找了一堆代码一堆GPT，终于给写对了：
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>QRCode Example</title><script src="https://cdn.jsdelivr.net/npm/qrcode/build/qrcode.min.js"></script>
</head>
<body><canvas id="canvas"></canvas> <!-- Canvas 元素 --><script>// 获取 canvas 元素const canvas = document.getElementById('canvas');// 使用 qrcode 库生成二维码QRCode.toCanvas(canvas, 'Hello World', function (error) {if (error) {console.error(error);} else {console.log('QR code successfully generated!');}});
</script></body>
</html>
