UI状态伪类选择器

news2024/11/25 22:27:59

1.div::selection{background:yellow;color: red; }

鼠标选中后高亮状态的样式

<!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::selection{
            /* 鼠标选中后高亮状态的样式 */
            background:yellow;
            color: red;
        }
    </style>
</head>
<body>
    <div>Lorem ipsum dolor sit amet consectetur adipisicing elit. Placeat nisi officiis iusto, cupiditate consequuntur voluptatibus quae, architecto et quam dolorem eum rerum, veniam minima. Eveniet delectus hic id animi adipisci?</div>
</body>
</html>

2.:checked”表示的是选中状态

<!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>
        input:checked{
            background: green;
        }
        input[type=checkbox]{
            /* checkbox比较特殊有默认样式，所以要先去掉默认样式 */
            appearance:none;
            width: 30px;
            height: 30px;
            border: 1px solid red;
        }
    </style>
</head>
<body>
    <form action="">
        用户名：<input type="text"><br>
        密码：<input type="password"><br>
        记住用户名：<input type="checkbox"><br>
        <input type="submit" >
    </form>
</body>
</html>

3.:disabled该元素无法被选中时候背景变成绿色

input:disabled{background: green;}

<!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>
        input:disabled{
            /* 该元素无法被选中 */
            background: green;
        }
 
    </style>
</head>
<body>
    <form action="">
        用户名：<input type="text"><br>
        密码：<input type="password"><br>
        记住用户名：<input type="checkbox"><br>
        <input type="submit" disabled>
    </form>
</body>
</html>

4.该元素可用状态的时候生效

input:enabled{background: green;}

用户名密码可以输入所以背景是绿色的

<!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>
        input:enabled{
            /* 该元素可用状态的时候生效 */
            background: green;
        }
 
    </style>
</head>
<body>
    <form action="">
        用户名：<input type="text"><br>
        密码：<input type="password"><br>
        记住用户名：<input type="checkbox"><br>
        <input type="submit" disabled>
    </form>
</body>
</html>