printable QR WiFi credentials generator (self-contained & offline)

qrcode.min.js

/*! qrcode-svg v1.0.0 | https://github.com/papnkukn/qrcode-svg | MIT license */
function QR8bitByte(t){this.mode=QRMode.MODE_8BIT_BYTE,this.data=t,this.parsedData=[];for(var e=0,r=this.data.length;e<r;e++){var o=[],n=this.data.charCodeAt(e);n>65536?(o[0]=240|(1835008&n)>>>18,o[1]=128|(258048&n)>>>12,o[2]=128|(4032&n)>>>6,o[3]=128|63&n):n>2048?(o[0]=224|(61440&n)>>>12,o[1]=128|(4032&n)>>>6,o[2]=128|63&n):n>128?(o[0]=192|(1984&n)>>>6,o[1]=128|63&n):o[0]=n,this.parsedData.push(o)}this.parsedData=Array.prototype.concat.apply([],this.parsedData),this.parsedData.length!=this.data.length&&(this.parsedData.unshift(191),this.parsedData.unshift(187),this.parsedData.unshift(239))}function QRCodeModel(t,e){this.typeNumber=t,this.errorCorrectLevel=e,this.modules=null,this.moduleCount=0,this.dataCache=null,this.dataList=[]}function QRPolynomial(t,e){if(void 0==t.length)throw new Error(t.length+"/"+e);for(var r=0;r<t.length&&0==t[r];)r++;this.num=new Array(t.length-r+e);for(var o=0;o<t.length-r;o++)this.num[o]=t[o+r]}function QRRSBlock(t,e){this.totalCount=t,this.dataCount=e}function QRBitBuffer(){this.buffer=[],this.length=0}function QRCode(t){function e(t){var e=encodeURI(t).toString().replace(/\%[0-9a-fA-F]{2}/g,"a");return e.length+(e.length!=t?3:0)}if(this.options={padding:4,width:256,height:256,typeNumber:4,color:"#000000",background:"#ffffff",ecl:"M"},"string"==typeof t&&(t={content:t}),t)for(var r in t)this.options[r]=t[r];if("string"!=typeof this.options.content)throw new Error("Expected 'content' as string!");if(0===this.options.content.length)throw new Error("Expected 'content' to be non-empty!");if(!(this.options.padding>=0))throw new Error("Expected 'padding' value to be non-negative!");if(!(this.options.width>0&&this.options.height>0))throw new Error("Expected 'width' or 'height' value to be higher than zero!");var o=this.options.content,n=function(t,r){for(var o=e(t),n=1,i=0,a=0,s=QRCodeLimitLength.length;a<=s;a++){var h=QRCodeLimitLength[a];if(!h)throw new Error("Content too long: expected "+i+" but got "+o);switch(r){case"L":i=h[0];break;case"M":i=h[1];break;case"Q":i=h[2];break;case"H":i=h[3];break;default:throw new Error("Unknwon error correction level: "+r)}if(o<=i)break;n++}if(n>QRCodeLimitLength.length)throw new Error("Content too long");return n}(o,this.options.ecl),i=function(t){switch(t){case"L":return QRErrorCorrectLevel.L;case"M":return QRErrorCorrectLevel.M;case"Q":return QRErrorCorrectLevel.Q;case"H":return QRErrorCorrectLevel.H;default:throw new Error("Unknwon error correction level: "+t)}}(this.options.ecl);this.qrcode=new QRCodeModel(n,i),this.qrcode.addData(o),this.qrcode.make()}QR8bitByte.prototype={getLength:function(t){return this.parsedData.length},write:function(t){for(var e=0,r=this.parsedData.length;e<r;e++)t.put(this.parsedData[e],8)}},QRCodeModel.prototype={addData:function(t){var e=new