[Javaweb Basics] 028.CSS Introduction and basic syntax

CSS Overview

• CSS refers to cascading style sheets (Cascading style sheets)
• Style defines how HTML elements are displayed
• Styles are typically stored in style sheets
• Add a style to HTML 4.0 to solve the problem of separating content from performance
• external style sheets can greatly improve productivity
• External style sheets are typically stored in CSS files
• Multiple style definitions can Cascade to a

Precedence of CSS

• Browser default settings
• External style sheet
• Internal style sheet (inside the
• Inline style (inside HTML elements)

basic syntax for CSS

• Code structure

• The wording of the color

p {color: #ff0000 ;}, p {color: #f00 ;} and P {color: rgb(100%,0%,0%) ;} Is the right thing to do.

• Value is a number of words remember quotation marks

P {font-family: "sans serif" ;}

• Each line describes only one property

p {
Text-align:center;
Color:black;
font-family:arial;
}

• Spaces and case

Most style sheets contain more than one rule, and most rules contain more than one declaration. The use of multiple declarations and spaces makes it easier to edit a style sheet:

　  Body {  color: #000;  Background: #fff;  margin:0;  padding:0;  Font-family:georgia, Palatino, serif;   }

The inclusion of spaces does not affect how the CSS works in the browser, and, unlike XHTML, the CSS is not sensitive to casing. However, there is one exception: class and ID names are sensitive to capitalization if they involve working with HTML documents.

　　

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reprinted from "Baby bus Superdo team" original link: http://www.cnblogs.com/superdo/p/5023602.html

[Javaweb Basics] 028.CSS Introduction and basic syntax