Some suggestions on how to write CSS

CSS is a crucial part of front-end development. It is responsible for the design of page layout, colors, fonts, etc. Correct CSS writing can make the page more beautiful and easier to read, and can also help improve the traffic and user experience of the web page. The following are some suggestions on how to write CSS:

1. Use of selectors

Selectors refer to symbols used to select HTML elements and apply styles to them. Commonly used selectors include ID selectors, class selectors, tag selectors, attribute selectors, etc. When using selectors, you should try to avoid using tag selectors, as tag selectors can have a negative impact on page performance. In comparison, ID selectors and class selectors are more efficient and precise, and can better optimize page loading speed.

2. Avoid using !important

!important is a property in the CSS language that can override other style declarations. However, excessive use of !important can make CSS code difficult to maintain, difficult to read, and may overwrite other style information. Therefore, we should try to avoid using !important unless necessary.

3. Follow CSS code conventions

When writing CSS code, you should follow certain conventions. For example: use indentation to indicate style hierarchy, use lowercase letters uniformly, etc. This can make the code more readable and maintainable, and also conform to the best practices of coding standards.

4. Use CSS preprocessor

CSS preprocessor is a tool used to enhance the CSS language and can help us write CSS code more efficiently. Common CSS preprocessors include Sass, Less, Stylus, etc. They provide many convenient functions, such as variables, functions, nesting, etc., which can greatly improve the efficiency of writing CSS.

5. Follow the HTTP request optimization principles

When writing CSS code, you should follow the HTTP request optimization principles. Specifically, it is to minimize the number of HTTP requests and make page requests faster. Some optimization methods include: merging CSS files into one file, compressing CSS files, placing CSS files at the top, etc.

6. Responsive design

Responsive design refers to web design that can adapt to different screen sizes and devices. When writing CSS, we should try to focus on responsive design. This can be achieved by using media queries, fluid layouts, etc.

In short, correct CSS writing can make the page more beautiful and easy to read, and it can also help improve the traffic and user experience of the web page. By following the above advice, we can write more efficient and elegant CSS code.

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