CSS 定位元素
CSS 中的位置属性讲述了元素或 HTML 实体的定位方法。CSS 中有五种不同类型的位置属性:
- 固定的；不变的
- 静态
- 亲戚
- 绝对的
- 粘的
元素的定位可以使用顶部、右侧、底部和左侧属性来完成。这些参数指定了 HTML 元素与视口边缘的距离。要通过这四个属性设置位置，我们必须声明定位方法。让我们详细了解这些定位方法:
固定:任何带有位置的 HTML 元素:固定的属性将相对于视口定位。具有固定位置的元素允许它保持在相同的位置，即使我们滚动页面。我们可以使用顶部、右侧、底部、左侧来设置元素的位置。
示例:下面的示例通过使用位置:固定属性来说明 CSS 定位元素。
超文本标记语言
<!DOCTYPE html>
<html>
<head>
<title> CSS Positioning Element</title>
<style>
body {
margin: 0;
padding: 20px;
font-family: sans-serif;
background: #efefef;
}
.fixed {
position: fixed;
background: #cc0000;
color: #ffffff;
padding: 30px;
top: 50;
left: 10;
}
span {
padding: 5px;
border: 1px #ffffff dotted;
}
</style>
</head>
<body>
<div class="fixed">This div has
<span>position: fixed;</span>
</div>
<pre>
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to solve coding problems. Enrol now! Master core
Data Structures & Algorithms to ace interviews
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structure is a particular way of organizing data in
a computer so that it can be used effectively.
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to solve coding problems. Enrol now! Master core
Data Structures & Algorithms to ace interviews
from IIT & Stanford Alumni. TA Support. Placements
in Companies. Get Certified. 350+ Problems.A data
structure is a particular way of organizing data in
a computer so that it can be used effectively.
Learn the most common Data Structures & Algorithms
to solve coding problems. Enrol now! Master core
Data Structures & Algorithms to ace interviews
from IIT & Stanford Alumni. TA Support. Placements
in Companies. Get Certified. 350+ Problems.A data
structure is a particular way of organizing data in
a computer so that it can be used effectively.
Learn the most common Data Structures & Algorithms
to solve coding problems. Enrol now! Master core
Data Structures & Algorithms to ace interviews
from IIT & Stanford Alumni. TA Support. Placements
in Companies. Get Certified. 350+ Problems.A data
structure is a particular way of organizing data in
a computer so that it can be used effectively.
</pre>
</body>
</html>
输出:
静态:默认设置这种定位方式。如果我们不提及任何元素的定位方法，该元素默认具有位置: 静态方法。通过定义静态，顶部、右侧、底部和左侧将无法控制元素。该元素将按照页面的正常流动进行定位。
示例:下面的示例通过使用位置:静态属性来说明 CSS 定位元素。
超文本标记语言
<!DOCTYPE html>
<html>
<head>
<title> CSS Positioning Element</title>
<style>
body {
margin: 0;
padding: 20px;
font-family: sans-serif;
background: #efefef;
}
.static {
position: static;
background: #cc0000;
color: #ffffff;
padding: 30px;
}
span {
padding: 5px;
border: 1px #ffffff dotted;
}
</style>
</head>
<body>
<div class="static">
This div has
<span>position: static;</span>
</div>
<pre>
Learn the most common Data Structures & Algorithms
to solve coding problems. Enrol now! Master core
Data Structures & Algorithms to ace interviews
from IIT & Stanford Alumni. TA Support. Placements
in Companies. Get Certified. 350+ Problems.A data
structure is a particular way of organizing data in
a computer so that it can be used effectively.
Learn the most common Data Structures & Algorithms
to solve coding problems. Enrol now! Master core
Data Structures & Algorithms to ace interviews
from IIT & Stanford Alumni. TA Support. Placements
in Companies. Get Certified. 350+ Problems.A data
structure is a particular way of organizing data in
a computer so that it can be used effectively.
Learn the most common Data Structures & Algorithms
to solve coding problems. Enrol now! Master core
Data Structures & Algorithms to ace interviews
from IIT & Stanford Alumni. TA Support. Placements
in Companies. Get Certified. 350+ Problems.A data
structure is a particular way of organizing data in
a computer so that it can be used effectively.
Learn the most common Data Structures & Algorithms
to solve coding problems. Enrol now! Master core
Data Structures & Algorithms to ace interviews
from IIT & Stanford Alumni. TA Support. Placements
in Companies. Get Certified. 350+ Problems.A data
structure is a particular way of organizing data in
a computer so that it can be used effectively.
