jquery 半圆形仪表盘

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>jQuery半圆形仪表盘</title>
    <style>
        .gauge {
            width: 200px;
            height: 100px;
            background-color: #eee;
            border-radius: 100px 100px 0 0;
            position: relative;
            overflow: hidden;
        }
        .gauge .progress {
            width: 200px;
            height: 200px;
            background-color: #f00;
            border-radius: 100px;
            position: absolute;
            bottom: 0;
            transform-origin: bottom center;
        }
    </style>
</head>
<body>
    <div class="gauge">
        <div class="progress" style="transform: rotate(180deg);"></div>
    </div>
    <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
    <script>
        $(function() {
            var value = 75; // 示例值，范围0-100
            var degrees = value * 3.6; // 将值转换为角度
            $('.progress').css('transform', 'rotate(' + degrees + 'deg)');
        });
    </script>
</body>
</html>