一、js生成二维码有很多方法这里只写个人制作的一种
二、效果图
三、直接上代码
<!DOCTYPE html>
<html>
<head>
<title>Javascript 二维码生成库:QRCode</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta name="viewport" content="width=device-width,initial-scale=1,user-scalable=no" />
<script type="text/javascript" src="https://cdn.staticfile.net/jquery/2.1.1/jquery.min.js"></script>
<script type="text/javascript" src="https://lf9-cdn-tos.bytecdntp.com/cdn/expire-1-M/qrcodejs/1.0.0/qrcode.min.js"></script>
</head>
<body>
<input id="text" type="text" value="https://www.runoob.com" style="width:80%" /><br />
<div id="qrcode" style="width:100px; height:100px; margin-top:15px;"></div>
<script type="text/javascript">
var qrcode = new QRCode(document.getElementById("qrcode"), {
width : 100,
height : 100
});
function makeCode () {
var elText = document.getElementById("text");
if (!elText.value) {
alert("Input a text");
elText.focus();
return;
}
qrcode.makeCode(elText.value);
}
makeCode();
$("#text").
on("blur", function () {
makeCode();
}).
on("keydown", function (e) {
if (e.keyCode == 13) {
makeCode();
}
});
</script>
</body>
</html>
希望可以对大家有所帮助;