CSS Margins
CSS Margins
The CSS margin
properties are used to create space around elements,
outside of any defined borders.
With CSS, you have full control over the margins. There are properties for setting the margin for each side of an element (top, right, bottom, and left).
Margin - Individual Sides
CSS has properties for specifying the margin for each side of an element:
margin-top
margin-right
margin-bottom
margin-left
All the margin properties can have the following values:
- auto - the browser calculates the margin
- length - specifies a margin in px, pt, cm, etc.
- % - specifies a margin in % of the width of the containing element
- inherit - specifies that the margin should be inherited from the parent element
Tip: Negative values are allowed.
The following example sets different margins for all four sides of a <p> element:
Example
p {
margin-top: 100px;
margin-bottom: 100px;
margin-right: 150px;
margin-left: 80px;
}
Try it Yourself »
Margin - Shorthand Property
To shorten the code, it is possible to specify all the margin properties in one property.
The margin
property is a shorthand property for the following individual margin properties:
margin-top
margin-right
margin-bottom
margin-left
So, here is how it works:
If the margin
property has four values:
- margin: 25px 50px 75px 100px;
- top margin is 25px
- right margin is 50px
- bottom margin is 75px
- left margin is 100px
If the margin
property has three values:
- margin: 25px 50px 75px;
- top margin is 25px
- right and left margins are 50px
- bottom margin is 75px
If the margin
property has two values:
- margin: 25px 50px;
- top and bottom margins are 25px
- right and left margins are 50px
If the margin
property has one value:
- margin: 25px;
- all four margins are 25px
The auto Value
You can set the margin property to auto
to horizontally center the element within its container.
The element will then take up the specified width, and the remaining space will be split equally between the left and right margins:
The inherit Value
This example lets the left margin of the <p class="ex1"> element be inherited from the parent element (<div>):
Example
div {
border: 1px solid red;
margin-left: 100px;
}
p.ex1 {
margin-left:
inherit;
}
Try it Yourself »
Margin Collapse
Top and bottom margins of elements are sometimes collapsed into a single margin that is equal to the largest of the two margins.
This does not happen on left and right margins! Only top and bottom margins!
Look at the following example:
In the example above, the <h1> element has a bottom margin of 50px and the <h2> element has a top margin set to 20px.
Common sense would seem to suggest that the vertical margin between the <h1> and the <h2> would be a total of 70px (50px + 20px). But due to margin collapse, the actual margin ends up being 50px.
Test Yourself with Exercises!
Exercise 1 » Exercise 2 » Exercise 3 » Exercise 4 »
All CSS Margin Properties
Property | Description |
---|---|
margin | A shorthand property for setting the margin properties in one declaration |
margin-bottom | Sets the bottom margin of an element |
margin-left | Sets the left margin of an element |
margin-right | Sets the right margin of an element |
margin-top | Sets the top margin of an element |