</pre>
</body>
</html>
输出:
相对:一个具有位置的元素:相对与位于其顶部的其他元素相对定位。如果我们设置它的顶部、右侧、底部或左侧，其他元素将不会填充这个元素留下的间隙。
示例:下面的示例通过使用位置:相对属性来说明 CSS 定位元素。
超文本标记语言
<!DOCTYPE html>
<html>
<head>
<title> CSS Positioning Element</title>
<style>
body {
margin: 0;
padding: 20px;
font-family: sans-serif;
background: #efefef;
}
.relative {
position: relative;
background: #cc0000;
color: #ffffff;
padding: 30px;
}
span {
padding: 5px;
border: 1px #ffffff dotted;
}
</style>
</head>
<body>
<pre>
Learn the most common Data Structures & Algorithms
to solve coding problems. Enrol now! Master core
Data Structures & Algorithms to ace interviews
from IIT & Stanford Alumni. TA Support. Placements
in Companies. Get Certified. 350+ Problems.A data
structure is a particular way of organizing data in
a computer so that it can be used effectively.
Learn the most common Data Structures & Algorithms
to solve coding problems. Enrol now! Master core
Data Structures & Algorithms to ace interviews
from IIT & Stanford Alumni. TA Support. Placements
in Companies. Get Certified. 350+ Problems.A data
structure is a particular way of organizing data in
a computer so that it can be used effectively.
<div class="relative">
This div has <span>position: relative;</span>
</div>
Learn the most common Data Structures & Algorithms
to solve coding problems. Enrol now! Master core
Data Structures & Algorithms to ace interviews
from IIT & Stanford Alumni. TA Support. Placements
in Companies. Get Certified. 350+ Problems.A data
structure is a particular way of organizing data in
a computer so that it can be used effectively.
Learn the most common Data Structures & Algorithms
to solve coding problems. Enrol now! Master core
Data Structures & Algorithms to ace interviews
from IIT & Stanford Alumni. TA Support. Placements
in Companies. Get Certified. 350+ Problems.A data
structure is a particular way of organizing data in
a computer so that it can be used effectively.
</pre>
</body>
</html>
输出:
绝对:具有位置的元素:绝对将相对于其父元素进行定位。这个元素的位置不依赖于它的兄弟或在同一层的元素。
示例:下面的示例通过使用位置:绝对属性来说明 CSS 定位元素。
超文本标记语言
<!DOCTYPE html>
<html>
<head>
<title> CSS Positioning Element</title>
<style>
body {
margin: 0;
padding: 20px;
font-family: sans-serif;
background: #efefef;
}
.absolute {
position: absolute;
background: #cc0000;
color: #ffffff;
padding: 30px;
font-size: 15px;
bottom: 20px;
right: 20px;
}
.relative {
position: relative;
background: #aad000;
height: 300px;
font-size: 30px;
border: 1px solid #121212;
text-align: center;
}
span {
padding: 5px;
border: 1px #ffffff dotted;
}
pre {
padding: 20px;
border: 1px solid #000000;
}
</style>
</head>
<body>
<pre>
Learn the most common Data Structures & Algorithms
to solve coding problems. Enrol now! Master core
Data Structures & Algorithms to ace interviews
from IIT & Stanford Alumni. TA Support. Placements
in Companies. Get Certified. 350+ Problems.A data
structure is a particular way of organizing data in
a computer so that it can be used effectively.
Learn the most common Data Structures & Algorithms
to solve coding problems. Enrol now! Master core
Data Structures & Algorithms to ace interviews
from IIT & Stanford Alumni. TA Support. Placements
in Companies. Get Certified. 350+ Problems.A data
structure is a particular way of organizing data in
a computer so that it can be used effectively.
<div class="relative">
<div >
This div has
<span>
<strong>position: relative;</strong>
</span>
</div>
<div class="absolute">
This div has
<span>
<strong>position: absolute;</strong>
</span>
</div>
</div>
Learn the most common Data Structures & Algorithms
to solve coding problems. Enrol now! Master core
Data Structures & Algorithms to ace interviews
from IIT & Stanford Alumni. TA Support. Placements
in Companies. Get Certified. 350+ Problems.A data
structure is a particular way of organizing data in
a computer so that it can be used effectively.
Learn the most common Data Structures & Algorithms
to solve coding problems. Enrol now! Master core
Data Structures & Algorithms to ace interviews
from IIT & Stanford Alumni. TA Support. Placements
in Companies. Get Certified. 350+ Problems.A data
structure is a particular way of organizing data in
a computer so that it can be used effectively.
