css编写的技巧效果总结

1. 垂直对齐

如果你之前遇到过这个问题，你就应该知道它是多么的烦人，幸运的是，现在你可以使用CSS3变换来解决这个问题：

.vc{
position: relative;
top: 50%;
-webkit-transform: translateY(-50%);
-o-transform: translateY(-50%);
transform: translateY(-50%);
}
2. 只在一侧或者两侧具有投影

.box-shadow {
background-color: #AC92EC;
width: 160px;
height: 90px;
margin-top: -45px;
margin-left: -80px;
position: absolute;
top: 50%;
left: 50%;
}
.box-shadow:after {
content: "";
width: 150px;
height: 1px;
margin-top: 88px;
margin-left: -75px;
display: block;
position: absolute;
left: 50%;
z-index: -1;
-webkit-box-shadow: 0px 0px 8px 2px #000000;
-moz-box-shadow: 0px 0px 8px 2px #000000;
box-shadow: 0px 0px 8px 2px #000000;
}
3. 渐变背景动画效果

从CSS3开始，动画变得非常的酷了，但是切不可过分的使用它们。下面这一技巧巧妙地的移动背景位置，使其看起来像动画一样：

button {
padding: 15px;
background-image: linear-gradient(#FC6E51, #FFF);
background-size: auto 200%;
background-position: 0 100%;
transition: background-position 0.5s;
}
button:hover {
background-position: 0 0;
}
4. 将文本分成多列

div
{
-moz-column-count:3; /* Firefox */
-webkit-column-count:3; /* Safari and Chrome */
column-count:3;
}
5. 表格自动宽度

td {
white-space: nowrap;
}
6. 像出版物一样，第一个字变得大些

p:first-child::first-letter{
font-family: "papyrus";
font-size: 28px;
font-weight: bold;
}
7. 特定浏览器的CSS Hacks的完整列表

有时候解决跨浏览器兼容性可能会非常的棘手，但这些特定浏览器的技巧可能会帮你解决问题。

/***** Selector Hacks ******/

/* IE6 and below */
* html #uno { color: red }

/* IE7 */
*:first-child+html #dos { color: red }

/* IE7, FF, Saf, Opera */
html>body #tres { color: red }

/* IE8, FF, Saf, Opera (Everything but IE 6,7) */
html>/**/body #cuatro { color: red }

/* Opera 9.27 and below, safari 2 */
html:first-child #cinco { color: red }

/* Safari 2-3 */
html[xmlns*=""] body:last-child #seis { color: red }

/* safari 3+, chrome 1+, opera9+, ff 3.5+ */
body:nth-of-type(1) #siete { color: red }

/* safari 3+, chrome 1+, opera9+, ff 3.5+ */
body:first-of-type #ocho { color: red }

/* saf3+, chrome1+ */
@media screen and (-webkit-min-device-pixel-ratio:0) {
#diez { color: red }
}

/* iPhone / mobile webkit */
@media screen and (max-device-width: 480px) {
#veintiseis { color: red }
}

/* Safari 2 - 3.1 */
html[xmlns*=""]:root #trece { color: red }

/* Safari 2 - 3.1, Opera 9.25 */
*|html[xmlns*=""] #catorce { color: red }

/* Everything but IE6-8 */
:root *> #quince { color: red }

/* IE7 */
*+html #dieciocho { color: red }

/* Firefox only. 1+ */
#veinticuatro, x:-moz-any-link { color: red }

/* Firefox 3.0+ */
#veinticinco, x:-moz-any-link, x:default { color: red }

/***** Attribute Hacks ******/

/* IE6 */
#once { _color: blue }

/* IE6, IE7 */
#doce { *color: blue; /* or #color: blue */ }

/* Everything but IE6 */
#diecisiete { color/**/: blue }

/* IE6, IE7, IE8 */
#diecinueve { color: blue\9; }

/* IE7, IE8 */
#veinte { color/*\**/: blue\9; }

/* IE6, IE7 -- acts as an !important */
#veintesiete { color: blue !ie; } /* string after ! can be anything */

