Is there any way to clear floats?

What is the method to clear float? Specific code examples are required

In web page layout, float is a common layout method that can make elements break away from the document flow and Position relative to other elements. However, a problem often encountered when using floating layout is that the parent element cannot wrap the floating element correctly, causing the page to have a disordered layout. Therefore, we need to take measures to clear the float so that the parent element can wrap the floated element correctly.

There are many ways to clear floats. The following will introduce several commonly used methods and give specific code examples.

1. Use clearfix technique

clearfix is ​​a commonly used method to clear floats. It adds a clearfix class to the parent element and uses the pseudo element::after to clear the float. The following is a specific code example:

<style>
.clearfix::after {
  content: "";
  display: table;
  clear: both;
}
</style>

<div class="clearfix">
  <div style="float: left; width: 50px; height: 50px; background-color: red;"></div>
  <div style="float: left; width: 50px; height: 50px; background-color: green;"></div>
</div>

In the above code, we add a clearfix class to the parent element div and set the style of clearfix::after. This clears the float so that the parent element correctly wraps the floated element.

2. Using the overflow attribute

Another commonly used method to clear floats is to use the overflow attribute. By adding the overflow attribute to the parent element, you can trigger the BFC (block-level formatting context), thereby clearing the float. The following is a specific code example:

<style>
.overflow-clearfix {
  overflow: hidden;
}
</style>

<div class="overflow-clearfix">
  <div style="float: left; width: 50px; height: 50px; background-color: red;"></div>
  <div style="float: left; width: 50px; height: 50px; background-color: green;"></div>
</div>

In the above code, we added the overflow: hidden attribute to the parent element div, so that the float can be cleared and the parent element can correctly wrap the floating element.

3. Use the clearfix pseudo-class

In addition to the clearfix technique and overflow attribute, you can also use the clearfix pseudo-class to clear floats. The following is a specific code example:

<style>
.clearfix:after {
  content: "";
  display: block;
  height: 0;
  clear: both;
  visibility: hidden;
}
.clearfix {
  zoom: 1;
}
</style>

<div class="clearfix">
  <div style="float: left; width: 50px; height: 50px; background-color: red;"></div>
  <div style="float: left; width: 50px; height: 50px; background-color: green;"></div>
</div>

In the above code, we added the clearfix class to the parent element div and set the style of clearfix::after. At the same time, in order to be compatible with lower versions of IE browsers, we also added the zoom: 1 style to clearfix. This clears the float so that the parent element correctly wraps the floated element.

Summary

Clearing floats is a common problem encountered in web page layout. By mastering some common methods of clearing floats, you can avoid layout confusion. This article introduces the method of clearing floats using clearfix techniques, overflow attributes and clearfix pseudo-classes, and gives specific code examples. I hope readers can solve the problems caused by floating layout through these methods.

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