代码：
<html>
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>scan</title>
<style>
button {
display: block;
width: 100%;
margin: 6px;
outline: none;
height: 40px;
line-height: 40px;
color: #fff;
background-color: #26a2ff;
text-align: center;
border-radius: 4px;
border: none;
cursor: pointer;
}
#qr-input-file {
opacity: 0;
filter: alpha(opacity=0);
display: inline-block;
width: 100%;
height: 100%;
}
#upload-text {
position: relative;
bottom: 40px;
user-select: none;
}
</style>
<script src="~/easyui/jquery.min.js"></script>
<script src="~/scan/html5-qrcode.min.js"></script>
</head>
<body>
<button id="refresh">刷新</button>
<button id="scan">使用相机扫一扫方式</button>
<button id="useLocal">
<input type="file" id="qr-input-file" accept="image/*" value="使用文件方式">
<span id="upload-text">使用文件方式</span>
</button>
<H3 id="readResult"></H3>
<div id="reader" width="600px"></div>
</body>
<script>
function onScanSuccess(decodedText, decodedResult) {
$('#readResult').html(decodedText + ":" + decodedResult);
}
function onScanFailure(error) {
$('#readResult').html(error);
}
$(function () {
$('#refresh').click(function () {
location.reload();
});
$('#scan').click(function () {
$('#readResult').html("");
const html5QrCode = new Html5Qrcode("reader");
const qrCodeSuccessCallback = (decodedText, decodedResult) => {
/* handle success */
$('#readResult').html("扫描成功：" + decodedText);
//关闭摄像头
html5QrCode.stop().then((ignore) => {
// QR Code scanning is stopped.
}).catch((err) => {
// Stop failed, handle it.
});
};
const config = { fps: 10, qrbox: { width: 250, height: 250 } };
// If you want to prefer front camera
//html5QrCode.start({ facingMode: "user" }, config, qrCodeSuccessCallback);
// If you want to prefer back camera
html5QrCode.start({ facingMode: "environment" }, config, qrCodeSuccessCallback);
// Select front camera or fail with `OverconstrainedError`.
//html5QrCode.start({ facingMode: { exact: "user"} }, config, qrCodeSuccessCallback);
// Select back camera or fail with `OverconstrainedError`.
//html5QrCode.start({ facingMode: { exact: "environment"} }, config, qrCodeSuccessCallback);
})
//选择文件扫描
$('#qr-input-file').change(function (e) {
$('#readResult').html("");
const html5QrCode = new Html5Qrcode("reader");
if (e.target.files.length == 0) {
// No file selected, ignore
return;
}
const imageFile = e.target.files[0];
// Scan QR Code
html5QrCode.scanFile(imageFile, true)
.then(decodedText => {
// success, use decodedText
//console.log(decodedText);
$('#readResult').html(decodedText);
$('#qr-input-file').val('');
})
.catch(err => {
// failure, handle it.
console.log(`Error scanning file. Reason: ${err}`)
$('#readResult').html("扫描错误：" + err);
});
});
})
</script>
</html>
效果：
参阅：https://scanapp.org/html5-qrcode-docs/docs/apis/classes/Html5Qrcode#start（官网）
https://blog.csdn.net/qq_60654563/article/details/140920510
标签：function,条形码,Html5QRCode,decodedText,qrCodeSuccessCallback,二维码,html,readResult,h From： https://www.cnblogs.com/dzw159/p/18534497