8. 创建模糊文本

.blurry-text {
color: transparent;
text-shadow: 0 0 5px rgba(0,0,0,0.5);
}

9. 不使用表格实现跨浏览器垂直水平居中图片

这段代码可以在一个已知宽高的容器内垂直水平居中一个未知大小的图片，这是 IE 的一个hack：

<figure class='logo'>
<span></span>
<img class='photo'/>
</figure>
.logo {
display: block;
text-align: center;
display: block;
text-align: center;
vertical-align: middle;
border: 4px solid #dddddd;
padding: 4px;
height: 74px;
width: 74px; }
.logo * {
display: inline-block;
height: 100%;
vertical-align: middle; }
.logo .photo {
height: auto;
width: auto;
max-width: 100%;
max-height: 100%; }

10. 高亮选中的 input

// HTML
<input id="mycheck1" type="checkbox" />
<label for="mycheck1">Check box label here</label>
<br />
<input id="mycheck2" type="checkbox" checked/>
<label for="mycheck2">Check box label here</label>
<br />
<input id="mycheck3" type="checkbox" />
<label for="mycheck3">Check box label here</label>

// CSS
input:checked + label{
background: yellow;
}
11. 跨浏览器透明度

selector {
filter: alpha(opacity=50); /* internet explorer */
-khtml-opacity: 0.5; /* khtml, old safari */
-moz-opacity: 0.5; /* mozilla, netscape */
opacity: 0.5; /* fx, safari, opera */
}
12. CSS投影

// 外投影
.shadow {
-moz-box-shadow: 5px 5px 5px #ccc;
-webkit-box-shadow: 5px 5px 5px #ccc;
box-shadow: 5px 5px 5px #ccc;
}

// 内投影
.shadow {
-moz-box-shadow:inset 0 0 10px #000000;
-webkit-box-shadow:inset 0 0 10px #000000;
box-shadow:inset 0 0 10px #000000;
}
13. 跨浏览器最小高度

#div {
min-height: 500px;
height:auto !important;
height: 500px;
}
14. 固定 Footer

#footer {
position:fixed;
left:0px;
bottom:0px;
height:30px;
width:100%;
background:#999;
}

/* IE 6 */
* html #footer {
position:absolute;
top:expression((0-(footer.offsetHeight)+(document.documentElement.clientHeight ? document.documentElement.clientHeight : document.body.clientHeight)+(ignoreMe = document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop))+'px');
}
15. 清除浮动 Clearfix

/* slightly enhanced, universal clearfix hack */
.clearfix:after {
visibility: hidden;
display: block;
font-size: 0;
content: " ";
clear: both;
height: 0;
}
.clearfix { display: inline-block; }
/* start commented backslash hack \*/
* html .clearfix { height: 1%; }
.clearfix { display: block; }
/* close commented backslash hack */
16. 给可点击元素添加手型光标

a[href], input[type='submit'], input[type='image'], label[for], select, button, .pointer {
cursor: pointer;
}
17. iPad 定向CSS

@media only screen and (max-device-width: 1024px) and (orientation:portrait) {
.landscape { display: none; }
}
@media only screen and (max-device-width: 1024px) and (orientation:landscape) {
.portrait { display: none; }
}


<h1 class="portrait">Your device orientation is "portrait"<h1>
<h1 class="landscape">Your device orientation is "landscape"<h1>
18. Pre 标签内文本换行

pre{
height: 120px;
overflow: auto;
font-family: “Consolas”,monospace;
font-size: 9pt;
text-align:left;
background-color: #FCF7EC;
overflow-x: auto; /* Use horizontal scroller if needed; for Firefox 2, not
white-space: pre-wrap; /* css-3 */
white-space: -moz-pre-wrap !important; /* Mozilla, since 1999 */
word-wrap: break-word; /* Internet Explorer 5.5+ */
margin: 0px 0px 0px 0px;
padding:5px 5px 3px 5px;
white-space : normal; /* crucial for IE 6, maybe 7? */
}
19. CSS3媒体查询

/* Smartphones (portrait and landscape) ----------- */
@media only screen
and (min-device-width : 320px)
and (max-device-width : 480px) {
/* Styles */
}

/* Smartphones (landscape) ----------- */
@media only screen
and (min-width : 321px) {
/* Styles */
}

/* Smartphones (portrait) ----------- */
@media only screen
and (max-width : 320px) {
/* Styles */
}

/* iPads (portrait and landscape) ----------- */
@media only screen
and (min-device-width : 768px)
and (max-device-width : 1024px) {
/* Styles */
}

/* iPads (landscape) ----------- */
@media only screen
and (min-device-width : 768px)
and (max-device-width : 1024px)
and (orientation : landscape) {
/* Styles */
}

