我是文本，哈哈，我想要在父容器中水平居中顯示。<\/div>18 <\/body>19 <\/html><\/pre> <\/p>
<\/p>
The rendering is as follows: <\/p>
<\/p>
☆ Horizontal centering setting - fixed-width block element <\/strong><\/p> When the element to be set is a block element, text-align: center will not work. There are two situations: fixed-width block Shape elements and block elements of variable width. Let’s take a look at fixed-width block elements first.
Elements that meet the two conditions of fixed width and block can be centered by setting the \"left and right margin\" value to \"auto\". Let's look at an example of setting the div block element to be horizontally centered:
html code: <\/p>
1 2 3 4 5 定寬塊狀元素水平居中<\/title> 6 <style> 7 div{ 8 border:1px solid red; 9 width:500px;10 margin:20px auto;11 }12 <\/style>13 <\/head>14 <body>
<h1><a href="http://www.miracleart.cn/">国产av日韩一区二区三区精品,成人性爱视频在线观看,国产,欧美,日韩,一区,www.成色av久久成人,2222eeee成人天堂</a></h1>15 <div>我是定寬塊狀元素，哈哈，我要水平居中顯示。<\/div>16 <\/body>17 <\/html><\/pre> <\/p> <p> <\/p> <p><br \/>Note: the \" The upper and lower margins can be set at will. <\/p> <p>The rendering is as follows: <\/p> <p> <\/p> <p><strong>☆Horizontal centering setting - variable width block element method (1) <\/strong><\/p> <p> In practice At work, we will encounter the need to set the center for \"block elements with variable widths\", such as pagination navigation on a web page. Because the number of paginations is uncertain, we cannot limit its flexibility by setting the width. <br \/>There are three methods for centering block elements with variable widths (these three methods are currently used more often): <br \/>1. Add the table tag <br \/>2. Set the display; inline method <br \/>3. Set position:relative and left:50%;<br \/>Let’s look at the first method first: <br \/>Step 1: Add a table tag (including <tbody>, <tr>) outside the centered element that needs to be set. ,<td> ). <br \/>Step 2: Set the \"left and right margins to be centered\" for this table (this is the same method as the fixed-width block element). <br \/>For example: <br \/>html code: <\/p> <p class=\"sycode\"> <pre class='brush:php;toolbar:false;'> 1 <!DOCTYPE HTML> 2 <html> 3 <head> 4 <meta charset=\"utf-8\"> 5 <title>不定寬塊狀元素水平居中<\/title> 6 <style> 7 table{ 8 margin:0 auto; 9 }10 ul{list-style:none;margin:0;padding:0;}11 li{float:left;display:inline;margin-right:8px;}12 <\/style>13 <\/head>14 <body>15 <div>16 <table>17 <tbody>18 <tr><td>19 <ul>20 <li><a href=\"#\">1<\/a><\/li>21 <li><a href=\"#\">2<\/a><\/li>22 <li><a href=\"#\">3<\/a><\/li>23 <\/ul>24 <\/td><\/tr>25 <\/tbody>26 <\/table>27 <\/div>28 <\/body>29 <\/html><\/pre> <\/p> <p> <\/p> <p>The rendering is as follows: <\/p> <p> <\/p> <p><strong>☆Horizontal centering setting - variable width block element method (2) <\/strong><\/p> <p> The second method: change the display of the block-level element to inline type, and then use text-align:center to achieve centering Effect. The following example: <br \/>html code: <\/p> <p class=\"sycode\"> <pre class='brush:php;toolbar:false;'> 1 <!DOCTYPE HTML> 2 <html> 3 <head> 4 <meta charset=\"utf-8\"> 5 <title>不定寬塊狀元素水平居中<\/title> 6 <style> 7 .container{text-align:center;} 8 .container ul{list-style:none;margin:0;padding:0;display:inline;} 9 .container