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Can the padding attribute in css have a negative value? Detailed explanation of padding attribute in css
- 寻∝梦Original
- 2018-09-08 13:44:0519538browse
Detailed introduction to the padding attribute in the css box model, and a mistake often made by novices, the padding attribute can really write negative values. The answer is at the end of the article. Now let us look at this article together
First we introduce the first question:# Can the padding attribute in
##cssbe a negative value? The answer is easy. We won’t introduce it first. There is an explanation on the use of negative values of the padding attribute at the end of the article.
Now let’s look at the usage of the padding attribute in css:padding: shorthand attribute sets all padding attributes (auto/length length value/ %)
- padding-top: defines the top padding
- padding-right: defines the right padding
- padding-bottom: defines the bottom padding
- padding-left: defines the left padding
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>PHP中文网</title>
<style type="text/css">
table{padding-top:20px;padding-right:50px;padding-bottom:100px;padding-left:20px;border:double;}
</style>
</head>
<body>
<table width="200px"; height="150px">
<tr><td>123</td><td>456</td></tr>
<tr><td>789</td><td>987</td></tr>
</table>
</body>
</html>The above code combines four Each attribute has been written. Although it is very messy, we still need to see how the code displays in the browser:
(I want to see more CSS style recommendations Go to the PHP Chinese website
column to learn) Is the effect very obvious? Let’s take a look at the code explanation:
- padding -top:20px: Define the top padding to 20 pixels.
- padding-right:50px: defines the padding on the right to be 50 pixels.
- padding-bottom:100px: Defines the bottom padding to be 100 pixels.
- padding-left:20px: Defines the left padding as 20 pixels, whether it is the same width as the top.
- border:double: Defines the border line as a double solid line.
<style type="text/css">
table{padding-top:20px;padding-right:50px;padding-bottom:-300px;padding-left:20px;border:double;}
</style>Let’s be a little exaggerated, let’s take a value of minus 300, let’s take a look at the effect:
After testing , and found that the effect was almost nonexistent, it was just equivalent to canceling the padding-bottom attribute.
It can be seen that padding in CSS cannot have negative values. If it does, it is equivalent to canceling that attribute.
Okay, the above is an article about the usage of padding in CSS styles. If you want to learn more, go to the
column on the PHP Chinese website. Students who have questions can ask below. 【Editor’s Recommendation】
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