CSS动画keyframes简单样例

一、代码部分

1.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="style.css">
    <title>Document</title>
</head>
<body>
    <div class="circle1"></div>
    <div class="circle2"></div>
</body>
</html>

2.css

.circle1{
    width: 180px;
    margin-top: 20px;
    background-color: green;
    height: 180px;
    border-radius: 50%;
    animation: test 4.0s ease-in-out infinite alternate;
    text-align: center;
}

@keyframes test {
    0%{transform: translate(100px,100px);}
    20%{transform: translate(200px,200px);}
    50%{transform: translate(300px,300px);}
    80%{transform: translate(400px,200px);}
    100%{transform: translate(500px,100px);}
}


.circle2{
    margin: 50px;
    width: 180px;
    height: 180px;
    background: blue;
    animation: sample 2s ease-in-out infinite alternate;
}


@keyframes sample {
    
    0%{background: pink; transform:scale(1) rotate(0deg); }

    20%{
        background-color: red;
        transform: scale(1.2) rotate(90deg);
    }
    40%{
        background-color: green;
        transform: scale(1.2) rotate(135deg);
    }
    60%{
        background-color: blue;
        transform: scale(1.2) rotate(180deg);
    }
    80%{
        background-color: saddlebrown;
        transform: scale(1.2) rotate(225deg);
    }
    100%{background: red; transform:scale(1.2) rotate(270deg);}
}