JavaScript-generate QR code-qrcode

introduce

QRCode.js is a JavaScript library for generating QR codes. It is mainly obtained by obtaining DOM tags, and then
drawn through HTML5 Canvas, without relying on any library.

Basic usage of qrcode

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

Or
qrcdoe.toDataUrl needs to pass a string, this function executes and returns a Promise

let imgUrl = await qrcode.toDataURL(this.payInfo.codeUrl)

Generate QR code parameters

var qrcode = new QRCode("test", {
    
    
    text: "http://www.runoob.com",
    width: 128,
    height: 128,
    colorDark : "#000000",
    colorLight : "#ffffff",
    correctLevel : QRCode.CorrectLevel.H
});

operate

qrcode.clear(); 清除

qrcode.makeCode("http://naver.com"); 再次生成