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margin-bottom property

Sets or retrieves the height of the bottom margin of the object.

CSS 2.1, Section 5.5.3

Syntax

margin-bottom: <margin-width> | inherit

Property values

margin-width

Default. Bottom margin is set equal to the top margin.

inherit

Integer, followed by a percent sign (%). The value is a percentage of the height of the parent object.

CSS information

Applies ToAll elements
Mediavisual
Inheritedno
Initial Value0

Standards information

Remarks

As of a Windows Store app using JavaScript or later, you can specify possible length values relative to the height of the element's font (em) or the height of the letter "x" (ex).

In a Windows Store app using JavaScript, the specified margin value is added to the default value of the object. In a Windows Store app using JavaScript or later, the margin value is absolute. The margin properties do not work with the td and tr objects in a Windows Store app using JavaScript, but they do work in a Windows Store app using JavaScript. To set margins in the cell for a Windows Store app using JavaScript or later, apply the margin to an object, such as div or p, within the td.

For inline elements, the value of this property is used to compute the border area of a surrounding inline element, if present. This value does not contribute to the height of a line.

Negative margins are supported, except for top and bottom margins on inline objects.

Examples

In the following example, three div elements specify height, width, and background-color values. The second div element also specifies a margin-bottom value of 10px.


<div id="blue"></div>
<div id="yellow"></div>
<div id="green"></div>


#blue {
   background-color: #00A4EF;
   height: 50px;
   width: 50px;
}
#yellow {
   background-color: #FFB900;
   height: 50px;
   width: 50px;
   margin-bottom: 10px;
}
#green {
   background-color: #7FBA00;
   height: 50px;
   width: 50px;
}

The following image shows the result. The second div element has a bottom margin of 10 pixels.

Three squares with margin-bottom applied to the middle square

The following example uses inline scripting to set the bottom margin of the image to 1 centimeter when an onmouseover event occurs.


<!DOCTYPE html>
<html>
<head>
  <title>marginBottom</title>
</head>

<body>
  <p>
    Mouseover the sphere to expand its bottom margin to 1cm.
    Mouseout to return to the default bottom margin.
  </p>

  <!-- WE USE IN-LINE SCRIPTING TO HANDLE MOUSE EVENTS: -->
  <div style="border: 1px dashed red; width: 80px;">
    <img src="http://samples.msdn.microsoft.com/workshop/samples/author/dhtml/graphics/sphere.jpg"
      onmouseover="this.style.marginBottom='1cm'"
      onmouseout="this.style.marginBottom=''" />
  </div>
</body>
</html>

See also

CSSStyleDeclaration
currentStyle
defaults
runtimeStyle
style
Conceptual
CSS Values and Units Reference

 

 

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