使min-height子元素height百分比生效的2种方式

方式1，使用flex

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <meta http-equiv="X-UA-Compatible" content="IE=edge">

    <meta name="viewport" content="width=device-width, initial-scale=1.0">

    <title>Document</title>

    <style>

        html, body {

            padding: 0;

            margin: 0;

            /* height: 2400px; */

            height: 100%;

            background: lightgray;

        }

        .body {

            display: flex;

            background: yellow;

            box-sizing: border-box;

            min-height: 600px;

            padding: 10px;

        }

        .child {

            flex-basis: 100px;

        }

        .childchild {

            height: 100%;

            background: red;

        }

    </style>

</head>

<body>

    <div class="body">

        <div class="child">

            <div class="childchild"></div>

        </div>

    </div>

</body>

</html>

这种方式若childchild高度超过child，会撑开child元素，若想childchild的高度不撑开child，用下面的方式

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <meta http-equiv="X-UA-Compatible" content="IE=edge">

    <meta name="viewport" content="width=device-width, initial-scale=1.0">

    <title>Document</title>

    <style>

        html, body {

            padding: 0;

            margin: 0;

            /* height: 2400px; */

            height: 100%;

            background: lightgray;

        }

        .body {

            display: flex;

            background: yellow;

            box-sizing: border-box;

            min-height: 600px;

            padding: 10px;

            flex-direction: column;

        }

        .child {

            flex-basis: 100px;

            flex-grow: 1;

            height: 0;

        }

        .childchild {

            height: 800px;

            background: red;

        }

    </style>

</head>

<body>

    <div class="body">

        <div class="child">

            <div class="childchild"></div>

        </div>

    </div>

</body>

</html>

方式2，使用grid

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <meta http-equiv="X-UA-Compatible" content="IE=edge">

    <meta name="viewport" content="width=device-width, initial-scale=1.0">

    <title>Document</title>

    <style>

        html, body {

            padding: 0;

            margin: 0;

            /* height: 2400px; */

            height: 100%;

            background: lightgray;

        }

        .body {

            display: grid;

            min-height: 600px;

            background: yellow;

            padding: 10px;

        }

        .child {

          height: 100%;

          background: red;

        }

    </style>

</head>

<body>

    <div class="body">

        <div class="child">

        </div>

    </div>

</body>

</html>

这种方式child也会撑开body

巴特西

使min-height子元素height百分比生效的2种方式

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