margin-top is a property in CSS, used to set the top margin of an element. All mainstream browsers support the margin-top property. Let’s take a brief look at the usage of the margin-top property.
The syntax of margin-top is as follows:
margin-top:value
The value of value has the following possibilities:
auto: The top margin set by the browser.
length: Define a fixed top margin. The default value is 0.
%: Defines the top margin as a percentage based on the total height of the parent object.
inherit: Specifies that the top margin should be inherited from the parent element.
Let’s take a look at a simple code example:
<html>
<head>
<style type="text/css">
p.topmargin {margin-top: 5cm}
</style>
</head>
<body>
<p>这个段落没有指定外边距。</p>
<p class="topmargin">这个段落带有指定的上外边距。</p>
</body>
</html>The running results are as follows:
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