blocks|key|865904|text|您可以将绝对定位的元素水平居中，方法是在左侧加上50%25减去元素宽度的一半(高度也是如此)：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|865905|.streamStartingSoon+{
++left:+50%25;
++margin-left:+-125px;+/*+Half+the+width+*/
}|code-block|syntax|javascript|865906|完整代码：|865907|​|865908|jQuery("#infor").delay(4000).fadeOut("slow");|865909|.streamStartingSoon+{
++width:+250px;
++height:+30px;
++background-color:+#65d1d4;
++opacity:+0.9;
++text-align:+center;
++vertical-align:+middle;
++line-height:+30px;
++position:+absolute;
++top:+50%25;
++margin:+auto;
++border-radius:+5px;
++left:+50%25;
++margin-top:+-15px;+/*+Half+the+height+*/
++margin-left:+-125px;+/*+Half+the+width+*/
}|865910|<script+src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<div+class="streamStartingSoon"+id="infor">
++<font+color="white"><strong>Stream+will+begin+shortly!</strong></font>
</div>|865911|865912|请参阅此article+on+CSS-tricks。|865913|transform:+translate(-50%25,+-50%25);也是可能的，但负边距与旧浏览器更兼容。|865914|entityMap|0|LINK|mutability|MUTABLE|url|https://css-tricks.com/snippets/css/absolute-center-vertical-horizontal-an-image/^0|O|3|0|0|0|0|0|0|0|0|4|L|0|0|0|X|0^^$0|@$1|2|3|4|5|6|7|17|8|@$9|18|A|19|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|1A|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|1B|8|@]|D|@]|E|$]]|$1|M|3|N|5|6|7|1C|8|@]|D|@]|E|$]]|$1|O|3|P|5|H|7|1D|8|@]|D|@]|E|$I|J]]|$1|Q|3|R|5|H|7|1E|8|@]|D|@]|E|$I|J]]|$1|S|3|T|5|H|7|1F|8|@]|D|@]|E|$I|J]]|$1|U|3|N|5|6|7|1G|8|@]|D|@]|E|$]]|$1|V|3|W|5|6|7|1H|8|@]|D|@$9|1I|A|1J|1|1K]]|E|$]]|$1|X|3|Y|5|6|7|1L|8|@$9|1M|A|1N|B|C]]|D|@]|E|$]]|$1|Z|3|-4|5|6|7|1O|8|@]|D|@]|E|$]]]|10|$11|$5|12|13|14|E|$15|16]]]]

<p>You can horizontal center an absolute positioned element with adding <code>50%</code> to the left minus the half of the width of your element (and same for the height):</p>

<pre><code>.streamStartingSoon {
  left: 50%;
  margin-left: -125px; /* Half the width */
}
</code></pre>

<p>Whole code:</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-js lang-js prettyprint-override"><code>jQuery("#infor").delay(4000).fadeOut("slow");</code></pre>
<pre class="snippet-code-css lang-css prettyprint-override"><code>.streamStartingSoon {
  width: 250px;
  height: 30px;
  background-color: #65d1d4;
  opacity: 0.9;
  text-align: center;
  vertical-align: middle;
  line-height: 30px;
  position: absolute;
  top: 50%;
  margin: auto;
  border-radius: 5px;
  left: 50%;
  margin-top: -15px; /* Half the height */
  margin-left: -125px; /* Half the width */
}</code></pre>
<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"&gt;&lt;/script&gt;
&lt;!-- Stream starting soon alert popup --&gt;
&lt;div class="streamStartingSoon" id="infor"&gt;
  &lt;font color="white"&gt;&lt;strong&gt;Stream will begin shortly!&lt;/strong&gt;&lt;/font&gt;
&lt;/div&gt;</code></pre>
</div>
</div>
</p>

<p>See this <a href="https://css-tricks.com/snippets/css/absolute-center-vertical-horizontal-an-image/" rel="nofollow">article on CSS-tricks</a>.</p>

<p><code>transform: translate(-50%, -50%);</code> is also possible, but negative margins are more compatible with old browsers.</p>


blocks|key|502140|text|从CSS中删除"position:+absolute;“并添加Center标签|type|unstyled|depth|inlineStyleRanges|entityRanges|data|502141|HTML|502142|
<div+class="streamStartingSoon"+id="infor">
++++<center><font+color="white"><strong>Stream+will+begin+shortly!</strong</font></center>
</div>|code-block|syntax|javascript|502143|CSS|502144|.streamStartingSoon{
width:+250px;+
height:+30px;+
background-color:+#65d1d4;
opacity:0.9;
text-align:+center;+
vertical-align:+middle;+
line-height:+30px;+
/*position:+absolute;*/
top:+250px;}|502145|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

