In HTML5, the margin attribute is used to set the outer margin of an element. This attribute can be set to 1 to 4 values, and is used to set the values of the four outer margins respectively. The syntax is "
".
The operating environment of this tutorial: Windows 10 system, HTML5 version, Dell G3 computer.
The margin attribute sets the outer margin of an element.
This attribute can use 1 to 4 values:
If you specify a value, such as div {margin: 50px} - all margins are 50 px
If Specify two values, such as div {margin: 50px 10px} - the top and bottom margins are 50px, and the left and right margins are 10 px.
If three values are specified, such as div {margin: 50px 10px 20px}- the top margin is 50 px, the left and right margins are 10 px, and the bottom margin is 20 px.
If four values are specified, such as div {margin: 50px 10px 20px 30px} - the top margin is 50 px, the right margin is 10 px, the bottom margin is 20 px, and the left margin is 30 px .
Syntax:
Object.style.margin=margin
Percent (based on the percentage of the total height or width of the parent object)
Length value (defines a fixed margin)
auto (value set by browser).
The example is as follows:
<html>
<head>
<script type="text/javascript">
function changeMargin()
{
document.getElementById("p1").style.margin="100px";
}
</script>
</head>
<body>
<input type="button" onclick="changeMargin()" value="Change margins of a paragraph" />
<p id="p1">This is a paragraph</p>
</body>
</html>Output result:
Recommended tutorial: "html video tutorial"
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