BFC

BFC

BFC（Box Formatting Context）

Body 根元素
Display 为 table、flex、inline-box
overflow 不为visible
Float 不为none
Position 为absolute、fixed

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        .container-1{
            padding-left:300px;
            background:cadetblue;
            overflow: hidden;
        }

        .container-1 .left{
            float: left;
            width:300px;
            margin-left:-300px;
            background:burlywood;
            height: 200px;
        }

        .container-1 .right{
            background:aliceblue;
        }

    </style>
</head>
<body>
    <div class="container-1">
        <div class="left">left</div>
        <div class="right">right</div>
    </div>
</body>
</html>

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