What are the float attributes?

float attributes include left, right, none, inherit, etc. Detailed introduction: 1. left, the element floats to the left. When set to left, the element will break away from the normal document flow, float to the left, and allow other elements to be displayed on its right side; 2. right, the element floats to the right, and left Similarly, when set to right, the element will break away from the normal document flow, float to the right, and allow other elements to be displayed on its left side; 3. none, the element will not float, and when set to none, the element will return to normal, etc.

The operating system for this tutorial: Windows 10 system, DELL G3 computer.

The floating attribute (float) is one of the commonly used attributes in CSS and is used to control the floating position of elements on the page. By setting the element's float property, you can take the element out of the document flow and position it freely on the page. This article will introduce the various values ​​​​of the float attribute and their usage.

The float attribute has the following values:

1. left: The element floats to the left. When set to left, the element will break away from the normal document flow, float to the left, and allow other elements to be displayed to its right. If the page is not wide enough to accommodate the floating element, it will wrap automatically.

2. right: The element floats to the right. Similar to left, when set to right, the element will break away from the normal document flow, float to the right, and allow other elements to be displayed to its left. If the page is not wide enough to accommodate the floating element, it will wrap automatically.

3. none: The element does not float. When set to none, the element will return to normal document flow layout and will not float. It's the default value.

4. inherit: Inherit the floating attribute of the parent element. When set to inherit, the element will inherit the float attribute of the parent element. If the parent element does not set the float attribute, it is the same as none.

Layout features of floating elements:

- Floating elements will automatically shrink to the width of their content and will not occupy the entire width of the parent element.

- Floated elements are placed as close to the left or right side of their container as possible, adjacent to other floated elements.

- If the width of the floated element exceeds the width of the parent element, it will wrap automatically.

- Floated elements are taken out of the normal document flow, so subsequent non-floated elements fill the empty space left by the floated elements.

Application scenarios of floating elements:

1. Implement multi-column layout: By setting multiple elements as floating elements, you can achieve multi-column layout. For example, setting multiple div elements to float: left can arrange them horizontally in a row.

2. Surrounding effect of pictures and text: By setting the picture as a floating element, you can achieve the effect of text wrapping around the picture.

3. Navigation menu: By setting the list items of the navigation menu as floating elements, you can achieve a horizontally arranged navigation menu.

4. Responsive layout: In responsive design, by setting floating attributes under different screen sizes, the adaptive layout of the page on different devices can be achieved.

It should be noted that floating elements may cause the height of the parent element to collapse, that is, the parent element cannot automatically expand to accommodate the floating element. To solve this problem, you can add a clearfix class to the parent element or use other methods to clear floats.

Summary:

The float attribute is a commonly used layout attribute in CSS. By setting the float attribute, you can achieve free positioning of elements and multi-column layout effects. Its values ​​are left, right, none and inherit, which respectively indicate floating to the left, floating to the right, not floating and inheriting the floating attribute of the parent element. Floating elements can achieve a variety of layout effects, but you need to pay attention to the problem that may cause the height of the parent element to collapse.

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