What is CSS and what is its main role

CSS refers to Cascading Style Sheets, a computer language used to express file styles such as HTML or XML. It is a style language that can separate web pages and content. Its function is: it can effectively achieve more precise control over the layout, fonts, colors, backgrounds and other effects of the page; it can make the fonts on the page more beautiful and easier to arrange.

The operating environment of this tutorial: Windows 7 system, CSS3&&HTML5 version, Dell G3 computer.

CSS (Cascading Style Sheets), it is a computer language used to express file styles such as HTML or XML. It is a programming language used to express html styles. It can be done A style language that separates web pages and content.

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 format various elements of web pages in conjunction with various scripting languages.

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.

The role of CSS

(1) Can be used on almost all browsers.

(2) Some functions that had to be implemented through image conversion in the past can now be easily implemented using CSS, thereby downloading the page faster.

(3) Make the fonts on the page more beautiful and easier to arrange, making the page truly pleasing to the eye.

(4) You can easily control the layout of the page.

(5) You can update the styles and formats of many web pages at the same time, instead of updating them page by page. You can use a CSS file to control the style of all web pages on the site. As long as the corresponding lines in the CSS file are modified, all pages of the entire site will change accordingly.

[Recommended tutorial: CSS video tutorial]

Think about it, how did we control the color and size of fonts and the fonts used before using CSS? We generally use HTML tags to achieve this, and the code is very cumbersome. It is hard to imagine that if the font color and size need to be changed frequently on a page, the length of the HTML code generated must be bloated.

To be honest, CSS was born to simplify such work. Of course, its function is by no means that simple. Combining div css is to control the style attributes of the entire page through the idea of ​​style control of the page structure. The browser renders CSS properties through CSS class interpretation to express the style set in the style.

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