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Absolut tiefes Verständnis von CSS

高洛峰
Freigeben: 2017-02-09 16:30:52
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1. Absolut und Float haben die gleichen Eigenschaften, Wrapping und Destruktivität

1. Absolut und Float sind ähnlich (siehe Demo unten, wenn sich das Bild in der oberen linken Ecke befindet, dann verwenden Sie Float und Absolut). wird das Gleiche sein)

  1 <!doctype html>  2 <html>  3 <head>  4 <meta charset="utf-8">  5 <meta name="viewport" content="width=device-width">  6 <title>absolute和float高尔基</title>  7 <style>  8 body {  9     background-color: #B0DEF5; 10     font-size: 14px; font-family: arial; 11     color: #444; 12 } 13 a { 14     color: #0078b6; 15     text-decoration: none; 16 } 17 a:hover { 18     text-decoration: underline; 19 } 20 em { 21     font-style: normal; 22     color: #aeaeae; 23     margin: 0 5px; 24 } 25 svg { 26     position: absolute; 27 } 28 .container { 29     width: 560px; height: -webkit-calc(100vh - 16px); height: calc(100vh - 16px); 30     margin-left: auto; margin-right: auto; 31     background-color: #fff; 32 } 33 .list { 34     padding: 20px; 35     position: relative; 36 } 37 .space { 38     padding-left: 60px; 39     line-height: 22px; 40 } 41 .space img { 42     vertical-align: text-bottom; 43 } 44 .info { 45     font-size: 12px; 46     overflow: hidden; 47     color: #808080; 48 } 49 .from { 50     float: left; 51 } 52 .from a { 53     color: #9abbc8; 54 } 55 p { 56     margin: 6px 0; 57 } 58 .operate { 59     float: right; 60 } 61 .operate img { 62     vertical-align: text-bottom; 63     margin-right: 3px; 64 } 65 .test { 66     position: relative; 67     font-size: 18px; font-family: 'microsoft yahei'; 68 } 69 .test p { 70    width: 200px; 71    margin-left: auto; margin-right: auto; 72    padding: 5px; 73    background-color: #f0f0f0;     74 } 75 .test input { 76     width: 20px; height: 20px; 77     vertical-align: -4px; 78 } 79 </style> 80 </head> 81  82 <body> 83 <p class="container"> 84     <svg xmlns="http://www.w3.org/2000/svg" width="520" height="360"> 85         <path d="M45 80C45 280,45 320,165 300" stroke-width="1" stroke="#444" fill="none"></path> 86     </svg> 87     <p class="list"> 88         <a href="#" id="avatar" class="avatar" style="float: left;"><img src="http://img.mukewang.com/54447ac70001f5cc00500050.jpg"></a> 89         <p class="space"> 90             <a href="//weibo.com/mukewang" target="_blank" title="慕课网">慕课网</a> 91             <img src="http://img.mukewang.com/54447b1a0001750000160013.png"> 92             <a href="http://huati.weibo.com/k/%E6%85%95%E8%AF%BE%E7%BD%91%E6%B4%BB%E5%8A%A8?from=501">#慕课网活动#</a>【全民晒课ing,火速赢取IT图书】无论你是慕课网的“资深粉丝”,还是刚加入的新同学,在慕课网活动帖:<a href="http://www.imooc.com/wenda/detail/30394">http://www.php.cn/</a> 写下你在慕课网所学习的任意一门课程,并附上课程的学习心得,就有机会赢得精品IT好书。