jquery.qrcode如何切换新的二维码

//清空旧的二维码
$(“#qrcodeDy”).html(“”);
//生成新的二维码
$(“#qrcodeDy”).qrcode({
render: “canvas”,
text:res.data
});
setTimeout(function(){
KaTeX parse error: Expected 'EOF', got '#' at position 3: ("#̲dyQrcode").attr…(“#qrcodeDy”).find(“canvas”)[0].toDataURL(“image/jpeg”));
openQrcode(“体验二维码”);
},100);