/* iPads (portrait) ----------- */
@media only screen
and (min-device-width : 768px)
and (max-device-width : 1024px)
and (orientation : portrait) {
/* Styles */
}

/* Desktops and laptops ----------- */
@media only screen
and (min-width : 1224px) {
/* Styles */
}

/* Large screens ----------- */
@media only screen
and (min-width : 1824px) {
/* Styles */
}

/* iPhone 4 ----------- */
@media
only screen and (-webkit-min-device-pixel-ratio : 1.5),
only screen and (min-device-pixel-ratio : 1.5) {
/* Styles */
}
20. 重置加载

html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, font, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td {
margin: 0;
padding: 0;
border: 0;
outline: 0;
font-weight: inherit;
font-style: inherit;
font-size: 100%;
font-family: inherit;
vertical-align: baseline;
}
/* remember to define focus styles! */
:focus {
outline: 0;
}
body {
line-height: 1;
color: black;
background: white;
}
ol, ul {
list-style: none;
}
/* tables still need 'cellspacing="0"' in the markup */
table {
border-collapse: separate;
border-spacing: 0;
}
caption, th, td {
text-align: left;
font-weight: normal;
}
blockquote:before, blockquote:after,
q:before, q:after {
content: "";
}
blockquote, q {
quotes: "" "";
}
21. 多边框

元素必须是相对定位，且具有足够的padding来显示多余的边框：

#borders {
position:relative;
z-index:1;
padding:30px;
border:5px solid #f00;
background:#ff9600;
}
#borders:before {
content:"";
position:absolute;
z-index:-1;
top:5px;
left:5px;
right:5px;
bottom:5px;
border:5px solid #ffea00;
background:#4aa929;
}

#borders:after {
content:"";
position:absolute;
z-index:-1;
top:15px;
left:15px;
right:15px;
bottom:15px;
border:5px solid #00b4ff;
background:#fff;
}
22. 移除IE中textarea的滚动条

textarea { overflow: auto; }
23. 简单但好看的引用样式

css-blockquote

blockquote {
background:#f9f9f9;
border-left:10px solid #ccc;
margin:1.5em 10px;
padding:.5em 10px;
quotes:"\201C""\201D""\2018""\2019";
}
blockquote:before {
color:#ccc;
content:open-quote;
font-size:4em;
line-height:.1em;
margin-right:.25em;
vertical-align:-.4em;
}
blockquote p {
display:inline;
}
24. :-moz-placeholder

<!doctype html>
<html>
<head>
<title>Placeholder demo</title>
<style type="text/css">
input:-moz-placeholder {
color: green;
}
</style>
</head>
<body>
<input id="test" placeholder="Placeholder text!">
</body>
</html>
25. 另一种固定footer的方式

* { margin:0; padding:0; }

html, body, #wrap { height: 100%; }

body > #wrap {height: auto; min-height: 100%;}

#main { padding-bottom: 150px; } /* must be same height as the footer */

#footer {
position: relative;
margin-top: -150px; /* negative value of footer height */
height: 150px;
clear:both;}

/* CLEAR FIX*/
.clearfix:after {content: ".";
display: block;
height: 0;
clear: both;
visibility: hidden;}
.clearfix {display: inline-block;}
/* Hides from IE-mac \*/
* html .clearfix { height: 1%;}
.clearfix {display: block;}
/* End hide from IE-mac */
<div id="wrap">

<div id="main" class="clearfix">

</div>

</div>

<div id="footer">

</div>

26. 背景透明

.rgba {
background-color: transparent;
background-color: rgba(200,200,200,0.8);
filter:progid:DXImageTransform.Microsoft.gradient(startColorstr=#99dddddd,endColorstr=#99dddddd);
-ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorstr=#99dddddd,endColorstr=#99dddddd)";
}

27. 居中未知宽度的DIV元素

.content {
margin: 0 auto 8px;
display: table;
}

.content div {
display: table-cell;
}


28. 根据文件类型设置样式

/* external links */
a[href^="http://"]
{
padding-right: 13px;
background: url(external.gif) no-repeat center right;
}

/* emails */
a[href^="mailto:"]
{
padding-right: 20px;
background: url(email.png) no-repeat center right;
}

/* pdfs */
a[href$=".pdf"]
{
padding-right: 18px;
background: url(acrobat.png) no-repeat center right;
}