<img src="http://img.mukewang.com/54447cc700010dbf00220022.gif">这事很急哒,仅有2天呦。在<a href="http://huati.weibo.com/k/%E7%A8%8B%E5%BA%8F%E5%91%98%E8%8A%82?from=501">#程序员节#</a>送给自己一份礼物吧!<img src="http://img.mukewang.com/54447af90001ab1c00010001.gif"> 93             <p><img src="http://img.mukewang.com/54447aea0001f43301200084.jpg"></p> 94             <p class="info">     95                    <span class="from"> 96                     <a href="#">9月13日 10:27</a>  97                     <em>来自</em><a href="#">微博 weibo.com</a>                       98                 </span> 99                 <span class="operate">100                     <a href="javascript:" title="赞"><img src="http://img.mukewang.com/54447c350001055b00120013.png">(4)</a><em>|</em>101                     <a href="javascript:">转发(5)</a><em>|</em>102                     <a href="javascript:">收藏</a><em>|</em>103                     <a href="javascript:">评论(2)</a>104                 </span>105             </p>106         </p>107     </p>108     <p class="test">109         <p><input type="radio" name="layout" id="float" checked><label for="float">float: left;</label></p>110         <p><input type="radio" name="layout" id="absolute"><label for="absolute">position: absolute;</label></p>111     </p>112 </p>113 <script>114 var eleAvatar = document.getElementById("avatar"),115     eleFloat = document.getElementById("float"),116     eleAbsolute = document.getElementById("absolute");117 118 // SVG路径以及相关动画119 var elePath = document.querySelector("path"), timerPath = null;    
120 var funPathMove = function(end) {121     clearTimeout(timerPath);122     var d = elePath.getAttribute("d"), arrD = d.split(" ");123     // 动画起始值124     var start = arrD.slice(-1) * 1;125     if (start == end) return;126     // 速率127     var rate = 5, current = start;128     console.log(arrD);129     var step = function() {130         if (Math.abs(end - current) < 1) {131             current = end;132         } else {133             current += (end - current) / 5;134             timerPath = setTimeout(step, 30);135         }136         // 替换最后一个值137         arrD.splice(-1, 1, current);138         // 曲线走起139         elePath.setAttribute("d", arrD.join(" "));140     };141     step();142 };143 144 if (eleAvatar && eleFloat && eleAbsolute) {145     var attrFloat = eleAvatar.style.cssFloat != undefined? "cssFloat": "styleFloat";146     eleFloat.onclick = function() {147         eleAvatar.style.position = "";148         eleAvatar.style[attrFloat] = "left";149         elePath && funPathMove(300);150     };151     eleAbsolute.onclick = function() {152         eleAvatar.style[attrFloat] = "";153         eleAvatar.style.position = "absolute";154         elePath && funPathMove(340);155     };156 }157 </script>158 </body>159 </html>
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2. Destruktiv

