文档：
https://github.com/davidshimjs/qrcodejs
<script src="./qrcode.js"></script> <div id="qrcode"></div> <script type="text/javascript"> var qrcode = new QRCode(document.getElementById("qrcode"), { text: "https://www.pengshiyu.com/", width: 128, height: 128, colorDark: "#000000", colorLight: "#ffffff", correctLevel: QRCode.CorrectLevel.H, }); </script>
</div>