gt;
  &lt;div id="borderLeft"&gt;&lt;/div&gt;
&lt;/div&gt;</code></pre>
</div>
</div>
</p>


blocks|key|881887|text|CSS生成的内容可以为您解决此问题：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|881888|​|881889|div+{
++position:+relative;
}


/*+Main+div+for+border+to+extend+to+50%25+from+bottom+left+corner+*/

div:after+{
++content:+"";
++background:+black;
++position:+absolute;
++bottom:+0;
++left:+0;
++height:+50%25;
++width:+1px;
}|code-block|syntax|javascript|881890|<div>Lorem+Ipsum</div>|881891|881892|(注意-为了呈现伪元素，content:+"";声明是必需的)|offset|length|style|CODE|881893|entityMap^0|0|0|0|0|0|C|C|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|U|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|V|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|F|7|W|8|@]|9|@]|A|$G|H]]|$1|K|3|C|5|6|7|X|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|Y|8|@$N|Z|O|10|P|Q]]|9|@]|A|$]]|$1|R|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|S|$]]

<p>CSS generated content can solve this for you:</p>

<p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-css lang-css prettyprint-override"><code>div {
  position: relative;
}


/* Main div for border to extend to 50% from bottom left corner */

div:after {
  content: "";
  background: black;
  position: absolute;
  bottom: 0;
  left: 0;
  height: 50%;
  width: 1px;
}</code></pre>
<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div&gt;Lorem Ipsum&lt;/div&gt;</code></pre>
</div>
</div>
</p>

<p>(note - the <code>content: "";</code> declaration is necessary in order for the pseudo-element to render)</p>


blocks|key|1096825|text|The+::after+pseudo-element+rocks+:)|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1096826|如果你玩一点，你甚至可以设置你调整大小的边框元素居中显示，或者只有当它旁边有另一个元素时才显示(就像在菜单中一样)。下面是一个带有菜单的示例：|1096827|#menu+>+ul+>+li+{
++++position:+relative;
++++float:+left;
++++padding:+0+10px;
}

#menu+>+ul+>+li+%2B+li::after+{
++++content:"";
++++background:+#ccc;
++++position:+absolute;
++++bottom:+25%25;
++++left:+0;
++++height:+50%25;
++++width:+1px;
}|code-block|syntax|javascript|1096828|​|1096829|#menu+>+ul+>+li+{
++position:+relative;
++float:+left;
++padding:+0+10px;
++list-style:+none;
}
#menu+>+ul+>+li+%2B+li::after+{
++content:+"";
++background:+#ccc;
++position:+absolute;
++bottom:+25%25;
++left:+0;
++height:+50%25;
++width:+1px;
}|1096830|<div+id="menu">
++<ul>
++++<li>Foo</li>
++++<li>Bar</li>
++++<li>Baz</li>
++</ul>
</div>|1096831|1096832|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.mozilla.org/en-US/docs/Web/CSS/::after^0|4|7|4|M|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|11|8|@$9|12|A|13|B|C]]|D|@$9|14|A|15|1|16]]|E|$]]|$1|F|3|G|5|6|7|17|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|18|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|19|8|@]|D|@]|E|$]]|$1|O|3|P|5|J|7|1A|8|@]|D|@]|E|$K|L]]|$1|Q|3|R|5|J|7|1B|8|@]|D|@]|E|$K|L]]|$1|S|3|N|5|6|7|1C|8|@]|D|@]|E|$]]|$1|T|3|-4|5|6|7|1D|8|@]|D|@]|E|$]]]|U|$V|$5|W|X|Y|E|$Z|10]]]]

<p>The <a href="https://developer.mozilla.org/en-US/docs/Web/CSS/::after" rel="nofollow noreferrer"><code>::after</code> pseudo-element</a> rocks :)</p>
<p>If you play a bit you can even set your resized border element to appear centered or to appear only if there is another element next to it (like in menus). Here is an example with a menu:</p>
<pre class="lang-css prettyprint-override"><code>#menu &gt; ul &gt; li {
    position: relative;
    float: left;
    padding: 0 10px;
}

#menu &gt; ul &gt; li + li::after {
    content:&quot;&quot;;
    background: #ccc;
    position: absolute;
    bottom: 25%;
    left: 0;
    height: 50%;
    width: 1px;
}
</code></pre>
<p><div class="snippet" data-lang="js" data-hide="true" data-console="false" data-babel="false">
<div class="snippet-code snippet-currently-hidden">
<pre class="snippet-code-css lang-css prettyprint-override"><code>#menu &gt; ul &gt; li {
  position: relative;
  float: left;
  padding: 0 10px;
  list-style: none;
}
#menu &gt; ul &gt; li + li::after {
  content: "";
  background: #ccc;
  position: absolute;
  bottom: 25%;
  left: 0;
  height: 50%;
  width: 1px;
}</code></pre>
<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div id="menu"&gt;
  &lt;ul&gt;
    &lt;li&gt;Foo&lt;/li&gt;
    &lt;li&gt;Bar&lt;/li&gt;
    &lt;li&gt;Baz&lt;/li&gt;
  &lt;/ul&gt;
&lt;/div&gt;</code></pre>
</div>
</div>
</p>


blocks|key|1096862|text|这是一个CSS技巧，不是一个正式的解决方案。我将代码中的句号保留为黑色，因为它有助于我定位元素。然后，对内容(颜色:白色)和(页边距顶部：-5px左右)进行着色，使其看起来就像没有句号一样。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1096863|div.yourdivname:after+{
++content:+"";
++border-bottom:+1px+solid+grey;
++width:+60%25;
++display:+block;
++margin:+0+auto;
}|code-block|syntax|javascript|1096864|关于这个问题的文章：https://www.steckinsights.com/shorten-length-border-bottom-pure-css/|offset|length|1096865|entityMap|0|LINK|mutability|MUTABLE|url|https://www.steckinsights.com/shorten-length-border-bottom-pure-css/^0|0|0|A|1W|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

<p>This is a CSS trick, not a formal solution. I leave the code with the period black because it helps me position the element. Afterward, color your content (color:white) and (margin-top:-5px or so) to make it as though the period is not there.</p>
<pre><code>div.yourdivname:after {
  content: &quot;&quot;;
  border-bottom: 1px solid grey;
  width: 60%;
  display: block;
  margin: 0 auto;
}
</code></pre>
<p>Article about this issue: <a href="https://www.steckinsights.com/shorten-length-border-bottom-pure-css/" rel="nofollow noreferrer">https://www.steckinsights.com/shorten-length-border-bottom-pure-css/</a></p>


<p>Is there any way to limit the length of a border. I have a <code>&lt;div&gt;</code> that has a bottom border, but I want to add a border on the left of the <code>&lt;div&gt;</code> that only stretches half of the way up. </p>

<p>Is there any way to do so without adding extra elements on the page? </p>


Any way to limit border length?

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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有没有办法限制边框的长度。我有一个有下边框的<div>，但我想在<div>的左侧添加一个仅向上延伸一半的边框。有没有办法做到这一点而不在页面上添加额外的元素？

问有没有办法限制边框长度？
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问有没有办法限制边框长度？EN