Html5第十二天练习-前端教程-前军教程网

Html：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>转动的风扇</title>
    <link rel="stylesheet" href="../css/20241114.css">
</head>
<body>
    <div class="main">
        <img src="image/20241114/fan-blade.png" alt="" srcset="">
        <button onclick="fanOn()">ON  </button>
        <button onclick="fanOff()">OFF</button>
        <button onclick="fanBtn1()">1</button>
        <button onclick="fanBtn2()">2</button>
        <button onclick="fanBtn3()">3</button>
    </div>
<script src="../js/20241114.js"></script>
</body>
</html>

Css:

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body{
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

img{
    padding: 50px;
    border-radius: 50%;
    animation: fananim linear infinite;
}

@keyframes fananim {
    100%
    {
        transform: rotate(360deg);
    }
}

button{
    width: 100px;
    height: 100px;
    padding: 20px 30px;
    margin: 0 20px;
    font-size: 25px;
    font-weight: 550;
    border: none;
    background-color: silver;
    border-radius: 50%;
    transition: 0.1s;

}

.main button:nth-last-child(5){
    background-color: rgb(0, 255, 0);
}

.main button:nth-last-child(4){
    background-color: rgb(255, 0, 0);
}

button:active{
    box-shadow: 0px 10px 10px black;
    transform: scale(0.95);
}

Js:

let fan_img = document.querySelector("img");

function fanOn(){
    fan_img.style.animationDuration = 3+"s";
}

function fanOff(){
    fan_img.style.animationDuration = 0+"s";
}

function fanBtn1(){
    fan_img.style.animationDuration = 1+"s";
}

function fanBtn2(){
    fan_img.style.animationDuration = 0.5+"s";
}

function fanBtn3(){
    fan_img.style.animationDuration = 0.1+"s";
}

通过按钮点击事件，调用JavaScript方法，风扇图片的动画会以 1 秒的持续时间进行播放。

animationDuration 属性定义了动画一个周期的持续时间

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Html5第十二天练习