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css what is float

青灯夜游

Release： 2023-01-04 09:34:27

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In CSS, floating is a method of taking an element out of the document flow. It will move the element to the left or right according to the value of float, and the elements around it will also be rearranged until its outer edge. until it hits the border of the containing box or another floated box.

css what is float

The operating environment of this tutorial: Windows 7 system, CSS3&&HTML5 version, Dell G3 computer.

Floating is a method of taking an element out of the document flow, moving it to the left or right and rearranging elements around it.

The meaning of floating: The element with the floating attribute set will break away from the control of the ordinary standard flow and move to the position specified in its parent element. If the block-level element is placed on a line, the floating will break away from the standard flow. It does not occupy a position and will affect the standard flow. Floating can only float left and right, not up and down.

Floating is a very useful layout method that can change the order in which objects on the page flow forward and backward. The advantage of this is that it makes the layout of the content simple and has good scalability.

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"> 
<style>
img 
{
	float:right;
}
</style>
</head>

<body>
<p>在下面的段落中，我们添加了一个 <b>float:right</b> 的图片。导致图片将会浮动在段落的右边。</p>
<p>
<img  src="logocss.gif"    style="max-width:90%"  style="max-width:90%" / alt="css what is float" >
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</p>
</body>

</html>

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css what is float

(Learning video sharing: css video tutorial)

Element floating characteristics:

1. Floating elements break away from the standard document flow and get rid of the restrictions of block-level elements and inline elements.

2. Floating elements have the effect of sticking to each other. When the width is not enough, an error message will appear. Automatic line wrapping

3. Although floating elements are separated from the standard document flow, they are not separated from the text flow, and will appear to be surrounded by words

Consequences caused by floating:

(1) Since the floating element is out of the document flow, the height of the parent element cannot be expanded, which affects elements at the same level as the parent element

(2) At the same level as the floating element The non-floating elements will follow, because the floating elements leave the document flow and do not occupy their original positions

(3) If the floating element is not the first floating element, the elements before it also need to be floated. Otherwise, it will easily affect the structural display of the page

, so the floats need to be cleared. So how to clear float? Recommended reading "How to clear floating in CSS? Introduction to 3 methods》

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