小编Mar*_*usz的帖子

我使用这个二维码扫描仪： https://github.com/mebjas/html5-qrcode

我用这个代码扫描二维码：

         function onScanSuccess(decodedText, decodedResult) {
  // handle the scanned code as you like, for example:
  document.getElementById('text').value = decodedText;
  console.log(`Code matched = ${decodedText}`, decodedResult);
}

function onScanFailure(error) {
  // handle scan failure, usually better to ignore and keep scanning.
  // for example:
  console.warn(`Code scan error = ${error}`);
}

let html5QrcodeScanner = new Html5QrcodeScanner(
    "reader", { fps: 10, qrbox: 250 }, /* verbose= */ false);
html5QrcodeScanner.render(onScanSuccess, onScanFailure);

可以将默认摄像头设置为智能手机背面摄像头。我想在启动时使用设置的后置摄像头运行扫描仪。谢谢，提供一些帮助。