background-size sets the size of the background image_html/css

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background-size sets the size of the background image_html/css_WEB-ITnose

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Jun 24, 2016 am 11:51 AM

background-size

Set the size of the background image, displayed as length value or percentage, also Images can be retracted using cover and contain.

Syntax:

background-size: auto | <长度值> | <百分比> | cover | contain

Value description:

1. auto: Default value, does not change the original height and width of the background image;

2. : appear in pairs such as 200px 50px. Set the width and height of the background image to the first two values in sequence. When setting a value, use it as The image width value is proportionally scaled ; Set in turn to the value obtained by multiplying the width and height of the element by the previous percentage. When setting a value, the same as above;

4. cover: As the name suggests,

covers

, that is, The background image is scaled to to fill the entire container; 5. contain: Contain, that is, the background image is scaled to

one side close to the container To the edge

. Tips: You can enter your own code in the editing window on the right to try out the effects of different values.

<!DOCTYPE html><html><head> <meta charset="utf-8"><title>背景图片大小</title><style type="text/css">.demo {    background: url(http://static.mukewang.com/static/img/logo_index.png) no-repeat;    width: 300px;    height: 140px;    border: 1px solid #999;    background-size:cover;}</style>  </head> <body><div class="demo"></div></body></html>

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