The gap between page elements and the page

Source: Internet
Author: User

When we make a page, the default page element has a small gap between the top and bottom of the page. As shown below:

<!DOCTYPE HTML><HTMLLang= "en"><Head>    <MetaCharSet= "UTF-8">    <title>Triangle</title></Head><style>. Three{width:100px;Height:100px;Border-style:Solid;Border-width:1px;    }</style><Body>    <Divclass= "three">            </Div></Body></HTML>

The effect is as follows:

This is because in the box model, the default body and the entire page margin is not 0, the body margin is set to 0px to eliminate the gap. As shown below:

<!DOCTYPE HTML><HTMLLang= "en"><Head>    <MetaCharSet= "UTF-8">    <title>Triangle</title></Head><style>. Three{width:100px;Height:100px;Border-style:Solid;Border-width:1px;    }Body{margin:0px;    }</style><Body>    <Divclass= "three">            </Div></Body></HTML>

The effect is as follows:

The gap between page elements and the page

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