What is the use of adding pseudo elements?

Adding pseudo elements can be used to create decorative effects, achieve specific layout effects, create interactive effects, modify specific element states and create some special effects, etc. Detailed introduction: 1. Create decorative effects. By setting the content attributes and styles of the :before or :after pseudo-element, you can insert icons, shapes or other decorative elements before or after the element, so that you can add more elements to the web page. Visual appeal and personalization; 2. Achieve specific layout effects, which can be created through :before and :after pseudo-elements, etc.

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

Plus pseudo elements have many uses in web design and development. Pseudo-element is a special selector in CSS that allows us to insert additional content before or after the content of an element and control it through CSS styles.

First of all, pseudo elements can be used to create decorative effects. By setting the content attribute and style of the :before or :after pseudo-element, we can insert icons, shapes, or other decorative elements before or after the element. This adds more visual appeal and personalization to the web page.

Secondly, pseudo-elements can be used to achieve specific layout effects. For example, using the :before and :after pseudo-elements you can create a three-column layout where the middle column has a background color and the left and right columns are transparent. This layout effect can be used to create the navigation bar, header or footer of a web page, etc.

In addition, pseudo elements can also be used to create interactive effects. Through the :before and :after pseudo-elements, we can change the style of the element when the mouse is hovered or clicked, thereby achieving some dynamic effects. For example, when the mouse is hovering over a button, we can use the :before pseudo-element to add a shadow effect to enhance the visual feedback of the button.

In addition, pseudo-elements can also be used to modify specific element states. Through the :before and :after pseudo-elements, we can change the style of the element based on its state. For example, when a checkbox is selected, we can use the :before pseudo-element to add a check icon to indicate its selected state.

Finally, pseudo-elements can also be used to create some special effects, such as using :before and :after pseudo-elements to create a mirror or reflection effect of an element. This effect can add some unique visual effects to the web page, making it more vivid and interesting.

In short, adding pseudo elements can provide more creativity and flexibility for web design and development. By using the :before and :after pseudo-elements, we can implement various decorative, layout, interactive and special effects to enhance the visual appeal and user experience of the web page.

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