Learn the most common Data Structures & Algorithms
to solve coding problems. Enrol now! Master core
Data Structures & Algorithms to ace interviews
from IIT & Stanford Alumni. TA Support. Placements
in Companies. Get Certified. 350+ Problems.A data
structure is a particular way of organizing data in
a computer so that it can be used effectively.
Learn the most common Data Structures & Algorithms
to solve coding problems. Enrol now! Master core
Data Structures & Algorithms to ace interviews
from IIT & Stanford Alumni. TA Support. Placements
in Companies. Get Certified. 350+ Problems.A data
structure is a particular way of organizing data in
a computer so that it can be used effectively.
Learn the most common Data Structures & Algorithms
to solve coding problems. Enrol now! Master core
Data Structures & Algorithms to ace interviews
from IIT & Stanford Alumni. TA Support. Placements
in Companies. Get Certified. 350+ Problems.A data
structure is a particular way of organizing data in
a computer so that it can be used effectively.
</pre>
</body>
</html>
输出:
粘性:元素带位置:粘性和顶部:0 根据放置的位置在固定&相对之间起作用。如果元素被放置在文档的中间，那么当用户滚动文档时，粘性元素开始滚动，直到它接触到顶部。当它接触顶部时，尽管进一步滚动，它仍将固定在该位置。我们可以把元素贴在底部，底部有属性。
示例:下面的示例通过使用位置:粘性属性来说明 CSS 定位元素。
超文本标记语言
<!DOCTYPE html>
<html>
<head>
<title> CSS Positioning Element</title>
<style>
body {
margin: 0;
padding: 20px;
font-family: sans-serif;
background: #efefef;
}
.sticky {
position: sticky;
background: #cc0000;
color: #ffffff;
padding: 30px;
top: 10px;
right: 50px;
}
span {
padding: 5px;
border: 1px #ffffff dotted;
}
pre {
padding: 20px;
border: 1px solid #000000;
}
</style>
</head>
<body>
<pre>
Learn the most common Data Structures & Algorithms
to solve coding problems. Enrol now! Master core
Data Structures & Algorithms to ace interviews
from IIT & Stanford Alumni. TA Support. Placements
in Companies. Get Certified. 350+ Problems.A data
structure is a particular way of organizing data in
a computer so that it can be used effectively.
Learn the most common Data Structures & Algorithms
to solve coding problems. Enrol now! Master core
Data Structures & Algorithms to ace interviews
from IIT & Stanford Alumni. TA Support. Placements
in Companies. Get Certified. 350+ Problems.A data
structure is a particular way of organizing data in
a computer so that it can be used effectively.
<div class="sticky">
This div has <span>position: sticky;</span>
</div>
Learn the most common Data Structures & Algorithms
to solve coding problems. Enrol now! Master core
Data Structures & Algorithms to ace interviews
from IIT & Stanford Alumni. TA Support. Placements
in Companies. Get Certified. 350+ Problems.A data
structure is a particular way of organizing data in
a computer so that it can be used effectively.
Learn the most common Data Structures & Algorithms
to solve coding problems. Enrol now! Master core
Data Structures & Algorithms to ace interviews
from IIT & Stanford Alumni. TA Support. Placements
in Companies. Get Certified. 350+ Problems.A data
structure is a particular way of organizing data in
a computer so that it can be used effectively.
Learn the most common Data Structures & Algorithms
to solve coding problems. Enrol now! Master core
Data Structures & Algorithms to ace interviews
from IIT & Stanford Alumni. TA Support. Placements
in Companies. Get Certified. 350+ Problems.A data
structure is a particular way of organizing data in
a computer so that it can be used effectively.
Learn the most common Data Structures & Algorithms
to solve coding problems. Enrol now! Master core
Data Structures & Algorithms to ace interviews
from IIT & Stanford Alumni. TA Support. Placements
in Companies. Get Certified. 350+ Problems.A data
structure is a particular way of organizing data in
a computer so that it can be used effectively.
Learn the most common Data Structures & Algorithms
to solve coding problems. Enrol now! Master core
Data Structures & Algorithms to ace interviews
from IIT & Stanford Alumni. TA Support. Placements
in Companies. Get Certified. 350+ Problems.A data
structure is a particular way of organizing data in
a computer so that it can be used effectively.
</pre>
</body>
</html>
输出:
支持的浏览器:
- 谷歌 Chrome 1.0
- 微软边缘 12.0
- Firefox 1.0
- Internet Explorer 4.0
- Opera 4.0
- Safari 1.0
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