CSS Overflow
The CSS overflow property controls what happens when content overflows an element's box. By default, content that overflows an element is displayed outside the box, but this behavior can be changed using the overflow property. This property is especially useful when working with fixed dimensions and dynamic content.
Key Points on CSS Overflow:
- The
overflow
property controls the visibility of content that exceeds the dimensions of a container. - Common values for
overflow
includevisible
,hidden
,scroll
, andauto
. overflow-x
andoverflow-y
control overflow on the horizontal and vertical axes respectively.- Setting
overflow: hidden;
hides the overflowing content without adding scrollbars. - Using
overflow: scroll;
always shows scrollbars, even when the content doesn't overflow. - The
auto
value automatically adds scrollbars only when necessary.
Syntax for CSS Overflow:
Syntax Example
/* Syntax for overflow */
overflow: visible | hidden | scroll | auto;
/* Example */
overflow: hidden;
Examples of CSS Overflow:
The following examples demonstrate the usage of the overflow property:
Code Example: Overflow Hidden
div {
overflow: hidden;
width: 200px;
height: 100px;
border: 1px solid black;
}
Output
Code Example: Overflow Scroll
div {
overflow: scroll;
width: 200px;
height: 100px;
border: 1px solid black;
}
Output
Content that overflows will trigger scrollbars in this container.
Code Example: Overflow Auto
div {
overflow: auto;
width: 200px;
height: 100px;
border: 1px solid black;
}
Output
Scrollbars appear only if the content overflows in this container.
Common Overflow Values:
- visible: The content is not clipped and may overflow outside the element's box.
- hidden: The overflow is clipped, and no scrollbars are provided.
- scroll: The overflow is clipped, but scrollbars are always provided, even if they are not needed.
- auto: The overflow is clipped, but scrollbars are only provided when needed (default behavior).
Overflow properties are particularly useful in scenarios where you want to manage content within a fixed-size container, such as navigation menus, image galleries, or content sliders. Proper use of these properties can improve usability and prevent content from spilling out of view.