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JS 响应式布局

1、media

效果为屏幕宽度变化时,背景颜色也变化

<!DOCTYPE html><html lang="en"><head>    <meta charset="UTF-8">    <title>Title</title>    <style>        @media screen and (max-width: 1024px){            .bg{                background-color: aqua;            }        }        @media screen and (max-width: 980px) {            .bg {                background-color: red;            }        }        @media screen and (max-width: 720px) {            .bg {                background-color: yellow;            }        }        @media screen and (max-width: 640px) {            .bg {                background-color: green;            }        }        @media screen and (max-width: 320px) {            .bg {                background-color: darkgray;            }        }    </style></head><body class="bg"></body></html>

  

2. 弹性图片

样式如下面的code

 .img 和 img

<!DOCTYPE html><html lang="en"><head>    <meta charset="UTF-8">    <title>Title</title>    <style>        @media screen and (max-width: 1024px){            .bg{                background-color: aqua;            }        }        @media screen and (max-width: 980px) {            .bg {                background-color: red;            }            /*使用流体图片*/            img {               max-width: 100%;                height: auto;                width: auto\9; /* ie8 */                position: absolute;                width:600px;                top:-25%;            }            .img{                height: 200px;                border:1px solid sandybrown;                overflow:hidden;                margin-bottom:10px;               display: block;               position: relative;            }        }        @media screen and (max-width: 720px) {            .bg {                background-color: yellow;            }        }        @media screen and (max-width: 640px) {            .bg {                background-color: green;            }        }        @media screen and (max-width: 320px) {            .bg {                background-color: darkgray;            }        }    </style></head><body class="bg">  <div  style="margin-top: 300px" class="img">      <img src="http://www.mamicode.com/image/img1.jpg" />  </div></body></html>

  

JS 响应式布局