代码示例

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<!--
 * @Author: Han
 * @Date: 2021-10-27 17:34:01
 * @LastEditors: Han
 * @LastEditTime: 2021-10-27 17:36:35
 * @FilePath: \Projectc:\Users\Han\Desktop\Untitled-1.html
-->
<!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>一张图片或Div不同位置点击事件</title>
    <style>
        div {
            position: relative;
            margin: 100px auto;
            width: 332px;
            height: 332px;
            border: 1px solid black;
        }

        div::before,
        div::after {
            content: '';
            position: absolute;
            background: black;
        }

        div::before {
            height: 1px;
            width: 100%;
            top: 166px;
        }

        div::after {
            height: 100%;
            width: 1px;
            left: 166px;
        }
    </style>
    </style>
</head>

<body>
    <div>
    </div>
    <script>
        const btn = document.querySelector('div');
        btn.onclick = function (e) {
            alert(`点击了${e.offsetX >= 166 ? '右' : '左'}${ e.offsetY >= 166 ? '下' : '上'}`)
        };
    </script>
</body>

</html>