解决封装van-action-sheet组件背景元素仍可以滚动的问题使用css的pointer-events: none

使用css的pointer-events: none;属性即可解决。测试代码如下：

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .first {
            pointer-events: none;
            width: 200px;
            height: 200px;
            background-color: blueviolet;
            overflow-y: scroll;
        }

        .second {
            pointer-events: auto;
        }
    </style>
</head>

<body>
    <div>
        <div class="first">
            <a href="https://shefali.dev/blog">Click here</a>
            <div>1</div>
            <div>1</div>
            <div>1</div>
            <div>1</div>
            <div>1</div>
            <div>1</div>
            <div>1</div>
            <div>1</div>
            <div>1</div>
            <div>1</div>
            <div>1</div>
            <div>1</div>
            <div>1</div>
            <div>1</div>
            <div>1</div>
            <div>1</div>
            <div>1</div>
            <div>1</div>
            <div>1</div>
            <div>1</div>
            <div>1</div>
            <div>1</div>
            <div>1</div>
            <div>1</div>
            <div>1</div>
            <div>1</div>
            <div>1</div>
            <div>1</div>
            <div>1</div>
            <div>1</div>
        </div>
        <p class="second">
            Please <a href="https://shefali.dev/blog">Click here</a>
        </p>
    </div>
</body>

</html>