CSS Layout - Overflow
The CSS overflow property controls what
happens to content that is too big to fit into an area.
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CSS Overflow
The overflow property specifies whether to clip content or
to add scrollbars when the content of an element is too big to fit in a specified
area.
The overflow property has the following values:
visible- Default. The overflow is not clipped. It renders outside the element's boxhidden- The overflow is clipped, and the rest of the content will be invisiblescroll- The overflow is clipped, but a scrollbar is added to see the rest of the contentauto- If overflow is clipped, a scrollbar should be added to see the rest of the content
Note: The overflow property only works for block elements with a specified height.
Note: In OS X Lion (on Mac), scrollbars are hidden by default and only shown when being used (even though "overflow:scroll" is set).
overflow: visible
By default, the overflow is visible, meaning that it is not clipped and it
renders outside the element's box:
Example
div {
width: 200px;
height:
50px;
background-color: #eee;
overflow: visible;
}
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overflow: hidden
With the hidden value, the overflow is clipped, and the rest of the content is hidden:
overflow: scroll
Setting the value to scroll, the overflow is clipped and a scrollbar is added to scroll inside the box. Note that this will add a scrollbar both horizontally and vertically (even if you do not need it):
overflow: auto
The auto value is similar to scroll, only it add scrollbars when necessary:
overflow-x and overflow-y
The overflow-x and overflow-y properties specifies
whether to change the overflow of content just horizontally or vertically (or
both):
overflow-x specifies what to do with the left/right edges of the
content.
overflow-y specifies what to do with the top/bottom edges of the
content.
Example
div {
overflow-x: hidden; /* Hide horizontal scrollbar
*/
overflow-y: scroll; /* Add vertical scrollbar */
}
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Test Yourself with Exercises!
Exercise 1 » Exercise 2 » Exercise 3 »
All CSS Overflow Properties
| Property | Description |
|---|---|
| overflow | Specifies what happens if content overflows an element's box |
| overflow-x | Specifies what to do with the left/right edges of the content if it overflows the element's content area |
| overflow-y | Specifies what to do with the top/bottom edges of the content if it overflows the element's content area |