li{margin-right:8px;display:inline;}10 <\/style>11 <\/head>12 13 <body>14 <div id="377j5v51b" class=\"container\">15 <ul>16 <li><a href=\"#\">1<\/a><\/li>17 <li><a href=\"#\">2<\/a><\/li>18 <li><a href=\"#\">3<\/a><\/li>19 <\/ul>20 <\/div>21 <\/body>22 <\/html><\/pre> <\/p> <p>The advantage of this method compared to the first method is that there is no need to add unsemantic tags, which simplifies the nesting depth of tags. But there are also some problems: it changes the display type of the block element to inline, turning it into an inline element, so it loses some functions, such as setting the length value. (The effect picture is as shown in the method one) <\/p> <p><strong>☆Horizontal centering setting - variable width block element method (3) <\/strong><\/p> <p>Method three: By setting float to the parent element, Then set position:relative and left:50% for the parent element, and set position:relative and left:-50% for the child element to achieve horizontal centering. <br \/>html code: <\/p> <p class=\"sycode\"> <pre class='brush:php;toolbar:false;'> 1 <!DOCTYPE HTML> 2 <html> 3 <head> 4 <meta charset=\"utf-8\"> 5 <title>不定寬塊狀元素水平居中<\/title> 6 <style> 7 .container{ 8 float:left; 9 position:relative;10 left:50%11 }12 .container ul{13 list-style:none;14 margin:0;15 padding:0;16 17 position:relative;18 left:-50%;19 }20 .container li{float:left;display:inline;margin-right:8px;}21 <\/style>22 <\/head>23 24 <body>25 <div id="377j5v51b" class=\"container\">26 <ul>27 <li><a href=\"#\">1<\/a><\/li>28 <li><a href=\"#\">2<\/a><\/li>29 <li><a href=\"#\">3<\/a><\/li>30 <\/ul>31 <\/div>32 <\/body>33 <\/html><\/pre> <\/p> <p> This method can retain block elements and still display them in the form of display:block. The advantage is that no silent discussion tags are added and no nesting is added. Depth, but its disadvantage is that position:relative is set, which brings certain side effects. These three methods are widely used and each has its own advantages and disadvantages. Which method to choose depends on the specific situation. (The effect picture is as shown in the method one) <\/p> <p><strong>Vertical centering setting<\/strong><\/p> <p><strong>☆Vertical centering - a single line of text with a determined height of the parent element<\/strong><\/p> <p> The method of vertically centering a single line of text whose height is determined by the parent element is achieved by setting the height and line-height of the parent element to be consistent. The following code: <\/p> <p class=\"sycode\"> <pre class='brush:php;toolbar:false;'> 1 <!DOCTYPE HTML> 2 <html> 3 <head> 4 <meta charset=\"utf-8\"> 5 <title>垂直居中<\/title> 6 <style> 7 .wrap h2{ 8 margin:0; 9 height:100px;10 line-height:100px;11 background:#ccc;12 }13 <\/style>14 <\/head>15 <body>16 <div id="377j5v51b" class=\"wrap\">17 <h2>hello,world!