HTML/CSS/Style Basics/Style overwrite
Содержание
CLASS overrules ELEMENT
<source lang="html4strict">
<!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>
Page Title
This is a test. This is a test.
Page Title
This is a test. This is a test.
Page Title
This is a test. This is a test.
</body> </html>
</source>
class style overwrites the wildcard style
<source lang="html4strict">
<!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.
This font is Times New Roman.
</body>
</html>
</source>
ID overrules CLASS
<source lang="html4strict">
<!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>
Page Title
This is a test. This is a test.
Page Title
This is a test. This is a test.
Page Title
This is a test. This is a test.
Page Title
This is a test. This is a test.
</body> </html>
</source>
Id style overwrites the tag name style
<source lang="html4strict">
<!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>
- This is a test.
</body>
</html>
</source>
!important overrides all, including inline styles
<source lang="html4strict">
<!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>
Page Title
This is a test. This is a test.
Page Title
This is a test. This is a test.
Page Title
This is a test. This is a test.
Page Title
This is a test. This is a test.
Page Title
This is a test. This is a test.
</body> </html>
</source>
inline styles overrule everything except !important
<source lang="html4strict">
<!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>
Page Title
This is a test. This is a test.
Page Title
This is a test. This is a test.
Page Title
This is a test. This is a test.
Page Title
This is a test. This is a test.
Page Title
This is a test. This is a test.
</body> </html>
</source>
Style cascade
<source lang="html4strict">
<!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>
The text is aligned center and blue.
</body>
</html>
</source>
Style cascade 1
<source lang="html4strict">
<!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>
The text is aligned center and blue.
</body>
</html>
</source>