QR8bitByte(t);this.dataList.push(e),this.dataCache=null},isDark:function(t,e){if(t<0||this.moduleCount<=t||e<0||this.moduleCount<=e)throw new Error(t+","+e);return this.modules[t][e]},getModuleCount:function(){return this.moduleCount},make:function(){this.makeImpl(!1,this.getBestMaskPattern())},makeImpl:function(t,e){this.moduleCount=4*this.typeNumber+17,this.modules=new Array(this.moduleCount);for(var r=0;r<this.moduleCount;r++){this.modules[r]=new Array(this.moduleCount);for(var o=0;o<this.moduleCount;o++)this.modules[r][o]=null}this.setupPositionProbePattern(0,0),this.setupPositionProbePattern(this.moduleCount-7,0),this.setupPositionProbePattern(0,this.moduleCount-7),this.setupPositionAdjustPattern(),this.setupTimingPattern(),this.setupTypeInfo(t,e),this.typeNumber>=7&&this.setupTypeNumber(t),null==this.dataCache&&(this.dataCache=QRCodeModel.createData(this.typeNumber,this.errorCorrectLevel,this.dataList)),this.mapData(this.dataCache,e)},setupPositionProbePattern:function(t,e){for(var r=-1;r<=7;r++)if(!(t+r<=-1||this.moduleCount<=t+r))for(var o=-1;o<=7;o++)e+o<=-1||this.moduleCount<=e+o||(this.modules[t+r][e+o]=0<=r&&r<=6&&(0==o||6==o)||0<=o&&o<=6&&(0==r||6==r)||2<=r&&r<=4&&2<=o&&o<=4)},getBestMaskPattern:function(){for(var t=0,e=0,r=0;r<8;r++){this.makeImpl(!0,r);var o=QRUtil.getLostPoint(this);(0==r||t>o)&&(t=o,e=r)}return e},createMovieClip:function(t,e,r){var o=t.createEmptyMovieClip(e,r);this.make();for(var n=0;n<this.modules.length;n++)for(var i=1*n,a=0;a<this.modules[n].length;a++){var s=1*a;this.modules[n][a]&&(o.beginFill(0,100),o.moveTo(s,i),o.lineTo(s+1,i),o.lineTo(s+1,i+1),o.lineTo(s,i+1),o.endFill())}return o},setupTimingPattern:function(){for(var t=8;t<this.moduleCount-8;t++)null==this.modules[t][6]&&(this.modules[t][6]=t%2==0);for(var e=8;e<this.moduleCount-8;e++)null==this.modules[6][e]&&(this.modules[6][e]=e%2==0)},setupPositionAdjustPattern:function(){for(var t=QRUtil.getPatternPosition(this.typeNumber),e=0;e<t.length;e++)for(var r=0;r<t.length;r++){var o=t[e],n=t[r];if(null==this.modules[o][n])for(var i=-2;i<=2;i++)for(var a=-2;a<=2;a++)this.modules[o+i][n+a]=-2==i||2==i||-2==a||2==a||0==i&&0==a}},setupTypeNumber:function(t){for(var e=QRUtil.getBCHTypeNumber(this.typeNumber),r=0;r<18;r++){o=!t&&1==(e>>r&1);this.modules[Math.floor(r/3)][r%3+this.moduleCount-8-3]=o}for(r=0;r<18;r++){var o=!t&&1==(e>>r&1);this.modules[r%3+this.moduleCount-8-3][Math.floor(r/3)]=o}},setupTypeInfo:function(t,e){for(var r=this.errorCorrectLevel<<3|e,o=QRUtil.getBCHTypeInfo(r),n=0;n<15;n++){i=!t&&1==(o>>n&1);n<6?this.modules[n][8]=i:n<8?this.modules[n+1][8]=i:this.modules[this.moduleCount-15+n][8]=i}for(n=0;n<15;n++){var i=!t&&1==(o>>n&1);n<8?this.modules[8][this.moduleCount-n-1]=i:n<9?this.modules[8][15-n-1+1]=i:this.modules[8][15-n-1]=i}this.modules[this.moduleCount-8][8]=!t},mapData:function(t,e){for(var r=-1,o=this.moduleCount-1,n=7,i=0,a=this.moduleCount-1;a>0;a-=2)for(6==a&&a--;;){for(var