<\/h2>18 <\/div>19 <\/body>20 <\/html><\/pre> <\/p> <p> <\/p> <p>Rendering: <\/p> <p> <\/p> <p> <\/p> <p><strong>☆Vertical Centering - Multi-line text with a certain height of the parent element (Method 1) <\/strong><\/p> <p> There are two ways to vertically center multi-line text, pictures, and block elements with a certain height of the parent element: <br \/> Method 1: Use insert table (including tbody, tr, td) tags, and set vertical-align: middle. <br \/> Speaking of vertical centering, there is an attribute vertical-align in CSS for vertical centering, but this style will only take effect when the parent element is td or th. So we have to insert the table tag again. Let’s take a look at an example: <br \/>html code: <\/p> <p class=\"sycode\"> <pre class='brush:php;toolbar:false;'> 1 <!DOCTYPE HTML> 2 <html> 3 <head> 4 <meta charset=\"utf-8\"> 5 <title>父元素高度確定的多行文本<\/title> 6 <style> 7 .wrap{height:300px;background:#ccc} 8 <\/style> 9 <\/head>10 <body>11 <table><tbody><tr><td class=\"wrap\">12 <div>13 <p>看我是否可以居中。<\/p>14 <p>看我是否可以居中。<\/p>15 <p>看我是否可以居中。<\/p>16 <p>看我是否可以居中。<\/p>17 <p>看我是否可以居中。<\/p>18 <\/div>19 <\/td><\/tr><\/tbody><\/table>20 <\/body>21 <\/html><\/pre> <\/p> <p> <\/p> <p>注：因為 td 標(biāo)簽?zāi)J情況下就默認設(shè)置了 vertical-align 為 middle，所以我們不需要顯式地設(shè)置了。<\/p> <p>效果圖如下：<\/p> <p> <\/p> <p><strong>☆垂直居中-父元素高度確定的多行文本（方法二）<\/strong><\/p> <p> 在 chrome、firefox 及 IE8 以上的瀏覽器下可以設(shè)置塊級元素的 display 為 table-cell，激活 vertical-align 屬性，但注意 IE6、7 并不支持這個樣式。<br \/>html代碼：<\/p> <p class=\"sycode\"> <pre class='brush:php;toolbar:false;'> 1 <!DOCTYPE HTML> 2 <html> 3 <head> 4 <meta charset=\"utf-8\"> 5 <title>父元素高度確定的多行文本<\/title> 6 <style> 7 .container{ 8 height:300px; 9 background:#ccc;10 display:table-cell;\/*IE8以上及Chrome、Firefox*\/11 vertical-align:middle;\/*IE8以上及Chrome、Firefox*\/12 }13 <\/style>14 <\/head>15 16 <body>17 <div id="377j5v51b" class=\"container\">18 <div>19 <p>看我是否可以居中。<\/p>20 <p>看我是否可以居中。<\/p>21 <p>看我是否可以居中。<\/p>22 <p>看我是否可以居中。<\/p>23 <p>看我是否可以居中。<\/p>24 <\/div>25 <\/div>26 <\/body>27 <\/html><\/pre> <\/p> <p> 這種方法的好處是不用添加多余的無意義的標(biāo)簽，但缺點也很明顯，它的兼容性不是很好，不兼容 IE6、7。（效果圖如方法一圖）<\/p> <p><strong>隱形改變display類型<\/strong><\/p> <p><strong>☆隱形改變display類型<\/strong><\/p> <p> 有一個有趣的現(xiàn)象就是當(dāng)為元素（不論之前是什么類型元素，display:none 除外）設(shè)置以下 兩句之一：<br \/> position : absolute<br \/> float : left 或 float:right<br \/> 元素會自動變?yōu)橐?nbsp;display:inline-block 的方式顯示，當(dāng)然也可以設(shè)置元素的 width 和 height 了且默認寬度不占滿父元素。<br \/>如下面的代碼，小伙伴們都知道 a 標(biāo)簽是行內(nèi)元素，所以設(shè)置它的 width 是 沒有效果的，但是設(shè)置為 position:absolute 以后，就可以了。<\/p> <p class=\"sycode\"> <pre class='brush:php;toolbar:false;'> 1 <!DOCTYPE HTML> 2 <html> 3 <head> 4 <meta charset=\"utf-8\"> 5 <title>隱性改變display類型<\/title> 6 <style> 7 .container a{ 8 position:absolute; 9 width:200px;10 background:#ccc;11 12 }13 <\/style>14 <\/head>15 <body>16 <div id="377j5v51b" class=\"container\">17 <a href=\"#\" title=\"\">查看效果<\/a>18 <\/div>19 <\/body>20 <\/html><\/pre> <\/p> <p>?<\/p> <p>效果圖如下：<\/p> <p>?<\/p> <p class=\"sycode\"><\/p> <p class=\"sycode\"><\/p> <p class=\"sycode\"> <\/p>\n<p class=\"sycode\"><\/p> <p class=\"sycode\"><\/p> <p class=\"sycode\"> <\/p> <p class=\"sycode\"><\/p> <p class=\"sycode\"><\/p> "} </script>
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<h1 class="Articlelist_txts_title">CSS style design tips (horizontal centering, vertical centering)_html/css_WEB-ITnose</h1>
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<span id="377j5v51b" class="Articlelist_txts_time">Jun 24, 2016 am 11:47 AM</span>
