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fix: try to use rear camera by default

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yugasun
2022-05-29 11:04:57 +08:00
parent 8c80e312b3
commit 7d77236fc0
8 changed files with 162 additions and 150 deletions
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demo/camera.html
+40 -37
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@@ -1,45 +1,48 @@
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta http-equiv="X-UA-Compatible" content="ie=edge" />
<title>QrcodeDecoder - Camera</title>
</head>
<body>
<button id="start">Start</button> <button id="stop">Stop</button><br />
<span id="result">Click start to scan qrcode.</span><br />
<hr />
<video id="video" autoplay></video>
<script src="./lib/vconsole.min.js"></script>
<script src="./index.min.js"></script>
<script type="text/javascript">
var vConsole = new VConsole();
console.log('Hello world');
function main() {
var qr = new QrcodeDecoder();
var video = document.querySelector('#video');
var start = document.querySelector('#start');
var stop = document.querySelector('#stop');
var result = document.querySelector('#result');
async function startScan() {
if (!qr.isCanvasSupported()) {
alert("Your browser doesn't match the required specs.");
throw new Error('Canvas and getUserMedia are required');
}
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta http-equiv="X-UA-Compatible" content="ie=edge" />
<title>QrcodeDecoder - Camera</title>
</head>
let code = await qr.decodeFromCamera(video);
console.log('code', code);
result.innerText = 'Result: ' + code.data;
<body>
<button id="start">Start</button> <button id="stop">Stop</button><br />
<span id="result">Click start to scan qrcode.</span><br />
<hr />
<video id="video" autoplay></video>
<script src="./lib/vconsole.min.js"></script>
<script src="./lib/index.min.js"></script>
<script type="text/javascript">
var vConsole = new VConsole();
console.log('Hello world');
function main() {
var qr = new QrcodeDecoder();
var video = document.querySelector('#video');
var start = document.querySelector('#start');
var stop = document.querySelector('#stop');
var result = document.querySelector('#result');
async function startScan() {
if (!qr.isCanvasSupported()) {
alert("Your browser doesn't match the required specs.");
throw new Error('Canvas and getUserMedia are required');
}
start.onclick = startScan;
stop.onclick = function() {
qr.stop();
};
let code = await qr.decodeFromCamera(video);
console.log('code', code);
result.innerText = 'Result: ' + code.data;
}
main();
</script>
</body>
start.onclick = startScan;
stop.onclick = function () {
qr.stop();
};
}
main();
</script>
</body>
</html>