29. 解决IE6/7双倍margin/padding问题

ul li
{
float: right;
margin-right: 10px;
*display: inline; /*Target IE7 and bellow*/
_display: inline; /*Target IE6 and bellow*/
}
/* This example fixes the double right margin bug */

30. 更改选中文本的样式

::selection
{
color: white;
background-color: red;
}

::-moz-selection /* Firefox needs an extra attention for this */
{
color: white;
background-color: red;
}

31. 首字下沉

p:first-letter{
display:block;
margin:5px 0 0 5px;
float:left;
color:#FF3366;
font-size:60px;
font-family:Georgia;
}

32、如何清除图片下方出现几像素的空白间隙？

方法1：
img{display:block;}
方法2：
img{vertical-align:top;}
除了top值，还可以设置为text-top | middle | bottom | text-bottom，甚至特定的<length>和<percentage>值都可以
方法3：
#test{font-size:0;line-height:0;}
#test为img的父元素

33、如何让文本垂直对齐文本输入框？
方法：
input{vertical-align:middle;}

34、为什么Standard mode下IE无法设置滚动条的颜色？
方法：
html{
scrollbar-3dlight-color:#999;
scrollbar-darkshadow-color:#999;
scrollbar-highlight-color:#fff;
scrollbar-shadow-color:#eee;
scrollbar-arrow-color:#000;
scrollbar-face-color:#ddd;
scrollbar-track-color:#eee;
scrollbar-base-color:#ddd;
}

35、如何让未知尺寸的图片在已知宽高的容器内水平垂直居中？
方法：
#test{display:table-cell;*display:block;*position:relative;width:200px;height:200px;text-align:center;vertical-align:middle;}
#test p{*position:absolute;*top:50%;*left:50%;margin:0;}
#test p img{*position:relative;*top:-50%;*left:-50%;vertical-align:middle;}
#test是img的祖父节点，p是img的父节点。Know More：未知尺寸的图片如何水平垂直居中

36、如何容器透明，内容不透明？
方法1：
.outer{width:200px;height:200px;background:#000;filter:alpha(opacity=20);opacity:.2;}
.inner{width:200px;height:200px;margin-top:-200px;}

<div class="outer"></div>
<div class="inner">我是不透明的内容</div>
原理是容器层与内容层并级，容器层设置透明度，内容层通过负margin或者position绝对定位等方式覆盖到容器层上
方法2：
.outer{width:200px;height:200px;background:rgba(0,0,0,.2);background:#000\9;filter:alpha(opacity=20)\9;}
.outer .inner{position:relative\9;}

<div class="outer">
<div class="inner">我是不透明的内容</div>
</div>
高级浏览器直接使用rgba颜色值实现；IE浏览器在定义容器透明的同时，让子节点相对定位，也可达到效果

37、如何做1像素细边框的table？

方法：
#test{border-collapse:collapse; border:1px solid #ddd;}
#test th,#test td{border:1px solid #ddd;}

38、如何使页面文本行距始终保持为n倍字体大小的基调？
方法：
body{line-height:n;}

39、如何解决IE6下当li内部元素是定义了display:block的内联元素时底部产生空白的问题？

a,span{display:block;background:#ddd;}

<ul>
<li><a href="http://css.doyoe.com/">CSS参考手册</a></li>
<li><a href="http://blog.doyoe.com/">CSS探索之旅</a></li>
<li><a href="http://demo.doyoe.com/">web前端实验室</a></li>
<li><span>测试li内部元素为设置了display:block的内联元素时底部产生空白</span></li>
</ul>

如上代码，IE6及更早浏览器每个li内部的内联元素底部都会产生空白。解决方案是给li内部的内联元素再加上zoom:1

40、如何区别display:none与visibility:hidden？

方法：
相同的是display:none与visibility:hidden都可以用来隐藏某个元素；不同的是display:none在隐藏元素的时候，将其占位空间也去掉；而visibility:hidden只是隐藏了内容而已，其占位空间仍然保留。

41、如何解决IE7及更早浏览器下当li中出现2个或以上的浮动时，li之间产生的空白间隙的BUG？
方法：
li{vertical-align:top;}
除了top值，还可以设置为text-top | middle | bottom | text-bottom，甚至特定的<length>和<percentage>值都可以

转载于:https://www.cnblogs.com/design-engineer/p/5377759.html