What is the use of css styles?

The functions of css style: 1. Beautify the web page and make the page truly pleasing to the eye; 2. Simplify the format code of the page, speed up the loading speed, and reduce the amount of code that needs to be uploaded; 3. Avoid page-by-page modifications , shortening the time to modify the page.

The operating environment of this tutorial: Windows 7 system, CSS3 version, Dell G3 computer.

Before CSS, almost all presentation properties of an HTML document were contained in HTML markup (especially in HTML tags); all font colors, background styles, element alignment, borders, and sizes had to be in HTML explicit description.

As a result, the development of large websites becomes a long and expensive process as style information is added repeatedly to every page of the website.

In order to solve this problem, the World Wide Web Consortium (W3C) introduced CSS in 1996 and maintained its standards. CSS aims to achieve separation of presentation and content. Web designers can now move a web page's formatting information into a separate style sheet, which makes HTML markup simpler and more maintainable.

CSS is a computer language used to express document styles such as HTML (an application of Standard Generalized Markup Language) or XML (a subset of Standard Generalized Markup Language). The latest version of CSS is CSS3, which is a style design language that can truly separate web page performance and content. (Learning video sharing: css video tutorial)

CSS is mainly used to design the style of web pages and beautify web pages; it can not only statically modify web pages, but also dynamically coordinate with various script languages. Format various elements of the web page.

CSS can perform pixel-level precise control over the layout of element positions in web pages, supports almost all font size styles, and has the ability to edit web page objects and model styles.

Using CSS technology when making web pages can effectively achieve more precise control over the layout, fonts, colors, backgrounds and other effect attributes that have common properties across the entire site.

As long as you make some simple modifications to the corresponding CSS code in the HTML of the web page, you can change the appearance and formatting style of the same page or the entire site that uses this "select class".

The functions of css:

1. Beautify the web page; make the fonts on the page more beautiful, easier to arrange, and make the page truly pleasing to the eye.

2. The format code of the page is simplified. The external style sheet will also be saved in the cache by the browser, which speeds up the loading speed and reduces the amount of code that needs to be uploaded.

3. As long as you modify the CSS style sheet file that saves the website format, you can change the style and features of the entire website. This plays an important role for large websites and multi-page websites. This avoids page-by-page modifications and shortens the time for page modifications.

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