s=0;s<2;s++)if(null==this.modules[o][a-s]){var h=!1;i<t.length&&(h=1==(t[i]>>>n&1)),QRUtil.getMask(e,o,a-s)&&(h=!h),this.modules[o][a-s]=h,-1==--n&&(i++,n=7)}if((o+=r)<0||this.moduleCount<=o){o-=r,r=-r;break}}}},QRCodeModel.PAD0=236,QRCodeModel.PAD1=17,QRCodeModel.createData=function(t,e,r){for(var o=QRRSBlock.getRSBlocks(t,e),n=new QRBitBuffer,i=0;i<r.length;i++){var a=r[i];n.put(a.mode,4),n.put(a.getLength(),QRUtil.getLengthInBits(a.mode,t)),a.write(n)}for(var s=0,i=0;i<o.length;i++)s+=o[i].dataCount;if(n.getLengthInBits()>8*s)throw new Error("code length overflow. ("+n.getLengthInBits()+">"+8*s+")");for(n.getLengthInBits()+4<=8*s&&n.put(0,4);n.getLengthInBits()%8!=0;)n.putBit(!1);for(;;){if(n.getLengthInBits()>=8*s)break;if(n.put(QRCodeModel.PAD0,8),n.getLengthInBits()>=8*s)break;n.put(QRCodeModel.PAD1,8)}return QRCodeModel.createBytes(n,o)},QRCodeModel.createBytes=function(t,e){for(var r=0,o=0,n=0,i=new Array(e.length),a=new Array(e.length),s=0;s<e.length;s++){var h=e[s].dataCount,u=e[s].totalCount-h;o=Math.max(o,h),n=Math.max(n,u),i[s]=new Array(h);for(c=0;c<i[s].length;c++)i[s][c]=255&t.buffer[c+r];r+=h;var l=QRUtil.getErrorCorrectPolynomial(u),g=new QRPolynomial(i[s],l.getLength()-1).mod(l);a[s]=new Array(l.getLength()-1);for(c=0;c<a[s].length;c++){var d=c+g.getLength()-a[s].length;a[s][c]=d>=0?g.get(d):0}}for(var f=0,c=0;c<e.length;c++)f+=e[c].totalCount;for(var R=new Array(f),Q=0,c=0;c<o;c++)for(s=0;s<e.length;s++)c<i[s].length&&(R[Q++]=i[s][c]);for(c=0;c<n;c++)for(s=0;s<e.length;s++)c<a[s].length&&(R[Q++]=a[s][c]);return R};for(var QRMode={MODE_NUMBER:1,MODE_ALPHA_NUM:2,MODE_8BIT_BYTE:4,MODE_KANJI:8},QRErrorCorrectLevel={L:1,M:0,Q:3,H:2},QRMaskPattern={PATTERN000:0,PATTERN001:1,PATTERN010:2,PATTERN011:3,PATTERN100:4,PATTERN101:5,PATTERN110:6,PATTERN111:7},QRUtil={PATTERN_POSITION_TABLE:[[],[6,18],[6,22],[6,26],[6,30],[6,34],[6,22,38],[6,24,42],[6,26,46],[6,28,50],[6,30,54],[6,32,58],[6,34,62],[6,26,46,66],[6,26,48,70],[6,26,50,74],[6,30,54,78],[6,30,56,82],[6,30,58,86],[6,34,62,90],[6,28,50,72,94],[6,26,50,74,98],[6,30,54,78,102],[6,28,54,80,106],[6,32,58,84,110],[6,30,58,86,114],[6,34,62,90,118],[6,26,50,74,98,122],[6,30,54,78,102,126],[6,26,52,78,104,130],[6,30,56,82,108,134],[6,34,60,86,112,138],[6,30,58,86,114,142],[6,34,62,90,118,146],[6,30,54,78,102,126,150],[6,24,50,76,102,128,154],[6,28,54,80,106,132,158],[6,32,58,84,110,136,162],[6,26,54,82,110,138,166],[6,30,58,86,114,142,170]],G15:1335,G18:7973,G15_MASK:21522,getBCHTypeInfo:function(t){for(var e=t<<10;QRUtil.getBCHDigit(e)-QRUtil.getBCHDigit(QRUtil.G15)>=0;)e^=QRUtil.G15<<QRUtil.getBCHDigit(e)-QRUtil.getBCHDigit(QRUtil.G15);return(t<<10|e)^QRUtil.G15_MASK},getBCHTypeNumber:function(t){for(var e=t<<12;QRUtil.getBCHDigit(e)-QRUtil.getBCHDigit(QRUtil.G18)>=0;)e^=QRUtil.G18<<QRUtil.getBCHDigit(e)-QRUtil.getBCHDigit(QRUtil.G18);return t<<12|e},getBCHDigit:function(t){for(var e=0;0!