 1 <!doctype html> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 <meta name="viewport" content="width=device-width"> 6 <title>absolute的破坏性</title> 7 <style> 8 .box { 9     padding: 10px;10     background-color: #f0f0f0;    11 }12 input {13     position: absolute; top: 234px;    14     width: 160px; height: 32px;15     font-size: 100%;16 }17 </style>18 </head>19 20 <body>21 <p class="box"><img id="image" src="http://img.mukewang.com/54447b06000171a002560191.jpg" width="256" height="191"></p>22 <input id="button" type="button" value="图片absolute化">23 <script>24 var eleImg = document.getElementById("image"), eleBtn = document.getElementById("button");25 if (eleImg != null && eleBtn != null) {26     eleBtn.onclick = function() {27         if (this.absolute) {28             eleImg.style.position = "";29             this.value = "图片absolute化";30             this.absolute = false;31         } else {32             eleImg.style.position = "absolute";33             this.value = "图片去absolute";34             this.absolute = true;35         }36     };37 }38 </script>39 </body>40 </html>
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3. Packbarkeit

 1 <!doctype html> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 <meta name="viewport" content="width=device-width"> 6 <title>absolute的包裹性</title> 7 <style> 8 .box { 9     padding: 10px;10     background-color: #f0f0f0;    11 }12 input {13     position: absolute; top: 234px;    14     width: 160px; height: 32px;15     font-size: 100%;16 }17 </style>18 </head>19 20 <body>21 <p id="box" class="box"><img src="http://img.mukewang.com/54447b06000171a002560191.jpg" width="256" height="191"></p>22 <input id="button" type="button" value="容器absolute化">23 <script>24 var eleBox = document.getElementById("box"), eleBtn = document.getElementById("button");25 if (eleBox != null && eleBtn != null) {26     eleBtn.onclick = function() {27         if (this.absolute) {28             eleBox.style.position = "";29             this.value = "容器absolute化";30             this.absolute = false;31         } else {32             eleBox.style.position = "absolute";33             this.value = "容器去absolute";34             this.absolute = true;35         }36     };37 }38 </script>39 </body>40 </html>
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2. Die Unabhängigkeit des Absoluten

Bei Verwendung des Absoluten muss es nicht zusammen mit dem Relativen verwendet werden Je unabhängiger es ist, desto leistungsfähiger ist es. 3. Absolute Eigenschaften

1 🎜>

css深入理解之absolute

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2. Standort folgen

 1 <!doctype html> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 <title>折翼天使表现特性一:去浮动</title> 6 <style> 7 input[type=button] { 8     height: 32px; 9     font-size: 100%;    10 }11 </style>12 </head>13 14 <body>15 <img src="http://img.mukewang.com/54447b06000171a002560191.jpg">16 <img src="http://img.mukewang.com/54447f4a0001eb7d01910256.jpg">17 <img src="http://img.mukewang.com/54447f550001ccb002560191.jpg">18 <p><input type="button" id="float" value="点击第2张图片应用float:left"></p>19 <p><input type="button" id="button" value="点击第2张图片应用position:absolute"></p>20 <script>21 var flbtn = document.getElementById("float"),22     button = document.getElementById("button"),23     image2 = document.getElementsByTagName("img")[1];24 if (flbtn && button && image2) {25     var value_init = button.value;26     button.onclick = function() {27         if (this.value == value_init) {28             image2.style.position = "absolute";29             this.value = "撤销";30         } else {31             image2.style.position = "";32             this.value = value_init;33         }34     };35     36     flbtn.onclick = function() {37         image2.style["cssFloat" in this.style? "cssFloat": "styleFloat"] = "left";38     };39 }40 </script>41 </body>42 </html>
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3. Jenseits des Überlaufs

 1 <!doctype html> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 <title>折翼天使表现特性二:位置跟随</title> 6 <style> 7 input[type=button] { 8     height: 32px; 9     font-size: 100%;10 }11 p { margin-left: 260px; }12 img + p { margin-top: 60px; }13 </style>14 </head>15 16 <body>17 <img src="http://img.mukewang.com/54447b06000171a002560191.jpg">18 <p><img src="http://img.mukewang.com/54447f4a0001eb7d01910256.jpg"></p>19 <img src="http://img.mukewang.com/54447f550001ccb002560191.jpg">20 <p><input type="button" id="block" value="点击第2张图片应用display:block"></p>21 <p><input type="button" id="button" value="点击第2张图片应用position:absolute变天使"></p>22 <script>23 var block = document.getElementById("block"),24     button = document.getElementById("button"),25     image2 = document.getElementsByTagName("img")[1];26 if (block && button && image2) {27     var value_init_button = button.value;28     button.onclick = function() {29         if (this.value == value_init_button) {30             image2.style.position = "absolute";31             this.value = "撤销";32         } else {33             image2.style.position = "";34             this.value = value_init_button;35         }36     };37     38     var value_init_block = block.value;39     block.onclick = function() {40         if (this.value == value_init_block) {41             image2.style.display = "block";42             this.value = "撤销";43         } else {44             image2.style.display = "";45             this.value = value_init_block;46         }    
47     };48 }49 </script>50 </body>51 </html>
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Beim Verschieben der Bildlaufleiste bewegt sich die Schaltfläche „Schließen“ nicht, da „Absolut“ eingestellt ist. 4. Tatsächliche Verwendung von Absolut

