<input type=text size=16 placeholder="Tracking Code" class=qrcode-text><label class=qrcode-text-btn><input type=file accept="image/*" capture=environment onchange="openQRCamera(this);" tabindex=-1></label> 
<input type=button value="Go" disabled>
body, input {font-size:14pt}
input, label {vertical-align:middle}
.qrcode-text {padding-right:1.7em; margin-right:0}
.qrcode-text-btn {display:inline-block; background:url(//dab1nmslvvntp.cloudfront.net/wp-content/uploads/2017/07/1499401426qr_icon.svg) 50% 50% no-repeat; height:1em; width:1.7em; margin-left:-1.7em; cursor:pointer}
.qrcode-text-btn > input[type=file] {position:absolute; overflow:hidden; width:1px; height:1px; opacity:0}
function openQRCamera(node) {
  var reader = new FileReader();
  reader.onload = function() {
    node.value = "";
    qrcode.callback = function(res) {
      if(res instanceof Error) {
        alert("No QR code found. Please make sure the QR code is within the camera's frame and try again.");
      } else {
        node.parentNode.previousElementSibling.value = res;
      }
    };
    qrcode.decode(reader.result);
  };
  reader.readAsDataURL(node.files[0]);
}

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

  1. https://dmla.github.io/jsqrcode/src/qr_packed.js