<p>Remove "position: absolute;" from your CSS and add Center tags</p>

<p>HTML</p>

<pre><code>&lt;!-- Stream starting soon alert popup --&gt;
&lt;div class="streamStartingSoon" id="infor"&gt;
    &lt;center&gt;&lt;font color="white"&gt;&lt;strong&gt;Stream will begin shortly!&lt;/strong&lt;/font&gt;&lt;/center&gt;
&lt;/div&gt;
</code></pre>

<p>CSS</p>

<pre><code>.streamStartingSoon{
width: 250px; 
height: 30px; 
background-color: #65d1d4;
opacity:0.9;
text-align: center; 
vertical-align: middle; 
line-height: 30px; 
/*position: absolute;*/
top: 250px;}
</code></pre>


blocks|key|197812|text|因为你的定位是绝对正确的。要移动它，请使用top、bottom、left、right。将它们全部设置为0。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|197813|试试这个：|197814|jQuery("#infor").delay(4000).fadeOut("slow");|code-block|syntax|javascript|197815|.streamStartingSoon{
++width:+250px;+
++height:+30px;+
++background-color:+#65d1d4;
++opacity:0.9;
++text-align:+center;+
++vertical-align:+middle;+
++line-height:+30px;+
++position:+absolute;
++border-radius:+5px;
++margin:+auto;
++display:+block;
++top:+0;
++bottom:+0;
++left:+0;
++right:+0;
}|197816|<script+src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div+class="streamStartingSoon"+id="infor">
++<font+color="white"><strong>Stream+will+begin+shortly!</strong></font>
</div>|197817|​|197818|entityMap^0|L|3|P|6|W|4|11|5|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]|$9|X|A|Y|B|C]|$9|Z|A|10|B|C]|$9|11|A|12|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|13|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|14|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|J|7|15|8|@]|D|@]|E|$K|L]]|$1|O|3|P|5|J|7|16|8|@]|D|@]|E|$K|L]]|$1|Q|3|R|5|6|7|17|8|@]|D|@]|E|$]]|$1|S|3|-4|5|6|7|18|8|@]|D|@]|E|$]]]|T|$]]

<p>Since you are positioning it absolutely.
To move it around use <code>top</code>,<code>bottom</code>,<code>left</code>,<code>right</code>. set them all to 0.</p>

<p>Try this:
<div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-js lang-js prettyprint-override"><code>jQuery("#infor").delay(4000).fadeOut("slow");</code></pre>
<pre class="snippet-code-css lang-css prettyprint-override"><code>.streamStartingSoon{
  width: 250px; 
  height: 30px; 
  background-color: #65d1d4;
  opacity:0.9;
  text-align: center; 
  vertical-align: middle; 
  line-height: 30px; 
  position: absolute;
  border-radius: 5px;
  margin: auto;
  display: block;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
}</code></pre>
<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"&gt;&lt;/script&gt;
&lt;div class="streamStartingSoon" id="infor"&gt;
  &lt;font color="white"&gt;&lt;strong&gt;Stream will begin shortly!&lt;/strong&gt;&lt;/font&gt;
&lt;/div&gt;
         </code></pre>
</div>
</div>
</p>


blocks|key|865920|text|查看here了解有关div{display:table}、居中等的更多信息。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|865921|​|865922|jQuery("#infor").delay(4000).fadeOut("slow");|code-block|syntax|javascript|865923|html,body{+/*it+for+.div-table,+to+calculate+page+height+and+width,+but+you+can+also+change+for+any+element+which+inherit+(before)+of+.div-table*/
++height:100%25;
++width:100%25;
}
.div-table{
++width:100%25;
++height:100%25;
++display:table;
}
.div-center{
++++display:+table-cell;
++++vertical-align:+middle;
}
.streamStartingSoon{
++width:+250px;+
++height:+30px;+
++background-color:+#65d1d4;
++opacity:0.9;
++text-align:+center;+
++line-height:+30px;+
++border-radius:+5px;
++margin:0px+auto;
}|865924|<script+src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<div+class="div-table">
++<div+class="div-center">
+++++<div+class="streamStartingSoon"+id="infor">
++++++++<font+color="white"><strong>Stream+will+begin+shortly!</strong></font>
+++++</div>
++</div>
</div>|865925|865926|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/7059394/how-to-position-a-table-at-the-center-of-div-horizontally-vertically^0|2|4|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|X|8|@]|9|@$A|Y|B|Z|1|10]]|C|$]]|$1|D|3|E|5|6|7|11|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|12|8|@]|9|@]|C|$I|J]]|$1|K|3|L|5|H|7|13|8|@]|9|@]|C|$I|J]]|$1|M|3|N|5|H|7|14|8|@]|9|@]|C|$I|J]]|$1|O|3|E|5|6|7|15|8|@]|9|@]|C|$]]|$1|P|3|-4|5|6|7|16|8|@]|9|@]|C|$]]]|Q|$R|$5|S|T|U|C|$V|W]]]]