=t;)e++,t>>>=1;return e},getPatternPosition:function(t){return QRUtil.PATTERN_POSITION_TABLE[t-1]},getMask:function(t,e,r){switch(t){case QRMaskPattern.PATTERN000:return(e+r)%2==0;case QRMaskPattern.PATTERN001:return e%2==0;case QRMaskPattern.PATTERN010:return r%3==0;case QRMaskPattern.PATTERN011:return(e+r)%3==0;case QRMaskPattern.PATTERN100:return(Math.floor(e/2)+Math.floor(r/3))%2==0;case QRMaskPattern.PATTERN101:return e*r%2+e*r%3==0;case QRMaskPattern.PATTERN110:return(e*r%2+e*r%3)%2==0;case QRMaskPattern.PATTERN111:return(e*r%3+(e+r)%2)%2==0;default:throw new Error("bad maskPattern:"+t)}},getErrorCorrectPolynomial:function(t){for(var e=new QRPolynomial([1],0),r=0;r<t;r++)e=e.multiply(new QRPolynomial([1,QRMath.gexp(r)],0));return e},getLengthInBits:function(t,e){if(1<=e&&e<10)switch(t){case QRMode.MODE_NUMBER:return 10;case QRMode.MODE_ALPHA_NUM:return 9;case QRMode.MODE_8BIT_BYTE:case QRMode.MODE_KANJI:return 8;default:throw new Error("mode:"+t)}else if(e<27)switch(t){case QRMode.MODE_NUMBER:return 12;case QRMode.MODE_ALPHA_NUM:return 11;case QRMode.MODE_8BIT_BYTE:return 16;case QRMode.MODE_KANJI:return 10;default:throw new Error("mode:"+t)}else{if(!(e<41))throw new Error("type:"+e);switch(t){case QRMode.MODE_NUMBER:return 14;case QRMode.MODE_ALPHA_NUM:return 13;case QRMode.MODE_8BIT_BYTE:return 16;case QRMode.MODE_KANJI:return 12;default:throw new Error("mode:"+t)}}},getLostPoint:function(t){for(var e=t.getModuleCount(),r=0,o=0;o<e;o++)for(l=0;l<e;l++){for(var n=0,i=t.isDark(o,l),a=-1;a<=1;a++)if(!(o+a<0||e<=o+a))for(var s=-1;s<=1;s++)l+s<0||e<=l+s||0==a&&0==s||i==t.isDark(o+a,l+s)&&n++;n>5&&(r+=3+n-5)}for(o=0;o<e-1;o++)for(l=0;l<e-1;l++){var h=0;t.isDark(o,l)&&h++,t.isDark(o+1,l)&&h++,t.isDark(o,l+1)&&h++,t.isDark(o+1,l+1)&&h++,0!=h&&4!=h||(r+=3)}for(o=0;o<e;o++)for(l=0;l<e-6;l++)t.isDark(o,l)&&!t.isDark(o,l+1)&&t.isDark(o,l+2)&&t.isDark(o,l+3)&&t.isDark(o,l+4)&&!t.isDark(o,l+5)&&t.isDark(o,l+6)&&(r+=40);for(l=0;l<e;l++)for(o=0;o<e-6;o++)t.isDark(o,l)&&!t.isDark(o+1,l)&&t.isDark(o+2,l)&&t.isDark(o+3,l)&&t.isDark(o+4,l)&&!t.isDark(o+5,l)&&t.isDark(o+6,l)&&(r+=40);for(var u=0,l=0;l<e;l++)for(o=0;o<e;o++)t.isDark(o,l)&&u++;return r+=10*(Math.abs(100*u/e/e-50)/5)}},QRMath={glog:function(t){if(t<1)throw new Error("glog("+t+")");return QRMath.LOG_TABLE[t]},gexp:function(t){for(;t<0;)t+=255;for(;t>=256;)t-=255;return QRMath.EXP_TABLE[t]},EXP_TABLE:new Array(256),LOG_TABLE:new Array(256)},i=0;i<8;i++)QRMath.EXP_TABLE[i]=1<<i;for(var i=8;i<256;i++)QRMath.EXP_TABLE[i]=QRMath.EXP_TABLE[i-4]^QRMath.EXP_TABLE[i-5]^QRMath.EXP_TABLE[i-6]^QRMath.EXP_TABLE[i-8];for(var i=0;i<255;i++)QRMath.LOG_TABLE[QRMath.EXP_TABLE[i]]=i;QRPolynomial.prototype={get:function(t){return this.num[t]},getLength:function(){return this.num.length},multiply:function(t){for(var e=new Array(this.getLength()+t.getLength()-1),r=0;r<this.getLength();r++)for(var o=0;o<t.getLength();o++)e[r+o]^=QRMath.gexp(QRMath.glog(this.get(r))+QRMath.glog(t.get(o)));return new