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<p><strong>Horizontal center setting </strong></p> <p><strong> (If some phrases are unfamiliar, you can quickly browse through the essays I posted "html common tags", "CSS Summary (Part 1, 2, and 2)", and review it again). </strong></p> <p><strong>☆Horizontal centering setting - inline elements </strong></p> <p> In actual work, we often encounter scenarios where we need to set horizontal centering. Now let’s summarize how to set horizontal centering of. <br>If the set element is an inline element such as text or picture, horizontal centering is achieved by setting text-align:center to the parent element. The following code: <br>html code: </p> <p class="sycode"> <pre class='brush:php;toolbar:false;'> 1 <!DOCTYPE HTML> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 <title>定寬塊狀元素水平居中</title> 6 <style> 7 div{ 8 border:1px solid red; 9 margin:20px;10 }11 div.txtCenter{12 text-align:center;13 }14 </style>15 </head>16 <body>17 <div class="txtCenter">我是文本，哈哈，我想要在父容器中水平居中顯示。</div>18 </body>19 </html></pre> </p> <p> </p> <p>The rendering is as follows: </p> <p> </p> <p><strong>☆ Horizontal centering setting - fixed-width block element </strong></p> <p> When the element to be set is a block element, text-align: center will not work. There are two situations: fixed-width block Shape elements and block elements of variable width. Let’s take a look at fixed-width block elements first. <br /> Elements that meet the two conditions of fixed width and block can be centered by setting the "left and right margin" value to "auto". Let's look at an example of setting the div block element to be horizontally centered: <br />html code: </p> <p class="sycode"> <pre class='brush:php;toolbar:false;'> 1 <!DOCTYPE HTML> 2 <html> 3 <head> 4 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 5 <title>定寬塊狀元素水平居中</title> 6 <style> 7 div{ 8 border:1px solid red; 9 width:500px;10 margin:20px auto;11 }12 </style>13 </head>14 <body>15 <div>我是定寬塊狀元素，哈哈，我要水平居中顯示。</div>16 </body>17 </html></pre> </p> <p> </p> <p><br />Note: the " The upper and lower margins can be set at will. </p> <p>The rendering is as follows: </p> <p> </p> <p><strong>☆Horizontal centering setting - variable width block element method (1) </strong></p> <p> In practice At work, we will encounter the need to set the center for "block elements with variable widths", such as pagination navigation on a web page. Because the number of paginations is uncertain, we cannot limit its flexibility by setting the width. <br />There are three methods for centering block elements with variable widths (these three methods are currently used more often): <br />1. Add the table tag <br />2. Set the display; inline method <br />3. Set position:relative and left:50%;<br />Let’s look at the first method first: <br />Step 1: Add a table tag (including <tbody>, <tr>) outside the centered element that needs to be set. ,<td> ). <br />Step 2: Set the "left and right margins to be centered" for this table (this is the same method as the fixed-width block element). <br />For example: <br />html code: </p> <p class="sycode"> <pre class='brush:php;toolbar:false;'> 1 <!DOCTYPE HTML> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 <title>不定寬塊狀元素水平居中</title> 6 <style> 7 table{ 8 margin:0 auto; 9 }10 ul{list-style:none;margin:0;padding:0;}11 li{float:left;display:inline;margin-right:8px;}12 </style>13 </head>14 <body>15 <div>16 <table>17 <tbody>18 <tr><td>19 <ul>20 <li><a href="#">1</a></li>21 <li><a href="#">2</a></li>22 <li><a href="#">3</a></li>23 </ul>24 </td></tr>25 </tbody>26 </table>27 </div>28 </body>29 </html></pre> </p> <p> </p> <p>The rendering is as follows: </p> <p> </p> <p><strong>☆Horizontal centering setting - variable width block element method (2) </strong></p> <p> The second method: change the display of the block-level element to inline type, and then use text-align:center to achieve centering Effect. The following example: <br />html code: </p> <p class="sycode"> <pre class='brush:php;toolbar:false;'> 1 <!DOCTYPE HTML> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 <title>不定寬塊狀元素水平居中</title> 6 <style> 7 .container{text-align:center;} 8 .container ul{list-style:none;margin:0;padding:0;display:inline;} 9 .container li{margin-right:8px;display:inline;}10 </style>11 </head>12 13 <body>14 <div class="container">15 <ul>16 <li><a href="#">1</a></li>17 <li><a href="#">2</a></li>18 <li><a href="#">3</a></li>19 </ul>20 </div>21 </body>22 </html></pre> </p> <p>The advantage of this method compared to the first method is that there is no need to add unsemantic tags, which simplifies the nesting depth of tags. But there are also some problems: it changes the display type of the block element to inline, turning it into an inline element, so it loses some functions, such as setting the length value. (The effect picture is as shown in the method one) </p> <p><strong>☆Horizontal centering setting - variable width block element method (3) </strong></p> <p>Method three: By setting float to the parent element, Then set position:relative and left:50% for the parent element, and set position:relative and left:-50% for the child element to achieve horizontal centering. <br />html code: </p> <p class="sycode"> <pre class='brush:php;toolbar:false;'> 1 <!DOCTYPE HTML> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 <title>不定寬塊狀元素水平居中</title> 6 <style> 7 .container{ 8 float:left; 9 position:relative;10 left:50%11 }12 .container ul{13 list-style:none;14 margin:0;15 padding:0;16 17 position:relative;18 left:-50%;19 }20 .container li{float:left;display:inline;margin-right:8px;}21 </style>22 </head>23 24 <body>25 <div class="container">26 <ul>27 <li><a href="#">1</a></li>28 <li><a href="#">2</a></li>29 <li><a href="#">3</a></li>30 </ul>31 </div>32 </body>33 </html></pre> </p> <p> This method can retain block elements and still display them in the form of display:block. The advantage is that no silent discussion tags are added and no nesting is added. Depth, but its disadvantage is that position:relative is set, which brings certain side effects. These three methods are widely used and each has its own advantages and disadvantages. Which method to choose depends on the specific situation. (The effect picture is as shown in the method one) </p> <p><strong>Vertical centering setting</strong></p> <p><strong>☆Vertical centering - a single line of text with a determined height of the parent element</strong></p> <p> The method of vertically centering a single line of text whose height is determined by the parent element is achieved by setting the height and line-height of the parent element to be consistent. The following code: </p> <p class="sycode"> <pre class='brush:php;toolbar:false;'> 1 <!DOCTYPE HTML> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 <title>垂直居中</title> 6 <style> 7 .wrap h2{ 8 margin:0; 9 height:100px;10 line-height:100px;11 background:#ccc;12 }13 </style>14 </head>15 <body>16 <div class="wrap">17 <h2>hello,world!