移動Web開發必備基礎之媒體查詢

時間 2020-03-16

標籤移動 web 開發必備基礎媒體查詢欄目無線简体版

原文原文鏈接

媒體類型：css

all （默認值）html

screen web

print 打印設備bootstrap

speech 屏幕閱讀器flex

因爲all是默認值可不寫，所以如下兩種寫法效果相同spa

@media all and (min-width:900px){

}


@media (min-width:900px){

}

媒體查詢中的邏輯scala

與或非code

@media (min-width:900px) and (max-width:1024px){

}

媒體特徵表達式htm

width / max-width / min-witdhblog

-webkit-device-pixel-ratio / -webkit-max-device-pixel-ratio / -webkit-min-device-pixel-ratio

orientation: landscape / portrait 橫屏 / 豎屏

媒體查詢-策略

移動端斷點（參考bootstrap）

xs <576px 1

sm 576~768px 2

md 768~992px 4

lg 992~1200px 6

xl >1200px 12

後面的條件知足時，會覆蓋前面的條件

PC first

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width,initial-scale=1,user-scalable=no,maximum-scale=1,minimum-scale=1">
    <title>Document</title>
    <link rel="stylesheet" href="font/iconfont.css">
    <style>
        *{margin:0;padding:0;box-sizing:border-box;}
        img{width:100%;}
        .row{width:100%;display: flex;flex-wrap:wrap;}

        /*pc first*/
        .col{width:8.33%;}
        @media (max-width:1200px){
            .col{width:16.67%;}
        }
        @media (max-width:992px){
            .col{width:25%;}
        }
        @media (max-width:768px){
            .col{width:50%;}
        }
        @media (max-width:576px){
            .col{width:100%;}
        }

    </style>
</head>
<body>
    <div class="row">
        <div class="col">
            <img src="img/cyy.jpg">
        </div>
        <div class="col">
            <img src="img/cyy.jpg">
        </div>
        <div class="col">
            <img src="img/cyy.jpg">
        </div>
        <div class="col">
            <img src="img/cyy.jpg">
        </div>
        <div class="col">
            <img src="img/cyy.jpg">
        </div>
        <div class="col">
            <img src="img/cyy.jpg">
        </div>
        <div class="col">
            <img src="img/cyy.jpg">
        </div>
        <div class="col">
            <img src="img/cyy.jpg">
        </div>
        <div class="col">
            <img src="img/cyy.jpg">
        </div>
        <div class="col">
            <img src="img/cyy.jpg">
        </div>
        <div class="col">
            <img src="img/cyy.jpg">
        </div>
        <div class="col">
            <img src="img/cyy.jpg">
        </div>
    </div>
</body>
</html>

mobile first

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width,initial-scale=1,user-scalable=no,maximum-scale=1,minimum-scale=1">
    <title>Document</title>
    <link rel="stylesheet" href="font/iconfont.css">
    <style>
        *{margin:0;padding:0;box-sizing:border-box;}
        img{width:100%;}
        .row{width:100%;display: flex;flex-wrap:wrap;}

        /*mobile first*/
        .col{width:100%;}
        @media (min-width:576px){
            .col{width:50%;}
        }
        @media (min-width:768px){
            .col{width:25%;}
        }
        @media (min-width:992px){
            .col{width:16.67%;}
        }
        @media (min-width:1200px){
            .col{width:8.33%;}
        }

    </style>
</head>
<body>
    <div class="row">
        <div class="col">
            <img src="img/cyy.jpg">
        </div>
        <div class="col">
            <img src="img/cyy.jpg">
        </div>
        <div class="col">
            <img src="img/cyy.jpg">
        </div>
        <div class="col">
            <img src="img/cyy.jpg">
        </div>
        <div class="col">
            <img src="img/cyy.jpg">
        </div>
        <div class="col">
            <img src="img/cyy.jpg">
        </div>
        <div class="col">
            <img src="img/cyy.jpg">
        </div>
        <div class="col">
            <img src="img/cyy.jpg">
        </div>
        <div class="col">
            <img src="img/cyy.jpg">
        </div>
        <div class="col">
            <img src="img/cyy.jpg">
        </div>
        <div class="col">
            <img src="img/cyy.jpg">
        </div>
        <div class="col">
            <img src="img/cyy.jpg">
        </div>
    </div>
</body>
</html>