After reviewing various CSS templates, I noticed that some classes contain the overflow:hidden property without a defined size. As far as I understand, block elements typically expand to accommodate their content unless instructed otherwise. Given this, it seems unnecessary to have the overflow:hidden property in place. Can I confidently remove it, or am I overlooking something crucial?
Although the primary purpose of the overflow property is to control overflow behavior, it also has another important impact on rendering. When you set the overflow property to anything other than visible, a block box establishes its own block formatting context.
This feature is commonly used to contain floats without requiring a clearfix. However, the creation of a new BFC has various implications beyond float containment, which are detailed in the specification. For more insights into this behavior, refer to this extensive analysis (surprisingly, the rationale behind this behavior is not solely related to float containment; it's more of an incidental outcome).
In essence, removing the overflow declaration could disrupt float layouts and other aspects of the design. It is advisable to retain this property unless absolutely necessary or if certain of its negligible impact on layout.
When floating children are present within the div, it is likely that overflow: hidden is used to confine them.
The use of overflow: hidden establishes a fresh block formatting context, which effectively contains any floated elements.
There are different solutions depending on the content of your div. If there are floated elements inside, you might consider applying the following code:
div {
height: auto;
overflow : hidden;
}
It's important to test the layout before removing this rule, as it could affect the overall design.
Using the CSS property overflow:hidden can be really helpful for containing child elements with a width larger than the container's max allowed width, preventing it from stretching the container.
For an example of this in action, check out this demo.
One common scenario where this is useful is when creating a carousel with floated child elements that need to stay inline but hidden until the left CSS property is adjusted to bring them into view.
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