diff --git a/qr/logger.js b/qr/logger.js
new file mode 100644
index 0000000000..daabcd5581
--- /dev/null
+++ b/qr/logger.js
@@ -0,0 +1 @@
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x=function(){var 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r={};return r.totalCount=t,r.dataCount=e,r},r={};return r.getRSBlocks=function(r,n){var o=function(e,r){switch(r){case f.L:return t[4*(e-1)+0];case f.M:return t[4*(e-1)+1];case f.Q:return t[4*(e-1)+2];case f.H:return t[4*(e-1)+3];default:return}}(r,n);if(void 0===o)throw"bad rs block @ typeNumber:"+r+"/errorCorrectionLevel:"+n;for(var i=o.length/3,a=[],s=0;s<i;s+=1)for(var u=o[3*s+0],l=o[3*s+1],c=o[3*s+2],h=0;h<u;h+=1)a.push(e(l,c));return a},r}(),b=function(){var t=[],e=0,r={getBuffer:function(){return t},getAt:function(e){var r=Math.floor(e/8);return 1==(t[r]>>>7-e%8&1)},put:function(t,e){for(var n=0;n<e;n+=1)r.putBit(1==(t>>>e-n-1&1))},getLengthInBits:function(){return e},putBit:function(r){var n=Math.floor(e/8);t.length<=n&&t.push(0),r&&(t[n]|=128>>>e%8),e+=1}};return r},C=function(t){var e=a,r=t,n={getMode:function(){return e},getLength:function(t){return r.length},write:function(t){for(var e=r,n=0;n+2<e.length;)t.put(o(e.substring(n,n+3)),10),n+=3;n<e.length&&(e.length-n==1?t.put(o(e.substring(n,n+1)),4):e.length-n==2&&t.put(o(e.substring(n,n+2)),7))}},o=function(t){for(var e=0,r=0;r<t.length;r+=1)e=10*e+i(t.charAt(r));return e},i=function(t){if("0"<=t&&t<="9")return t.charCodeAt(0)-"0".charCodeAt(0);throw"illegal char :"+t};return n},S=function(t){var e=s,r=t,n={getMode:function(){return e},getLength:function(t){return r.length},write:function(t){for(var e=r,n=0;n+1<e.length;)t.put(45*o(e.charAt(n))+o(e.charAt(n+1)),11),n+=2;n<e.length&&t.put(o(e.charAt(n)),6)}},o=function(t){if("0"<=t&&t<="9")return t.charCodeAt(0)-"0".charCodeAt(0);if("A"<=t&&t<="Z")return t.charCodeAt(0)-"A".charCodeAt(0)+10;switch(t){case" ":return 36;case"$":return 37;case"%":return 38;case"*":return 39;case"+":return 40;case"-":return 41;case".":return 42;case"/":return 43;case":":return 44;default:throw"illegal char :"+t}};return n},k=function(e){var r=u,n=t.stringToBytes(e),o={getMode:function(){return r},getLength:function(t){return n.length},write:function(t){for(var e=0;e<n.length;e+=1)t.put(n[e],8)}};return o},R=function(e){var r=l,n=t.stringToBytesFuncs.SJIS;if(!n)throw"sjis not supported.";!function(t,e){var r=n("友");if(2!=r.length||38726!=(r[0]<<8|r[1]))throw"sjis not supported."}();var o=n(e),i={getMode:function(){return r},getLength:function(t){return~~(o.length/2)},write:function(t){for(var e=o,r=0;r+1<e.length;){var n=(255&e[r])<<8|255&e[r+1];if(33088<=n&&n<=40956)n-=33088;else{if(!(57408<=n&&n<=60351))throw"illegal char at "+(r+1)+"/"+n;n-=49472}n=192*(n>>>8&255)+(255&n),t.put(n,13),r+=2}if(r<e.length)throw"illegal char at "+(r+1)}};return i},I=function(){var t=[],e={writeByte:function(e){t.push(255&e)},writeShort:function(t){e.writeByte(t),e.writeByte(t>>>8)},writeBytes:function(t,r,n){r=r||0,n=n||t.length;for(var o=0;o<n;o+=1)e.writeByte(t[o+r])},writeString:function(t){for(var r=0;r<t.length;r+=1)e.writeByte(t.charCodeAt(r))},toByteArray:function(){return t},toString:function(){var e="";e+="[";for(var r=0;r<t.length;r+=1)r>0&&(e+=","),e+=t[r];return e+="]"}};return e},D=function(t){var e=t,r=0,n=0,o=0,i={read:function(){for(;o<8;){if(r>=e.length){if(0==o)return-1;throw"unexpected end of file./"+o}var t=e.charAt(r);if(r+=1,"="==t)return o=0,-1;t.match(/^\s$/)||(n=n<<6|a(t.charCodeAt(0)),o+=6)}var i=n>>>o-8&255;return o-=8,i}},a=function(t){if(65<=t&&t<=90)return t-65;if(97<=t&&t<=122)return t-97+26;if(48<=t&&t<=57)return t-48+52;if(43==t)return 62;if(47==t)return 63;throw"c:"+t};return i},T=function(t,e,r){for(var n=function(t,e){var r=t,n=e,o=new 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p=String.fromCharCode(o[g]);g+=1,i.contains(d+p)?d+=p:(h.write(i.indexOf(d),n),i.size()<4095&&(i.size()==1<<n&&(n+=1),i.add(d+p)),d=p)}return h.write(i.indexOf(d),n),h.write(r,n),h.flush(),c.toByteArray()},s=function(){var t={},e=0,r={add:function(n){if(r.contains(n))throw"dup key:"+n;t[n]=e,e+=1},size:function(){return e},indexOf:function(e){return t[e]},contains:function(e){return void 0!==t[e]}};return r};return i}(t,e),o=0;o<e;o+=1)for(var i=0;i<t;i+=1)n.setPixel(i,o,r(i,o));var a=I();n.write(a);for(var s=function(){var t=0,e=0,r=0,n="",o={},i=function(t){n+=String.fromCharCode(a(63&t))},a=function(t){if(t<0);else{if(t<26)return 65+t;if(t<52)return t-26+97;if(t<62)return t-52+48;if(62==t)return 43;if(63==t)return 47}throw"n:"+t};return o.writeByte=function(n){for(t=t<<8|255&n,e+=8,r+=1;e>=6;)i(t>>>e-6),e-=6},o.flush=function(){if(e>0&&(i(t<<6-e),t=0,e=0),r%3!=0)for(var o=3-r%3,a=0;a<o;a+=1)n+="="},o.toString=function(){return 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e}(t),this._codes=[],this._timeoutId=null,this._nextQrToGenerate=0,this._nextQrToDisplay=0,document.body.appendChild(this._qrCodeImageElt),this._titleElt.textContent="Generating QR codes... 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