QRPolynomial(e,0)},mod:function(t){if(this.getLength()-t.getLength()<0)return this;for(var e=QRMath.glog(this.get(0))-QRMath.glog(t.get(0)),r=new Array(this.getLength()),o=0;o<this.getLength();o++)r[o]=this.get(o);for(o=0;o<t.getLength();o++)r[o]^=QRMath.gexp(QRMath.glog(t.get(o))+e);return new QRPolynomial(r,0).mod(t)}},QRRSBlock.RS_BLOCK_TABLE=[[1,26,19],[1,26,16],[1,26,13],[1,26,9],[1,44,34],[1,44,28],[1,44,22],[1,44,16],[1,70,55],[1,70,44],[2,35,17],[2,35,13],[1,100,80],[2,50,32],[2,50,24],[4,25,9],[1,134,108],[2,67,43],[2,33,15,2,34,16],[2,33,11,2,34,12],[2,86,68],[4,43,27],[4,43,19],[4,43,15],[2,98,78],[4,49,31],[2,32,14,4,33,15],[4,39,13,1,40,14],[2,121,97],[2,60,38,2,61,39],[4,40,18,2,41,19],[4,40,14,2,41,15],[2,146,116],[3,58,36,2,59,37],[4,36,16,4,37,17],[4,36,12,4,37,13],[2,86,68,2,87,69],[4,69,43,1,70,44],[6,43,19,2,44,20],[6,43,15,2,44,16],[4,101,81],[1,80,50,4,81,51],[4,50,22,4,51,23],[3,36,12,8,37,13],[2,116,92,2,117,93],[6,58,36,2,59,37],[4,46,20,6,47,21],[7,42,14,4,43,15],[4,133,107],[8,59,37,1,60,38],[8,44,20,4,45,21],[12,33,11,4,34,12],[3,145,115,1,146,116],[4,64,40,5,65,41],[11,36,16,5,37,17],[11,36,12,5,37,13],[5,109,87,1,110,88],[5,65,41,5,66,42],[5,54,24,7,55,25],[11,36,12],[5,122,98,1,123,99],[7,73,45,3,74,46],[15,43,19,2,44,20],[3,45,15,13,46,16],[1,135,107,5,136,108],[10,74,46,1,75,47],[1,50,22,15,51,23],[2,42,14,17,43,15],[5,150,120,1,151,121],[9,69,43,4,70,44],[17,50,22,1,51,23],[2,42,14,19,43,15],[3,141,113,4,142,114],[3,70,44,11,71,45],[17,47,21,4,48,22],[9,39,13,16,40,14],[3,135,107,5,136,108],[3,67,41,13,68,42],[15,54,24,5,55,25],[15,43,15,10,44,16],[4,144,116,4,145,117],[17,68,42],[17,50,22,6,51,23],[19,46,16,6,47,17],[2,139,111,7,140,112],[17,74,46],[7,54,24,16,55,25],[34,37,13],[4,151,121,5,152,122],[4,75,47,14,76,48],[11,54,24,14,55,25],[16,45,15,14,46,16],[6,147,117,4,148,118],[6,73,45,14,74,46],[11,54,24,16,55,25],[30,46,16,2,47,17],[8,132,106,4,133,107],[8,75,47,13,76,48],[7,54,24,22,55,25],[22,45,15,13,46,16],[10,142,114,2,143,115],[19,74,46,4,75,47],[28,50,22,6,51,23],[33,46,16,4,47,17],[8,152,122,4,153,123],[22,73,45,3,74,46],[8,53,23,26,54,24],[12,45,15,28,46,16],[3,147,117,10,148,118],[3,73,45,23,74,46],[4,54,24,31,55,25],[11,45,15,31,46,16],[7,146,116,7,147,117],[21,73,45,7,74,46],[1,53,23,37,54,24],[19,45,15,26,46,16],[5,145,115,10,146,116],[19,75,47,10,76,48],[15,54,24,25,55,25],[23,45,15,25,46,16],[13,145,115,3,146,116],[2,74,46,29,75,47],[42,54,24,1,55,25],[23,45,15,28,46,16],[17,145,115],[10,74,46,23,75,47],[10,54,24,35,55,25],[19,45,15,35,46,16],[17,145,115,1,146,116],[14,74,46,21,75,47],[29,54,24,19,55,25],[11,45,15,46,46,16],[13,145,115,6,146,116],[14,74,46,23,75,47],[44,54,24,7,55,25],[59,46,16,1,47,17],[12,151,121,7,152,122],[12,75,47,26,76,48],[39,54,24,14,55,25],[22,45,15,41,46,16],[6,151,121,14,152,122],[6,75,47,34,76,48],[46,54,24,10,55,25],[2,45,15,64,46,16],[17,152,122,4,153,123],[29,74,46,14,75,47],[49,54,24,10,55,25],[24,45,15,46,46,16],[4,152,122,18,153,123],[13,74,46,32,75,47],[48,54,24,14,55,25],[42,45,15,32,46,16],[20,147,117,4,148,118],[40,75,47,7,76,48],[43,54,24,22,55,25],[10,45,15,67,46,16],[19,148,118,6,149,119],[18,75,47,31,76,48],[34,54,24,34,55,25],[20,45,15,61,46,16]],QRRSBlock.getRSBlocks=function(t,e){var