实例代码“Ctrl+/”提示“F11/ESC”全屏 返回 格式化 恢复 运行
AخA
 
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<!DOCTYPE html>
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<html>
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    <head>
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        <meta charset="utf-8">
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        <title>手册网(www.shouce.ren)
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        </title>
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        <style>
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            .parent {
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                width: 200px;
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                height: 150px;
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                background-color: black;
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                display: flex;
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                flex-flow: row wrap;
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                align-content: flex-start;
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            }
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            .child {
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                box-sizing: border-box;
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                background-color: white;
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                flex: 0 0 25%;
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                height: 50px;
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                border: 1px solid red;
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            }