 1 <!doctype html> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 <title>超越overflow</title> 6 <style> 7 body { 8     background-color: #bbb; 9 }10 .scroll {11     width: 500px; height: 300px;12     margin: 200px auto 0;13     margin-top: -webkit-calc(50vh - 150px);14     margin-top: calc(50vh - 150px);15     border: 1px solid #ccc;16     border-radius: 3px;17     box-shadow: 0 0 3px rgba(0,0,0,.35);18     background-color: #fff;19     overflow: auto;20 }21 .close {22     position: absolute;23     width: 34px; height: 34px;    24     margin: -17px 0 0 483px;25     background: url(http://www.php.cn/) no-repeat;26 }27 .close:hover {28     background-position: 0 -41px;    29 }30 img {31     display: block;32     margin: 10px;33 }34 </style>35 </head>36 37 <body>38 <p class="scroll">39     <a href="javascript:" class="close" title="关闭"></a>40     <img src="http://img.mukewang.com/54447b06000171a002560191.jpg">41     <img src="http://img.mukewang.com/54447f550001ccb002560191.jpg">42 </p>43 </body>44 </html>
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1 das Bild oben

Hot, Empfehlungen und VIP werden alle mit absoluten und relativen implementiert

Code anzeigencss深入理解之absolute

wird nicht verwendet

2. Dropdown-Box-Positionierung

 1 <!doctype html> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 <title>图标定位二三事</title> 6 <style> 7 body { font: 14px/1.4 "Microsoft YaHei"; background-color: #EDEFF0; } 8 body, h3, h5 { margin: 0; } 9 img { border: 0 none; vertical-align: bottom; }10 .l { float: left; }.r { float: right; }11 .constr { width: 1200px; margin-left: auto; margin-right: auto; }12 .header { background-color: #2A2C2E; }13 .nav { height: 60px; }14 .nav-list { float: left; font-size: 14px; font-weight: 400; }15 .nav-a { display: inline-block; line-height: 20px; padding: 20px 35px; color: #B5BDC0; text-decoration: none; }16 .nav-a:hover { color: #fff; }17 18 .course { padding-top: 10px; }19 .course-list { float: left; width: 280px; height: 240px; margin: 5px 10px 15px; border-radius: 0 0 1px 1px; background-color: #F7FAF9; background-color: rgba(255,255,255,1); box-shadow: 0 1px 2px #c5c5c5; text-decoration: none; }20 .course-list-img { background-color: #6396F1; }21 .course-list-h { line-height: 50px; font-size: 14px; font-weight: 400; color: #363d40; text-align: center; }22 .course-list-tips { margin: 0 14px; font-size: 12px; color: #b4bbbf; overflow: hidden; }23 24 .icon-hot { position: absolute; width: 28px; height: 11px; margin: -6px 0 0 2px; background: url(http://www.php.cn/); }25 .icon-recom { position: absolute; line-height: 20px; padding: 0 5px; background-color: #f60; color: #fff; font-size: 12px; }26 .icon-vip { position: absolute; width: 36px; height: 36px; margin-left: -36px; background: url(http://www.php.cn/); text-indent: -9em; overflow: hidden; }27 </style>28 </head>29 30 <body>31 <p class="header">32     <p class="constr">33         <p class="nav">34             <h3 class="nav-list">35                 <a href="http://www.imooc.com/course/list" class="nav-a">课程</a>36             </h3>37             <h3 class="nav-list">38                 <a href="http://www.imooc.com/wenda" class="nav-a">问答</a>39             </h3>40             <h3 class="nav-list">41                 <a href="http://www.imooc.com/seek/index" class="nav-a">42                     求课<i class="icon-hot"></i>43                 </a>44             </h3>45         </p>46     </p>47 </p>48 49 <p class="main">50     <p class="constr">51         <p class="course">52             <a href="http://www.imooc.com/view/121" class="course-list">53                 <p class="course-list-img">54                     <span class="icon-recom">推荐</span>55                     <img width="280" height="160" alt="分享:CSS深入理解之float浮动" src="http://img.mukewang.com/53d74f960001ae9d06000338-300-170.jpg"><!--56                     --><i class="icon-vip">vip</i>57                 </p>58                 <h5 class="course-list-h">分享:CSS深入理解之float浮动</h5>59                 <p class="course-list-tips">60                     <span class="l">已完结</span>61                     <span class="r">3514人学习</span>62                 </p>63             </a>64         </p>65     </p>66 </p>67 </body>68 </html>
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verwendet eine abhängigkeitsfreie absolute Positionierung. Das heißt, es wird nur das Absolute verwendet und das Relative wird nicht verwendet

