Reasons: 1. It facilitates division of labor and collaboration in web design. For example, the html part is completed by one person or a team, the js program part is also completed by a group of people, and the css is also left to professionals. In this way It can improve efficiency; 2. CSS can be reused, which can greatly reduce the amount of code on the web page and improve the transmission efficiency of the web page.
The operating environment of this tutorial: Windows 7 system, css3 version. This method is suitable for all brands of computers.
Recommended: "css Video Tutorial"
CSS (Cascading Style Sheet, which can be translated as "cascading style sheet" or "cascading style sheet") is a set of Formatting rules that control the appearance of web pages. By formatting a page using CSS styles, you can separate the content of the page from its presentation.
CSS was first approved and recommended for use by W3C in 1996. The latest version of CSS is CSS3, which is a style design language that can truly separate web page performance and content.
Compared with the performance of traditional HTML, CSS can perform pixel-level precise control over the position and layout of objects in web pages, supports almost all font size styles, and has the ability to edit web page objects and model styles. , and can carry out preliminary interaction design. It is currently the best performance design language based on text display.
The reasons for using css styles in web design:
This is mainly to facilitate the division of labor and collaboration in web design. For example, the html part is done by one person or a team. Completed, the js program part is also completed by a group of people, and the css is also left to professionals, which will definitely improve efficiency. Just like decorating a house, both hard and soft decoration are done by professional engineering teams, which will definitely improve the efficiency. Done quickly and well. On the contrary, if all the work is handed over to an engineering team, the quality and construction schedule cannot be guaranteed.
In addition, the css style sheet of a web page can be used intact by another web page or even web pages on other websites. This means that the css can be reused, which can greatly reduce the amount of code on the web page. , improve the efficiency of web page transmission, and also enable the website to maintain a uniform appearance. Of course, it also reduces the work intensity of web designers. This is just like the decoration style of one house can be completely copied to another house with similar structure. This can not only reduce the cost of house decoration, but also keep the house with a unified decoration style.
What CSS can do
CSS is used to enhance or control the style of a web page and allows the separation of style information from the content of the web page. The purpose of referencing a style sheet is to separate "web page structure code" and "web page style code" so that web designers can have more control over web page layout. Using style sheets, all web pages on the entire site can be pointed to a certain CSS file. The designer only needs to modify a certain line in the CSS file, and the corresponding styles on the entire web page will change accordingly.
Limitations of CSS
CSS has so many functions, does it mean that it is omnipotent and can achieve anything freely?
1. Properties cannot be inherited
Of course not. CSS still has the problem that some properties cannot be inherited, such as the border attribute, which is used to set the border of an element and has no inheritance. Most background and border properties, such as padding and margin, cannot be inherited.
2. Inconsistent display effects
In addition, when using CSS to specify the appearance of specific elements, static HTML can be perfectly supported, but for server elements in dynamic websites, there are still differences in different browsers. Output inconsistency problem.
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