css float clear

CSS Float Clear

CSS float clear is one of the problems often encountered in CSS writing. During the layout process, the adaptive layout of elements on the page can be achieved by using the floating attribute. However, it is easy for floating elements to affect the layout of the web page, causing the entire page to display disorderly. In this case, the floating elements need to be cleared.

This article will introduce in detail the method of CSS float clearing to help readers solve the impact of floating on web page layout.

1. The basic concept of float

When doing CSS layout, float is a commonly used attribute. Use the float attribute to float elements to the left or right, thereby enabling adaptive web page layout. For example, the following code can make the image float to the left:

img {
    float: left;
}

2. The impact of floating

Although the float attribute in CSS can easily implement adaptive page elements Layout, but the impact of floating elements cannot be ignored.

Floating elements will cause the height of their parent elements to be lost and will affect the layout of subsequent elements. For example, when a parent element contains multiple floating elements, its height will be cleared, causing the following elements to not be laid out correctly. At this time, you need to clear the float to solve this problem.

3. Methods to clear floats

There are many ways to clear floats. Here are some of the more common methods.

3.1 Add the clear attribute to the parent element

When the parent element contains a floating element, you can clear the floating element by adding the clear attribute to the parent element. For example, the following code can make the parent element #container contain floating elements, thereby displaying the page layout correctly:

#container {
    overflow: hidden;
}

The above code adds the overflow attribute to the parent element and sets it to hidden, so that the floating elements can be cleared .

3.2 Use empty elements to clear floats

Using empty elements to clear floats is a very common method. Add an empty div element at the end of the parent element and set the clear attribute to it to clear the float.

For example, the following code can make the parent element #container clear the float:

.clear { clear: both; }
<div id="container">
    <div class="float-left"></div>
    <div class="float-right"></div>
    <div class="clear"></div>
</div>

In the above code, we add an empty div element to the parent element #container and give it Added .clear class so floats can be cleared.

3.3 Use pseudo elements to clear floats

You can also use pseudo elements to clear floats, which is more elegant. Add a pseudo-element after to the parent element, and then add the clear attribute to it.

For example, the following code can make the parent element #container clear the float:

#container::after {
    content: "";
    display: block;
    clear: both;
}

4. Summary

This article introduces the basics of CSS float clearing Concepts, the effects of float, and several ways to clear float. When laying out web pages, rational selection and flexible use of these methods can help us better handle the impact of floating on the layout, thereby achieving a more beautiful and flexible page layout.

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