JS06-class对象

作者：小丑西瓜9 | 2024-03-21 15:40:37

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JS06-class对象

class对象

className

修改样式

<!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>
        div {
            width: 200px;
            height: 200px;
            background-color: aqua;
        }
        .action {
            width: 300px;
            height: 300px;
            background-color: pnik;
            margin-left: 100px;
        }
    </style>
</head>
<body>
    <div></div>
    <script>
        let box = document.querySelector('div')
        box.className = 'action'
    </script>
</body>
</html>
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classList

修改样式

<!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>
        div {
            width: 200px;
            height: 200px;
            background-color: aqua;
        }
        .action {
            width: 300px;
            height: 300px;
            background-color: pnik;
            margin-left: 100px;
        }
    </style>
</head>
<body>
    <div class="one"></div>
    <script>
        let box = document.querySelector('div')
        // add 追加
        box.classList.add('action')
        // remove 移除
        box.classList.remove('one')
        // 切换类
        box.classList.toggle('one')
    </script>
</body>
</html>
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修改表单属性

<!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>
</head>
<body>
    <input type="text" name="" id="" value="请输入">
    <button disabled>按钮</button>
    <input type="checkbox" name="" id="" class="agree">
    <script>
        let input = document.querySelector('input')
        input.value = '小米'
        input.type = 'password'
        let btn =document.querySelector('button')
        btn.disabled = true
        let checkbox = document.querySelector('.agree')
        checkbox.checked = true
    </script>
</body>
</html>
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间歇函数（定时器）

        setInterval(function(){
            console.log('color');
        },1000)
        function show (){
            console.log('Zero')
        }
        // 开启定时器
        let timer = setInterval(show,1000)

        // 清除定时器
        clearInterval(timer)
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