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HTML5基礎加強css樣式篇(背景圖大小設定:background-size)(三十九)

1.background-size屬性:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
    <style type="text/css">
        .box {
            margin: 200px 0 0 200px;
            width: 200px;
            height: 200px;
            background-color: orange;
            background-image: url("img/img11.jpg");

            /*設定背景圖大小*/
            /*background-size: x y;*/
            background-size: 100% 100%;
            background-size: 200px 200px;
            background-size: 50% 50%;
            background-size: 50%;

        }

        .box:hover {

        }
    </style>
</head>
<body>

<div class="box"></div>

<script type="text/javascript">
</script>
</body>
</html>

2.background-size:屬性值關鍵字:
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title></title>
    <style type="text/css">
        .box {
            margin: 200px 0 0 200px;
            width: 800px;
            height: 600px;
            background-color: orange;
            background-image: url("img/img16.jpg");


            /*試用關鍵字控制圖片大小*/

            background-repeat: no-repeat;

            /*background-size: cover;*/
            background-size: 100% 100%;
            /*基於元素最大的邊計算背景圖的大小*/
            background-size: cover;
            /*基於元素最小的邊計算背景圖的大小

                1.背景圖原來的寬高比
                2.確保在元素中全部顯示*/
            background-size: contain;


        }

        .box:hover {

        }
    </style>
</head>
<body>

<div class="box"></div>

<script type="text/javascript">
</script>
</body>
</html>