How to cancel floating in css

CSS Unfloating is a very useful technology in web design. It can avoid unexpected layout problems caused by floating elements and ensure that the overall layout of the web page is more beautiful and standardized. This article will introduce you to floats and their associated CSS properties, as well as how to properly de-float them.

What is float?

In web design, floating is the movement of an element to the left or right, out of the normal flow of the document, and the surrounding content is rearranged to accommodate the size and position of the element. Under normal circumstances, floating can make the elements in the web page more flexible and make the layout of the web page more unified and neat. However, floating can also cause strange white space or overlap between elements, ruining the entire web design.

How to set elements to float?

Floating is achieved through the float attribute in CSS. The float attribute can have the following values:

left: Float the element to the left

right: Float the element to the right

none: Not floating, still in the normal document

Methods to clear floats in streams

In order to avoid layout problems caused by floats, it usually needs to be solved by clearing floats. The following are several methods to clear floats:

1. Use a class that clears floats

You can add the following code in the CSS file to define a class that clears floats:

.clearfix:before, .clearfix:after { content:""; display: table; } .clearfix:after { clear:both; } .clearfix { *zoom:1; }

In the HTML file, you only need to add the clearfix class to the elements that need to be cleared.

2. Use the overflow attribute

You can add the overflow attribute to the parent element of the element that needs to be cleared to clear the float. The following code:

.parent { overflow: hidden; }

The advantage of this method is that it is simple and easy to use, but it has a disadvantage: if the height of the floating element exceeds its parent element, then Elements may be truncated.

3. Using pseudo-elements

You can add a pseudo-element after the element whose float needs to be cleared, and set the clear attribute to clear the float. The following is a sample code:

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

This method will not cause element truncation, but it is compatible Sex is not as good as the first method.

Conclusion

In web design, floating can make web elements more flexible, but it may also cause layout problems. For elements that need to be unfloated, you can use the clear float method to avoid these problems. Specifically, there are three ways to clear floats: using a float-clearing class, using the overflow attribute, and using pseudo-elements. Each method has its advantages and disadvantages, and developers can choose which method to use based on their actual needs.

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