What are the characteristics of css

CSS (Cascading Style Sheets) is a style sheet language for HTML documents. It defines how HTML elements appear. In web design, CSS is widely used to make web pages beautiful and easy to read and understand. The following are several characteristics of CSS:

1. Cascading and inheritance

The C in CSS refers to Cascading, and the style rules in the style sheet can Overlay or overlap each other based on level and specificity. The cascading mechanism of CSS defines the priority relationship between various style rules, so that the style rules are applied to elements in the document according to the predetermined priority. At the same time, CSS also has inheritance, that is, the style applied to an element can be inherited by its descendant elements and overridden or superimposed on it. In this way, once a certain element is styled, it can reduce the writing of repeated code and improve development efficiency.

2. Develop standardized styles

In actual development, we sometimes need to unify the style effects on different browsers. At this time, we can use the "normalize style sheet (normalize.css)" method. The normalized style sheet is similar to the reset style sheet, but instead of resetting all styles, it standardizes the default styles of all browsers to form unified style rules to ensure the compatibility of styles on different browsers.

3. Responsive design

CSS has the characteristics of responsive design, which can make the page adapt to different screen sizes on different devices. The key to responsive design is media queries in CSS. Media queries are a flexible way to set different style rules based on different screen sizes, device types, resolutions, etc. When the page is rendered on different screens, the style specified by the media query will automatically match the size of the screen to achieve responsive design of the page.

4. Animation effects

CSS can also be used to create animation effects. Using CSS animation can make the page more vivid and improve the user experience. CSS provides a variety of animation effect properties and methods, such as transition, animation, transform, etc. Through CSS animation, different animation effects can be achieved, such as gradient, rotation, scaling, fade-in and fade-out, etc., thereby enriching the presentation of the page.

5. Modular development

CSS modular development refers to classifying style rules according to different functions or uses and introducing them as needed during the development process. Through modular development, the writing of style sheets can be made more concise and efficient, and the maintainability of the code can be improved. Modular development is not only suitable for large-scale projects, but is applicable to projects of any scale.

The above are several important features of CSS. With the help of CSS, you can add more styles and dynamic effects to the page, thereby providing users with a more exciting experience.

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