When to use pseudo elements

Pseudo elements are used when inserting content, creating decorative effects, changing the style of elements, and creating animation effects. Detailed introduction: 1. Insert content. You can use pseudo elements to insert content before and after the element. This is very useful for some special design needs. You can use the ::before pseudo element to insert an icon or a piece of text in front of an element, so that you can Avoid adding extra tags in HTML to make the code more concise and easier to maintain; 2. Create decorative effects. Pseudo elements can also be used to create some decorative effects and so on.

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

Pseudo elements are an important concept in CSS that allow developers to insert content at specific locations in HTML elements without adding additional tags in HTML. Pseudo elements can be used to create some special effects, such as inserting content before and after the element, changing the style of the element, or inserting an icon at a certain position of the element. In this article, we'll discuss some common situations where pseudo-elements can be used to achieve specific effects.

1. Insert content: Use pseudo elements to insert content before and after elements, which is very useful for some special design needs. For example, we can use the ::before pseudo-element to insert an icon or a piece of text in front of an element. This avoids adding extra tags to the HTML, making the code more concise and easier to maintain.

2. Create decorative effects: Pseudo elements can also be used to create some decorative effects, such as inserting some decorative patterns or lines before and after elements. This can add some unique style and beauty to the web page and enhance the user's visual experience.

3. Change the style of the element: Pseudo elements can be used to change the style of the element, such as changing the background color, font style or border style of the element. This is very useful for some special design needs, such as adding a special style effect to a specific element, or adding a specific style to an element in a certain state.

4. Create animation effects: Pseudo elements can be used in conjunction with CSS animation effects to achieve some cool animation effects. For example, we can use pseudo-elements and CSS animation effects to create a blinking cursor, or display a gradient background color when the mouse is hovered, etc.

In short, pseudo-element is a very useful concept in CSS, which can help developers achieve some special effects without adding additional tags in HTML. By using pseudo elements, we can more flexibly control the style and content of elements, thereby achieving richer and unique design effects. Whether it is inserting content, creating decorative effects, changing the style of elements or creating animation effects, pseudo elements are a very useful tool that developers should learn and master in depth.

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