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javascript - transition height auto transition animation
大家讲道理
大家讲道理 2017-05-16 13:21:31
0
3
765

1. Why is there no animation effect when shrinking?

2.Code

<!DOCTYPE html>
<html lang="en">

<head>
    <title></title>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <style>
        * {
            transition: all .6s;
        }

        .container {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 100px;
            max-height: 100px;
            width: 100px;
            margin: 5px auto;
            background: RGBA(0, 43, 54, 0.80);
            overflow: hidden;
            text-align: center;
        }

        .container:hover {
            height: auto;
            max-height: 100%;
            bottom: 0px;
        }
    </style>
</head>

<body>
    <p class="sketch">
        <p class="container">
            <!--<a id="switch" href="javascript:void(0)">开关</a>-->
        </p>
    </p>
    <!--<script>
        const classList = document.querySelector('.container').classList;
        document.querySelector('#switch').addEventListener('click', function (e) {
            if (classList.contains('expand')) {
                document.querySelector('.container').classList.remove('expand');
            } else {
                document.querySelector('.container').classList.add('expand');
            }
        });
    </script>-->
</body>

</html>

3. Online Demo (solved)

大家讲道理
大家讲道理

光阴似箭催人老，日月如移越少年。

reply all(3)
左手右手慢动作
左手右手慢动作2017-05-16 13:23:31 3 floor

Because the transition animation we can see is actually the changing process of the height value, and you did not assign a clear value to height in the hover attribute, so after moving the mouse out, the browser actually I don’t know which value to change from to the initial value, so I just return to the initial value directly, so there is no transition effect

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刘奇
刘奇2017-05-16 13:23:31 2 floor

The reason is as mentioned on the 1st floor. Can be set height:100%;.

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伊谢尔伦
伊谢尔伦2017-05-16 13:23:31 1 floor 
.container:hover {
    height: 100%; // 这个要明确值
    max-height: 100%;
    bottom: 0px;
}
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