Code anzeigencss深入理解之absolute

3. Zentrierung und Kantenpositionierung

 1 <!doctype html> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 <title>下拉框定位二三事</title> 6 <style> 7 body { margin: 0; font: 14px/1.4 "Microsoft YaHei"; background-color: #EDEFF0; } 8 .constr { width: 1200px; max-width: 80%; margin-left: auto; margin-right: auto; padding-bottom: 300px; overflow: hidden; } 9 .course-sidebar { width: 262px; float: left; }10 .course-sidebar > p { border: 1px solid #e6e8e9; box-shadow: 0px 1px 2px #d5d7d8; background-color: #fff; }11 .course-sidebar-type { height: 380px; }12 .course-sidebar-search { margin-top: 20px; overflow: hidden; }13 .course-search-input { width: 200px; line-height: 18px; padding: 10px; margin: 0; border: 0 none; font-size: 12px; font-family: inherit; float: left; }14 .course-sidebar-search.focus { border-color: #2ea7e0; }15 .course-search-input:focus { outline: 0 none; }16 .course-search-input::-ms-clear { display: none; }17 .course-search-btn { width: 38px; height: 38px; float: right; background: url(http://www.php.cn/); text-indent: -9em; overflow: hidden; }18 .focus .course-search-btn { background-position: 0 -38px; }19 20 .course-sidebar-result { display: none; position: absolute; width: 260px; margin: 39px 0 0 -1px; padding-left: 0; list-style-type: none; border: 1px solid #e6e8e9; background-color: #fff; box-shadow: 0px 1px 2px #d5d7d8; font-size: 12px; }21 .course-sidebar-result > li { line-height: 30px; padding-left: 12px; }22 .course-sidebar-result > li:hover { background-color: #f9f9f9; }23 .course-sidebar-result a { display: block; color: #5e5e5e; text-decoration: none; }24 .course-sidebar-result a:hover { color: #000; }25 </style>26 </head>27 28 <body>29 <p class="constr">30     <p class="course-sidebar">31         <p class="course-sidebar-type"></p>32         <p class="course-sidebar-search">33             <ul id="result" class="course-sidebar-result">34                 <li><a href="http://www.imooc.com/view/121">分享:CSS深入理解之float浮动</a></li>35                 <li><a href="http://www.imooc.com/view/118">案例:CSS圆角进化论</a></li>36                 <li><a href="http://www.imooc.com/view/93">案例:CSS Sprite雪碧图应用</a></li>37                 <li><a href="http://www.imooc.com/view/77">案例:CSS3 3D 特效</a></li>38                 <li><a href="http://www.imooc.com/view/57">案例:如何用CSS进行网页布局</a></li>39             </ul>40             <input class="course-search-input" placeholder="课程搜索">41             <a href="javascript:" class="course-search-btn">搜索</a>42         </p>43     </p>44 </p>45 <script>46 (function() {47     var input = document.getElementsByTagName("input")[0],48         result = document.getElementById("result");49         50     if (input && result) {51         input.onfocus = function() {52             this.parentNode.className = "course-sidebar-search focus";53             if (this.value != "") {54                 // show datalist55                 result.style.display = "block";56             }57         };58         input.onblur = function() {59             if (this.value == "") {60                 this.parentNode.className = "course-sidebar-search";61             }62             // hide datalist63             result.style.display = "none";64         };65         66         // IE7 that wrap a p for avoid bad effect from float67         if (!document.querySelector) {68             var p = document.createElement("p");69             input.parentNode.insertBefore(p, input);70             p.appendChild(result);71         }72         // events of datalist73         if ("oninput" in input) {74             input.addEventListener("input", function() {75                 if (this.value.trim() != "") {76                     result.style.display = "block";77                 } else {78                     result.style.display = "none";79                 }80             });81         } else {82             // IE6-IE883             input.onpropertychange = function(event) {84                 event = event || window.event;85                 if (event.propertyName == "value" && /focus/.test(this.parentNode.className)) {86                     if (this.value != "") {87                         result.style.display = "block";88                     } else {89                         result.style.display = "none";90                     }91                 }92             }93         }94     }95 96 })();97 </script>98 </body>99 </html>
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Um eine Bildzentrierung zu erreichen und als Idee für die Kantenpositionierung können Sie unbegrenzte Absolutheit verwenden, die die Nachführbarkeit von   nutzt

