HTML/CSS/Style Basics/Style overwrite
Содержание
CLASS overrules ELEMENT
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title>Specificity</title>
<style type="text/css" media="screen">
h1 {
color:#000;
}
p {
color:#000;
}
div h1 {
color:#333;
}
div p {
color:#333;
}
div.module h1 {
color:#666;
}
div.module p {
color:#666;
}
</style>
</head>
<body>
<h1>Page Title</h1>
<p>This is a test. This is a test. </p>
<div>
<h1>Page Title</h1>
<p>This is a test. This is a test. </p>
</div>
<div class="module">
<h1>Page Title</h1>
<p>This is a test. This is a test. </p>
</div>
</body>
</html>
class style overwrites the wildcard style
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
<head>
<title> Property Inheritance </title>
<style type="text/css">
* {
font-family: sans-serif;
}
div {
font-family: "Times New Roman";
}
</style>
</head>
<body>
This font is sans-serif.
<div>
This font is Times New Roman.
</div>
</body>
</html>
ID overrules CLASS
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title>Specificity</title>
<style type="text/css" media="screen">
h1 {
color:#000;
}
p {
color:#000;
}
div h1 {
color:#333;
}
div p {
color:#333;
}
div.module h1 {
color:#666;
}
div.module p {
color:#666;
}
.module h1 {
color:#000;
}
.module p {
color:#000;
}
</style>
</head>
<body>
<h1>Page Title</h1>
<p>This is a test. This is a test. </p>
<div>
<h1>Page Title</h1>
<p>This is a test. This is a test. </p>
</div>
<div class="module">
<h1>Page Title</h1>
<p>This is a test. This is a test. </p>
</div>
<div id="content" class="module">
<h1>Page Title</h1>
<p>This is a test. This is a test. </p>
</div>
</body>
</html>
Id style overwrites the tag name style
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
<head>
<title> Property Inheritance </title>
<style type="text/css">
ul li {
border: thin solid black;
}
li#navigation {
border: thick solid black;
}
</style>
</head>
<body>
<ul>
<li> This is a test. </li>
<li id="navigation"> This is a test. </li>
</ul>
</body>
</html>
!important overrides all, including inline styles
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title>Specificity</title>
<style type="text/css" media="screen">
h1 {
color:#000;
}
p {
color:#000;
}
div h1 {
color:#333;
}
div p {
color:#333;
}
div.module h1 {
color:#666;
}
div.module p {
color:#666;
}
.module h1 {
color:#000;
}
.module p {
color:#000;
}
div#content h1 {
color:#999;
}
div#content p {
color:#999;
}
h1 {
color:#ccc !important;
}
p {
color:#ccc !important;
}
</style>
</head>
<body>
<h1>Page Title</h1>
<p>This is a test. This is a test. </p>
<div>
<h1>Page Title</h1>
<p>This is a test. This is a test. </p>
</div>
<div class="module">
<h1>Page Title</h1>
<p>This is a test. This is a test. </p>
</div>
<div id="content" class="module">
<h1>Page Title</h1>
<p>This is a test. This is a test. </p>
</div>
<div id="content" class="module">
<h1 style="color:#ccc;">Page Title</h1>
<p style="color:#ccc;">This is a test. This is a test. </p>
</div>
</body>
</html>
inline styles overrule everything except !important
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title>Specificity</title>
<style type="text/css" media="screen">
h1 {
color:#000;
}
p {
color:#000;
}
div h1 {
color:#333;
}
div p {
color:#333;
}
div.module h1 {
color:#666;
}
div.module p {
color:#666;
}
.module h1 {
color:#000;
}
.module p {
color:#000;
}
div#content h1 {
color:#999;
}
div#content p {
color:#999;
}
</style>
</head>
<body>
<h1>Page Title</h1>
<p>This is a test. This is a test. </p>
<div>
<h1>Page Title</h1>
<p>This is a test. This is a test. </p>
</div>
<div class="module">
<h1>Page Title</h1>
<p>This is a test. This is a test. </p>
</div>
<div id="content" class="module">
<h1>Page Title</h1>
<p>This is a test. This is a test. </p>
</div>
<div id="content" class="module">
<h1 style="color:#ccc;">Page Title</h1>
<p style="color:#ccc;">This is a test. This is a test. </p>
</div>
</body>
</html>
Style cascade
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
<head>
<title> Property Inheritance </title>
<style type="text/css">
div {
text-align: left;
color: white;
}
div {
text-align: center;
color: blue;
}
</style>
</head>
<body>
<div id="parentdiv">
The text is aligned center and blue.
</div>
</body>
</html>
Style cascade 1
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
<head>
<title> Property Inheritance </title>
<style type="text/css">
div {
text-align: left;
color: white;
}
div {
text-align: center;
color: blue;
}
</style>
</head>
<body>
<div id="parentdiv">
The text is aligned center and blue.
</div>
</body>
</html>