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"CSS Selector"

Source: Internet
Author: User
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1. Tag Selector

All of the tags will be added to this effect

<!DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" "Http://www.w3.org/TR/html4/loose.dtd "><HTML><Head>    <Metahttp-equiv= "Content-type"content= "Text/html;charset=utf-8">    <title>Tag Selector</title>    <styletype= "Text/css">P{font-size:40px;Color:Red;Font-weight:Bold;        }    </style></Head><Body>    <P>Test Text 1</P>    <P>Test Text 2</P></Body></HTML>

2. Class Selector

Class selectors can work on different label elements at the same time

<!DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" "Http://www.w3.org/TR/html4/loose.dtd "><HTML><Head>    <Metahttp-equiv= "Content-type"content= "Text/html;charset=utf-8">    <title>Class Selector</title>    <styletype= "Text/css">. Blue{font-size:40px;Color:Red;Font-weight:Bold;        }    </style></Head><Body>    <Pclass= "Blue">Test Text 1</P>    <H1class= "Blue">This is the H tag</H1>    <P>Test Text 2</P></Body></HTML>

Multiple class selectors can be used in a tag to achieve the effect of composite use,

<!DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" "Http://www.w3.org/TR/html4/loose.dtd "><HTML><Head>    <Metahttp-equiv= "Content-type"content= "Text/html;charset=utf-8">    <title>Class Selector</title>    <styletype= "Text/css">. Red{Color:Red;        }. Big{font-size:32px;        }    </style></Head><Body>    <Pclass= "Red">Red</P>    <Pclass= "Big">Big.</P>    <Pclass= "Red Big">The Big red.</P></Body></HTML>

3.id Selector

Each ID name can be used only once. The basic role of the ID selector is to define the unique elements that appear in each page.

<!DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" "Http://www.w3.org/TR/html4/loose.dtd "><HTML><Head>    <Metahttp-equiv= "Content-type"content= "Text/html;charset=utf-8">    <title>ID Selector</title>    <styletype= "Text/css">#red{Color:Red;        }#big{font-size:32px;        }    </style></Head><Body>    <PID= "Red">Red</P>    <PID= "Big">Big.</P></Body></HTML>

"CSS Selector"

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