Introduction to CSS
SS ( C ascading Style Sheet , Cascading Style Sheet) defines how to display HTML elements.
When the browser reads a style sheet, it formats (renders) the document according to the style sheet.
CSS syntax:
Every CSS style consists of two components: selectors and declarations. Declarations in turn include properties and property values. End each statement with a semicolon.
CSS comments
/* The middle is the comment section */
How to import CSS
<link href="mystyle.css" rel="stylesheet" type="text/css"/>
CSS selectors
Element selector:
p {color: "red";}
#p label color is red
ID selector:
#id
{ background-color: red; }
The background color of the #id tag is red
Class selector:
.c1 { font-size: 14px; }
p.c1 {
color: red;
}
#1 The font size of the label with the .c1 style class is 14px
#2. The color of the label with the .c1 style class in the p tag is set to red
Notice:
Do not start the style class name with a number (some browsers do not recognize it).
If there are multiple class attributes in the tag, they should be separated by spaces .
Universal selector:
* { color: white; }
#Set the color of all css tags to white