css clear float clearfix

CSS clear float is one of the techniques often used in web page layout. It can avoid problems such as layout confusion and content overlap caused by floating elements. The most classic method of clearing floats is clearfix. Below we will introduce its principle and usage in detail.

1. The necessity of clearing floats

In web page layout, we often use floats to achieve the arrangement and layout of different elements. However, floated elements break away from the normal document flow, allowing their position to overlap with other elements in the document. If there is no suitable method for clearing floats, the page layout will have problems such as confusion and misalignment, and even cause some browser compatibility issues.

2. The principle of clearfix

clearfix is ​​a technique for clearing floats. Its principle is to insert a space by adding a clearfix class to the parent element of the floating element. element to achieve the purpose of clearing floats.

Specifically, the clearfix class needs to define the following style rules:

.clearfix::after {
content: "";
display: table;
clear: both;
}

In this code, the clearfix class uses the ::after pseudo-element, its content is empty, and the display attribute is set to table, which allows the element to be used as a block-level element, and Inserts a space at the end of the line, thereby clearing floats. The clear attribute can clear all floating elements before this element.

3. How to use clearfix

In practical applications, we can follow the following steps to use the clearfix technique:

1. Define the clearfix class in the CSS file:

.clearfix::after {
content: "";
display: table;
clear: both;
}

2. Add the clearfix class to the parent element of the floated element:

Float Left< ;/div>

Float Right

3. If you need to use it in multiple elements clearfix, you only need to use this class as a public class.

In short, clearfix is ​​a simple and effective floating floating technique, which can avoid some common layout problems and improve the compatibility and readability of the page. We hope this article is helpful to you. If you still have questions or want to learn more about CSS-related technologies, you can check out more relevant information.

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