在一篇文章中收集所有的CSS代码片段几乎是不可能的事情,但是我们这里列出了一些相对于其他的更有用的代码片段,不要被这些代码的长度所吓到,因为它们都很容易实现,并且具有良好的文档。除了那些解决常见的恼人的问题外,也包含了一些解决新问题的新技术。
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%);
}
.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;
}
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;
}
div
{
-moz-column-count:3; /* Firefox */
-webkit-column-count:3; /* Safari and Chrome */
column-count:3;
}
td {
white-space: nowrap;
}
p:first-child::first-letter{
font-family: "papyrus";
font-size: 28px;
font-weight: bold;
}
/***** 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 */
.blurry-text {
color: transparent;
text-shadow: 0 0 5px rgba(0,0,0,0.5);
}
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%; }
// 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;
}
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 */
}
// 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;
}
#div {
min-height: 500px;
height:auto !important;
height: 500px;
}
#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');
}
/* 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 */
a[href], input[type='submit'], input[type='image'], label[for], select, button, .pointer {
cursor: pointer;
}
<!-- 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; }
}
<!-- example markup -->
<h1 class="portrait">Your device orientation is "portrait"<h1>
<h1 class="landscape">Your device orientation is "landscape"<h1>
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? */
}
/* 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 */
}
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: "" "";
}
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;
}
textarea { overflow: auto; }
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;
}
<!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>
* { 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>
.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)";
}
.content {
margin: 0 auto 8px;
display: table;
}
.content div {
display: table-cell;
}
<!--[if IE]>
.content {
display: block;
text-align: center;
}
.content div {
display: inline;
zoom: 1;
}
<![endif]-->
/* 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;
}
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 */
::selection
{
color: white;
background-color: red;
}
::-moz-selection /* Firefox needs an extra attention for this */
{
color: white;
background-color: red;
}
p:first-letter{
display:block;
margin:5px 0 0 5px;
float:left;
color:#FF3366;
font-size:60px;
font-family:Georgia;
}
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