<p>Look <a href="https://stackoverflow.com/questions/7059394/how-to-position-a-table-at-the-center-of-div-horizontally-vertically">here</a> for more information about div{display:table}, centering  and ect.</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-js lang-js prettyprint-override"><code>jQuery("#infor").delay(4000).fadeOut("slow");</code></pre>
<pre class="snippet-code-css lang-css prettyprint-override"><code>html,body{ /*it for .div-table, to calculate page height and width, but you can also change for any element which inherit (before) of .div-table*/
  height:100%;
  width:100%;
}
.div-table{
  width:100%;
  height:100%;
  display:table;
}
.div-center{
    display: table-cell;
    vertical-align: middle;
}
.streamStartingSoon{
  width: 250px; 
  height: 30px; 
  background-color: #65d1d4;
  opacity:0.9;
  text-align: center; 
  line-height: 30px; 
  border-radius: 5px;
  margin:0px auto;
}
        
         </code></pre>
<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"&gt;&lt;/script&gt;
&lt;!-- Stream starting soon alert popup --&gt;
&lt;div class="div-table"&gt;
  &lt;div class="div-center"&gt;
     &lt;div class="streamStartingSoon" id="infor"&gt;
        &lt;font color="white"&gt;&lt;strong&gt;Stream will begin shortly!&lt;/strong&gt;&lt;/font&gt;
     &lt;/div&gt;
  &lt;/div&gt;
&lt;/div&gt;</code></pre>
</div>
</div>
</p>


<p>Here is my JSFiddle
<a href="https://jsfiddle.net/xdmns7e4/" rel="nofollow">https://jsfiddle.net/xdmns7e4/</a></p>

<p>HTML:</p>

<pre><code>    &lt;!-- Stream starting soon alert popup --&gt;
    &lt;div class="streamStartingSoon" id="infor"&gt;
            &lt;font color="white"&gt;&lt;strong&gt;Stream will begin shortly!&lt;/strong&gt;&lt;/font&gt;
    &lt;/div&gt;
</code></pre>

<p>CSS:</p>

<pre><code>.streamStartingSoon{
    width: 250px; 
    height: 30px; 
    background-color: #65d1d4;
    opacity:0.9;
    text-align: center; 
    vertical-align: middle; 
    line-height: 30px; 
    position: absolute;
    top: 250px;
</code></pre>

<p>JS:</p>

<pre><code>jQuery("#infor").delay(4000).fadeOut("slow");
</code></pre>

<p>I can't seem to get this code centered on my website... Any ideas?</p>


Having trouble centering a DIV element

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。

文章

问答

视频

学习中心

腾讯云实验室

直播

竞赛

腾讯云代码分析专区

腾讯iOA零信任安全管理系统专区

腾讯云架构师技术同盟交流圈

腾讯云数据库专区

腾讯云顾问专区

腾讯云原生专区

腾讯混元专区

腾讯云TCE专区

腾讯云Lighthouse专区

腾讯云HAI专区

腾讯云Edgeone专区

腾讯云存储专区

腾讯云智能专区

腾讯轻联专区 

腾讯云开发专区

TAPD专区

腾讯轻量云游戏服专区

腾讯云最具价值专家

腾讯云架构师技术同盟

腾讯云创作之星

腾讯云开发者先锋

腾讯云代码助手

云原生构建

TAPD 敏捷项目管理

Cloud Studio

SDK中心

API中心

命令行工具

涵盖代码开发、场景应用、自动测试全流程，助你从零构建专属AI助手

一站式MCP教程库，解锁AI应用新玩法

这是我的JSFiddle HTML：        <div class="streamStartingSoon" id="infor">            <font color="white"><strong>Stream wil...

问在将DIV元素居中时出现问题
EN

Stack Overflow用户

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问在将DIV元素居中时出现问题EN