 

im Code, das ist sehr wichtig

css深入理解之absolute

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4. Dateibildausrichtung und -positionierung

 1 <!doctype html> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 <title>居中、边缘定位二三事</title> 6 <style> 7 body { margin: 0; font: 14px/1.4 "Microsoft YaHei"; background-color: #EDEFF0; } 8 .constr { width: 1200px; max-width: 80%; margin-left: auto; margin-right: auto; } 9 .course-content { float: right; position: relative; width: 920px; min-height: 1200px; background: #fff; }10 .course-list-x { padding: 20px 10px; overflow: hidden; }11 .course-list { float: left; width: 280px; height: 240px; margin: 5px 10px 15px; border-radius: 0 0 1px 1px; background-color: #F7FAF9; background-color: rgba(255,255,255,1); box-shadow: 0 1px 2px #c5c5c5; text-decoration: none; }12 13 .goto_top_diaocha, .goto_top_app, .goto_top_feed { display: block; width: 48px; height: 48px; margin-top: 10px; background: url(http://www.php.cn/) no-repeat; }14 .goto_top_diaocha { background-position: -48px 0; }15 .goto_top_diaocha:hover { background-position: -48px -50px; }16 .goto_top_app { background-position: -96px 0; }17 .goto_top_app:hover { background-position: -96px -50px; }18 .goto_top_feed { background-position: -144px 0; }19 .goto_top_feed:hover { background-position: -144px -50px; }20 21 .course-loading-x { height: 0; margin-top: 20px; text-align: center; letter-spacing: -.25em; overflow: hidden; }22 .course-loading { position: absolute; margin-left: -26px; }23 24 .course-fixed-x { height: 0; text-align: right; overflow: hidden; }25 .course-fixed { display: inline; position: fixed; margin-left: 20px; bottom: 100px; }26 </style>27 </head>28 29 <body>30 <p class="constr">31     <p class="course-content">32         <p class="course-list-x">33             <p class="course-list"></p>34             <p class="course-list"></p>35             <p class="course-list"></p>36             <p class="course-list"></p>37             <p class="course-list"></p>38             <p class="course-list"></p>39         </p>40         <p class="course-loading-x">41              <img src="http://img.mukewang.com/5453077400015bba00010001.gif" class="course-loading" alt="加载中...">42         </p>43         <p class="course-fixed-x">44              <p class="course-fixed">45                 <a href="http://www.imooc.com/activity/diaocha" class="goto_top_diaocha"></a>46                 <a href="http://www.imooc.com/mobile/app" class="goto_top_app"></a>47                 <a href="http://www.imooc.com/user/feedback" class="goto_top_feed"></a>48             </p>49         </p>50     </p>51 </p>52 </body>53 </html>
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Tatsächlich Im Projekt sind an einigen Stellen Sterne vorhanden, an anderen nicht. Wenn Sie Probleme mit dem Text haben möchten, können Sie diese verwenden absolut