r=QRRSBlock.getRsBlockTable(t,e);if(void 0==r)throw new Error("bad rs block @ typeNumber:"+t+"/errorCorrectLevel:"+e);for(var o=r.length/3,n=[],i=0;i<o;i++)for(var a=r[3*i+0],s=r[3*i+1],h=r[3*i+2],u=0;u<a;u++)n.push(new QRRSBlock(s,h));return n},QRRSBlock.getRsBlockTable=function(t,e){switch(e){case QRErrorCorrectLevel.L:return QRRSBlock.RS_BLOCK_TABLE[4*(t-1)+0];case QRErrorCorrectLevel.M:return QRRSBlock.RS_BLOCK_TABLE[4*(t-1)+1];case QRErrorCorrectLevel.Q:return QRRSBlock.RS_BLOCK_TABLE[4*(t-1)+2];case QRErrorCorrectLevel.H:return QRRSBlock.RS_BLOCK_TABLE[4*(t-1)+3];default:return}},QRBitBuffer.prototype={get:function(t){var e=Math.floor(t/8);return 1==(this.buffer[e]>>>7-t%8&1)},put:function(t,e){for(var r=0;r<e;r++)this.putBit(1==(t>>>e-r-1&1))},getLengthInBits:function(){return this.length},putBit:function(t){var e=Math.floor(this.length/8);this.buffer.length<=e&&this.buffer.push(0),t&&(this.buffer[e]|=128>>>this.length%8),this.length++}};var QRCodeLimitLength=[[17,14,11,7],[32,26,20,14],[53,42,32,24],[78,62,46,34],[106,84,60,44],[134,106,74,58],[154,122,86,64],[192,152,108,84],[230,180,130,98],[271,213,151,119],[321,251,177,137],[367,287,203,155],[425,331,241,177],[458,362,258,194],[520,412,292,220],[586,450,322,250],[644,504,364,280],[718,560,394,310],[792,624,442,338],[858,666,482,382],[929,711,509,403],[1003,779,565,439],[1091,857,611,461],[1171,911,661,511],[1273,997,715,535],[1367,1059,751,593],[1465,1125,805,625],[1528,1190,868,658],[1628,1264,908,698],[1732,1370,982,742],[1840,1452,1030,790],[1952,1538,1112,842],[2068,1628,1168,898],[2188,1722,1228,958],[2303,1809,1283,983],[2431,1911,1351,1051],[2563,1989,1423,1093],[2699,2099,1499,1139],[2809,2213,1579,1219],[2953,2331,1663,1273]];QRCode.prototype.svg=function(t){void 0===t&&(t={container:"svg"});for(var e=this.options,r=this.qrcode.modules,o="\r\n",n=e.width,i=e.height,a=r.length,s=n/(a+2*e.padding),h=i/(a+2*e.padding),u='<rect x="0" y="0" width="'+n+'" height="'+i+'" style="fill:'+e.background+';shape-rendering:crispEdges;"/>'+o,l=0;l<a;l++)for(var g=0;g<a;g++)r[g][l]&&(u+='<rect x="'+(g*s+e.padding*s).toString()+'" y="'+(l*h+e.padding*h).toString()+'" width="'+s+'" height="'+h+'" style="fill:'+e.color+';shape-rendering:crispEdges;"/>'+o);var d="";switch(t.container){case"svg":d+='<?xml version="1.0" standalone="yes"?>\r\n<svg xmlns="http://www.w3.org/2000/svg" version="1.1" width="'+n+'" height="'+i+'">'+o,d+=u,d+="</svg>";break;case"g":d+='<g width="'+n+'" height="'+i+'">'+o,d+=u,d+="</g>";break;default:d+=u}return d},QRCode.prototype.save=function(t,e){var r=this.svg();require("fs").writeFile(t,r,e)},"undefined"!=typeof module&&(module.exports=QRCode);

