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