Für das Symbol vor dem Postfach und den Text, der über das Feld hinausgeht, können Sie absolute Absolut verwenden. Es bietet eine neue Idee für das Seitenlayout

css深入理解之absolute

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4. Absolut ist vom Dokumentenfluss getrennt

Die Animation sollte absolut verwendet werden so weit wie möglich, da Absolute vom Dokumentenfluss getrennt ist, sodass die Animation keine Auswirkungen auf andere Elemente hat

 1 <!doctype html> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 <title>文本图标对齐与定位二三事</title> 6 <style> 7 body { margin: 0; font: 14px/1.4 "Microsoft YaHei"; background-color: #EDEFF0; } 8 a { color: #50B6E5; } 9 .constr { width: 1200px; margin-left: auto; margin-right: auto; }10 .regist-head { height: 60px; line-height: 60px; padding-left: 30px; background-color: #be3948; color: #fff; font-size: 18px; }11 .regist-body { min-height: 400px; padding: 100px 0; background-color: #fff; }12 .regist-main { width: 600px; margin-left: auto; margin-right: auto; }13 .regist-group { margin-top: 20px; overflow: hidden; }14 .regist-label { width: 70px; padding-top: 10px; float: left; }15 .regist-cell { display: table-cell; *display: inline-block; }16 .regist-input { height: 18px; line-height: 18px; width: 260px; padding: 10px 5px; margin: 0 10px 0 0; border: 1px solid #d0d6d9; vertical-align: top; }17 .regist-code-input { width: 130px; }18 .regist-btn { display: inline-block; width: 160px; line-height: 40px; background-color: #39b94e; color: #fff; text-align: center; text-decoration: none; }19 .regist-btn:hover { background-color: #33a646; }20 .icon-warn { display: inline-block; width: 20px; height: 21px; background: url(http://www.php.cn/) no-repeat center; }21 22 .regist-star { position: absolute; margin-left: -1em; font-family: simsun; color: #f30; }23 .regist-remark { position: absolute; line-height: 21px; padding-top: 9px; color: #666; }24 .regist-warn { padding-left: 20px; color: #be3948; }25 .regist-warn > .icon-warn { position: absolute; margin-left: -20px; }26 </style>27 </head>28 29 <body>30 <p class="constr">31     <p class="regist-head">注册</p>32     <p class="regist-body">33         <p class="regist-main">34             <p class="regist-group">35                 <label class="regist-label"><span class="regist-star">*</span>登录邮箱</label>36                 <p class="regist-cell">37                     <input type="email" class="regist-input"><span class="regist-remark regist-warn">38                         <i class="icon-warn"></i>邮箱格式不准确(演示)39                     </span>40                 </p>41             </p>42             <p class="regist-group">43                 <label class="regist-label"><span class="regist-star">*</span>登录密码</label>44                 <p class="regist-cell">45                     <input type="password" class="regist-input"><span class="regist-remark">46                         请输入6-16位密码,区分大小写,不能使用空格47                     </span>48                 </p>49             </p>50             <p class="regist-group">51                 <label class="regist-label"><span class="regist-star">*</span>用户昵称</label>52                 <p class="regist-cell">53                     <input type="password" class="regist-input">54                 </p>55             </p>56             <p class="regist-group">57                 <label class="regist-label">手机号码</label>58                 <p class="regist-cell">59                     <input type="tel" class="regist-input">60                 </p>61             </p>62             <p class="regist-group">63                 <label class="regist-label"><span class="regist-star">*</span>验 证 码</label>64                 <p class="regist-cell">65                     <input class="regist-input regist-code-input"><img src="http://img.mukewang.com/545308540001678401500040.jpg">66                 </p>67             </p>68             <p class="regist-group">69                 <label class="regist-label"> </label>70                 <p class="regist-cell">71                     <input type="checkbox" checked><label>我已阅读并同意<a href="##">慕课协议</a>。</label>72                     <p>73                         <a href="javascript:" class="regist-btn">立即注册</a>74                     </p>75                 </p>76             </p>77         </p>78     </p>79 </p>80 </body>81 </html>
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