使用QRCode.js將url生成二維碼

插件下載地址：

https://static.runoob.com/assets/qrcode/qrcode.min.js

1. 普通用法

<div id="qrcode"></div>
<script type="text/javascript">
new QRCode(document.getElementById("qrcode"), "http://www.runoob.com"); </script>

2. 自定義樣式

<div id="qrcode"></div>
<script type="text/javascript">
var qrcode = new QRCode(document.getElementById("qrcode"), {
    text: "http://jindo.dev.naver.com/collie",
    width: 128,
    height: 128,
    colorDark : "#000000",
    colorLight : "#ffffff",
    correctLevel : QRCode.CorrectLevel.H
});
</script>