</h2>18 </div>19 </body>20 </html></pre> </p> <p> </p> <p>Rendering: </p> <p> </p> <p> </p> <p><strong>☆Vertical Centering - Multi-line text with a certain height of the parent element (Method 1) </strong></p> <p> There are two ways to vertically center multi-line text, pictures, and block elements with a certain height of the parent element: <br /> Method 1: Use insert table (including tbody, tr, td) tags, and set vertical-align: middle. <br /> Speaking of vertical centering, there is an attribute vertical-align in CSS for vertical centering, but this style will only take effect when the parent element is td or th. So we have to insert the table tag again. Let’s take a look at an example: <br />html code: </p> <p class="sycode"> <pre class='brush:php;toolbar:false;'> 1 <!DOCTYPE HTML> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 <title>父元素高度確定的多行文本</title> 6 <style> 7 .wrap{height:300px;background:#ccc} 8 </style> 9 </head>10 <body>11 <table><tbody><tr><td class="wrap">12 <div>13 <p>看我是否可以居中。</p>14 <p>看我是否可以居中。</p>15 <p>看我是否可以居中。</p>16 <p>看我是否可以居中。</p>17 <p>看我是否可以居中。</p>18 </div>19 </td></tr></tbody></table>20 </body>21 </html></pre> </p> <p> </p> <p>注：因為 td 標(biāo)簽?zāi)J情況下就默認設(shè)置了 vertical-align 為 middle，所以我們不需要顯式地設(shè)置了。</p> <p>效果圖如下：</p> <p> </p> <p><strong>☆垂直居中-父元素高度確定的多行文本（方法二）</strong></p> <p> 在 chrome、firefox 及 IE8 以上的瀏覽器下可以設(shè)置塊級元素的 display 為 table-cell，激活 vertical-align 屬性，但注意 IE6、7 并不支持這個樣式。<br />html代碼：</p> <p class="sycode"> <pre class='brush:php;toolbar:false;'> 1 <!DOCTYPE HTML> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 <title>父元素高度確定的多行文本</title> 6 <style> 7 .container{ 8 height:300px; 9 background:#ccc;10 display:table-cell;/*IE8以上及Chrome、Firefox*/11 vertical-align:middle;/*IE8以上及Chrome、Firefox*/12 }13 </style>14 </head>15 16 <body>17 <div class="container">18 <div>19 <p>看我是否可以居中。</p>20 <p>看我是否可以居中。</p>21 <p>看我是否可以居中。</p>22 <p>看我是否可以居中。</p>23 <p>看我是否可以居中。</p>24 </div>25 </div>26 </body>27 </html></pre> </p> <p> 這種方法的好處是不用添加多余的無意義的標(biāo)簽，但缺點也很明顯，它的兼容性不是很好，不兼容 IE6、7。（效果圖如方法一圖）</p> <p><strong>隱形改變display類型</strong></p> <p><strong>☆隱形改變display類型</strong></p> <p> 有一個有趣的現(xiàn)象就是當(dāng)為元素（不論之前是什么類型元素，display:none 除外）設(shè)置以下 兩句之一：<br /> position : absolute<br /> float : left 或 float:right<br /> 元素會自動變?yōu)橐?display:inline-block 的方式顯示，當(dāng)然也可以設(shè)置元素的 width 和 height 了且默認寬度不占滿父元素。<br />如下面的代碼，小伙伴們都知道 a 標(biāo)簽是行內(nèi)元素，所以設(shè)置它的 width 是 沒有效果的，但是設(shè)置為 position:absolute 以后，就可以了。</p> <p class="sycode"> <pre class='brush:php;toolbar:false;'> 1 <!DOCTYPE HTML> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 <title>隱性改變display類型</title> 6 <style> 7 .container a{ 8 position:absolute; 9 width:200px;10 background:#ccc;11 12 }13 </style>14 </head>15 <body>16 <div class="container">17 <a href="#" title="">查看效果</a>18 </div>19 </body>20 </html></pre> </p> <p>?</p> <p>效果圖如下：</p> <p>?</p> <p class="sycode"></p> <p class="sycode"></p> <p class="sycode"> </p>
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