wifi-qr.html

<!DOCTYPE html>
<!-- printable WiFi credentials QR page -->
<html>
<body>
<style>
#key, #ssid {
	font-family: monospace;
	font-size: 20px;
	text-align: center;
	border: 0;
	display: block;
	width: 100%;
}

#ssid {
	font-size: 12px;
}

#container {
	margin: 0 auto;
	width: 256px;
}

#outer {
	text-align: center;
}
</style>

<div id="outer">
<div id="container"></div>
<input id="key" value="foobar" placeholder="SSID">
<input id="ssid" value="alsofoobar" placeholder="WiFi Password">
</div>

<script src="qrcode.min.js"></script>
<script>
// https://github.com/papnkukn/qrcode-svg

$ = document.getElementById.bind(document);
$v = function(id) { return $(id).value; };

function makeQR(ssid, key) {
	var params = {
		S: ssid,
		T: 'WPA',
		P: key,
	};

	qrstr = 'WIFI:';
	for (var k in params) qrstr += k + ':' + params[k] + ';';
	qrstr += ';';
	console.log(qrstr);

	var qrcode = new QRCode(qrstr);
	var svg = qrcode.svg();
	$('container').innerHTML = svg;
}

document.querySelectorAll('input').forEach(function(e) {
	e.onchange = function(ev) { makeQR($v('ssid'), $v('key')); };
});

$('key').onchange();

</script>
</body>
</html>