CSS-过渡模块-CFANZ编程社区

过渡的三要素

必须要有属性 发生变化
必须告诉系统哪个属性需要执行过渡效果
必须告诉系统过渡效果的持续时长

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>过渡模块</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }

        div {
            width: 100px;
            height: 50px;
            background-color: red;
            /* 告诉系统哪个属性需要执行过渡效果 */
            transition-property: width, background-color;
            /* 告诉系统过渡效果的持续的时长 */
            transition-duration: 5s, 5s;

            /*
            transition-property: background-color;
            transition-duration: 5s;
            */
        }

        /* :hover 这个伪类选择器除了可以用在 a 标签上,还可以用在其它的任何标签上 */
        div:hover {
            width: 300px;
            background-color: blue;
        }
    </style>
</head>
<body>
<div></div>
</body>
</html>

注意点

当多个属性需要同时执行过渡效果时用逗号隔开即可，示例如下

transition-property: width, background-color;
transition-duration: 5s, 5s;

过渡模块的其它属性

transition-delay：告诉系统延迟多少秒之后才开始过渡动画
transition-timing-function：告诉系统过渡动画的运动的速度

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>过渡模块-其它属性</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }

        ul {
            width: 800px;
            height: 500px;
            margin: 0 auto;
            background-color: pink;
            border: 1px solid #000;
        }

        ul li {
            list-style: none;
            width: 100px;
            height: 50px;
            margin-top: 50px;
            background-color: blue;
            transition-property: margin-left;
            transition-duration: 10s;
        }

        ul:hover li {
            margin-left: 700px;
        }

        ul li:nth-child(1) {
            /* 告诉系统过渡动画的运动的速度 */
            transition-timing-function: linear;
        }

        ul li:nth-child(2) {
            transition-timing-function: ease;
        }

        ul li:nth-child(3) {
            transition-timing-function: ease-in;
        }

        ul li:nth-child(4) {
            transition-timing-function: ease-out;
        }

        ul li:nth-child(5) {
            transition-timing-function: ease-in-out;
        }
    </style>
</head>
<body>
<ul>
    <li>linear</li>
    <li>ease</li>
    <li>ease-in</li>
    <li>ease-out</li>
    <li>ease-in-out</li>
</ul>
</body>
</html>

过渡的连写格式

连写格式如下所示

transition: 过渡属性 过渡时长 运动速度 延迟时间;

过渡连写的注意点

和分开写一样, 如果想给多个属性添加过渡效果也是用逗号隔开即可
连写的时可以省略后面的两个参数, 因为只要编写了前面的两个参数就已经满足了过渡的三要素

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>过渡模块-连写</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }

        div {
            width: 100px;
            height: 50px;
            background-color: red;
            /*
            transition-property: width;
            transition-duration: 5s;
            transition: width 5s linear 0s,background-color 5s linear 0s;
            transition: background-color 5s linear 0s;
            transition: width 5s, background-color 5s, height 5s;
            */
            transition: all 5s;
        }

        div:hover {
            width: 300px;
            height: 300px;
            background-color: blue;
        }
    </style>
</head>
<body>
<div></div>
</body>
</html>

如果多个属性运动的速度 / 延迟的时间 / 持续时间都一样, 那么可以简写为如下所示的例子

transition: all 0s;

编写过渡的套路

不要管过渡, 先编写基本界面
修改我们认为需要修改的属性
再回过头去给被修改属性的那个元素添加过渡即可

弹性效果

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>过渡模块-弹性效果</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }

        div {
            height: 100px;
            background-color: red;
            margin-top: 100px;
            text-align: center;
            line-height: 100px;
        }

        div span {
            font-size: 80px;
            /*
            transition-property: margin;
            transition-duration: 3s;
            */
            transition: margin 3s;
        }

        div:hover span {
            margin: 0 20px;
        }
    </style>
</head>
<body>
<div>
    <span>BNTang</span>
    <span>handsome boy</span>
    <span>带</span>
    <span>你</span>
    <span>狂</span>
    <span>虐</span>
    <span>H</span>
    <span>5</span>
</div>
</body>
</html>

手风琴效果

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>过渡模块-手风琴效果</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }

        ul {
            width: 960px;
            height: 300px;
            margin: 100px auto;
            border: 1px solid #000;
            overflow: hidden;
        }

        ul li {
            list-style: none;
            width: 160px;
            height: 300px;
            background-color: red;
            float: left;
            /*
            border: 1px solid #000;
            box-sizing: border-box;
            transition-property: width;
            transition-duration: 0.5s;
            */
            transition: width 0.5s;
        }

        ul:hover li {
            width: 100px;
        }

        ul li:hover {
            width: 460px;
        }
    </style>
</head>
<body>
<ul>
    <li><img src="images/ad1.jpg" alt=""></li>
    <li><img src="images/ad2.jpg" alt=""></li>
    <li><img src="images/ad3.jpg" alt=""></li>
    <li><img src="images/ad4.jpg" alt=""></li>
    <li><img src="images/ad5.jpg" alt=""></li>
    <li><img src="images/ad6.jpg" alt=""></li>
</ul>
</body>
</html>