(function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(require,module,exports){
function addTopElement(e){const t=document.createTextNode("  ");e.appendChild(t);const n=document.createElement("i");n.setAttribute("class","fa fa-angle-up");const o=document.createElement("span");o.setAttribute("class","icon"),o.appendChild(n);const c=document.createElement("a");c.setAttribute("href","#navbar"),c.appendChild(o),e.appendChild(c)}function goTop(){const e=document.querySelector("article.content"),t=e.querySelectorAll("h2"),n=e.querySelectorAll("h3");t.forEach(addTopElement),n.forEach(addTopElement)}module.exports=goTop;

},{}],2:[function(require,module,exports){
function hashChange(){if(location.hash){var e=document.querySelector(".navbar").getBoundingClientRect().height;window.scrollBy(0,-1*e)}}module.exports=hashChange;

},{}],3:[function(require,module,exports){
var setMinHeight=require("./setMinHeight"),insertArticleToc=require("./insertArticleToc"),hashChange=require("./hashChange"),navbarHandler=require("./navbarHandler"),menuHandler=require("./menuHandler"),goTop=require("./goTop"),support=require("./support");setMinHeight(),goTop(),insertArticleToc(),window.onhashchange=hashChange,navbarHandler(),menuHandler(),require("./tocHide"),require("./social-share"),support();

},{"./goTop":1,"./hashChange":2,"./insertArticleToc":4,"./menuHandler":5,"./navbarHandler":6,"./setMinHeight":7,"./social-share":8,"./support":9,"./tocHide":10}],4:[function(require,module,exports){
function insertArticleToc(){var e=document.querySelector("article.content"),t=e.querySelector("h2"),r=e.querySelectorAll("h2");if(t&&LOPPO.article_toc&&r.length>=2){var c=document.createElement("div");c.setAttribute("class","article-toc"),c.innerHTML='<h5>目录 [<span class="toc-controller toc-controller-show"><a>隐藏</a></span>]</h5>'+LOPPO.article_toc,e.insertBefore(c,t)}}module.exports=insertArticleToc;

},{}],5:[function(require,module,exports){
function menuHandler(e){const l=[].slice.call(document.querySelectorAll(".menu-list li")),t=[].slice.call(document.querySelectorAll(".menu-list > li"));l.forEach(e=>{e.querySelector("ul")&&(e.querySelector("ul").style.display="none",e.querySelector(".icon i").classList.remove("fa-caret-down"),e.querySelector(".icon i").classList.add("fa-caret-right"))});let r=null;for(let e=0;e<l.length;e++){const t=l[e];if(t.querySelector("a").classList.contains("is-active")){r=t;break}}if(r){let e=r;for(;e&&(e.querySelector("ul")&&(e.querySelector(".icon i").classList.remove("fa-caret-right"),e.querySelector(".icon i").classList.add("fa-caret-down"),e.querySelector(".folder").classList.remove("fa-folder-o"),e.querySelector(".folder").classList.add("fa-folder-open-o"),e.querySelector("ul").style.display="block"),t.indexOf(e)<0);)e=e.parentNode.parentNode}const o=[].slice.call(document.querySelectorAll(".menu li a .icon i"));for(let e=0;e<o.length;e++){o[e].parentNode.addEventListener("click",e=>{e.preventDefault();const l=e.target.querySelector("i")||e.target,t=l.parentNode.parentNode.nextElementSibling,r=l.parentNode.nextElementSibling;l.classList.contains("fa-caret-right")?(l.classList.remove("fa-caret-right"),l.classList.add("fa-caret-down"),r.classList.remove("fa-folder-o"),r.classList.add("fa-folder-open-o"),t.style.display="block"):(l.classList.add("fa-caret-right"),l.classList.remove("fa-caret-down"),r.classList.remove("fa-folder-open-o"),r.classList.add("fa-folder-o"),t.style.display="none")},!0)}}module.exports=menuHandler;

},{}],6:[function(require,module,exports){
function navbarHandler(){const e=Array.prototype.slice.call(document.querySelectorAll(".navbar-burger"),0);e.length>0&&e.forEach(e=>{e.addEventListener("click",()=>{const t=e.dataset.target,a=document.getElementById(t);e.classList.toggle("is-active"),a.classList.toggle("is-active")})})}module.exports=navbarHandler;

},{}],7:[function(require,module,exports){
function setMinHeight(){var e=document.querySelector(".article");e||(e=document.querySelector(".homepage"));var t=window.getComputedStyle(document.querySelector(".navbar")).getPropertyValue("height"),o=0;if(document.querySelector(".hero"))o=window.getComputedStyle(document.querySelector(".hero")).getPropertyValue("height");var r=window.getComputedStyle(document.querySelector(".footer")).getPropertyValue("height"),n=document.documentElement.clientHeight-parseInt(t)-parseInt(o)-parseInt(r);e.style.minHeight=n+"px"}module.exports=setMinHeight;

},{}],8:[function(require,module,exports){
var QRCode;!function(){function t(t){this.mode=r.MODE_8BIT_BYTE,this.data=t,this.parsedData=[];for(var e=0,i=this.data.length;e<i;e++){var n=[],o=this.data.charCodeAt(e);o>65536?(n[0]=240|(1835008&o)>>>18,n[1]=128|(258048&o)>>>12,n[2]=128|(4032&o)>>>6,n[3]=128|63&o):o>2048?(n[0]=224|(61440&o)>>>12,n[1]=128|(4032&o)>>>6,n[2]=128|63&o):o>128?(n[0]=192|(1984&o)>>>6,n[1]=128|63&o):n[0]=o,this.parsedData.push(n)}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 e(t,e){this.typeNumber=t,this.errorCorrectLevel=e,this.modules=null,this.moduleCount=0,this.dataCache=null,this.dataList=[]}t.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)}},e.prototype={addData:function(e){var r=new t(e);this.dataList.push(r),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,r){this.moduleCount=4*this.typeNumber+17,this.modules=new Array(this.moduleCount);for(var i=0;i<this.moduleCount;i++){this.modules[i]=new Array(this.moduleCount);for(var n=0;n<this.moduleCount;n++)this.modules[i][n]=null}this.setupPositionProbePattern(0,0),this.setupPositionProbePattern(this.moduleCount-7,0),this.setupPositionProbePattern(0,this.moduleCount-7),this.setupPositionAdjustPattern(),this.setupTimingPattern(),this.setupTypeInfo(t,r),this.typeNumber>=7&&this.setupTypeNumber(t),null==this.dataCache&&(this.dataCache=e.createData(this.typeNumber,this.errorCorrectLevel,this.dataList)),this.mapData(this.dataCache,r)},setupPositionProbePattern:function(t,e){for(var r=-1;r<=7;r++)if(!(t+r<=-1||this.moduleCount<=t+r))for(var i=-1;i<=7;i++)e+i<=-1||this.moduleCount<=e+i||(this.modules[t+r][e+i]=0<=r&&r<=6&&(0==i||6==i)||0<=i&&i<=6&&(0==r||6==r)||2<=r&&r<=4&&2<=i&&i<=4)},getBestMaskPattern:function(){for(var t=0,e=0,r=0;r<8;r++){this.makeImpl(!0,r);var i=f.getLostPoint(this);(0==r||t>i)&&(t=i,e=r)}return e},createMovieClip:function(t,e,r){var i=t.createEmptyMovieClip(e,r);this.make();for(var n=0;n<this.modules.length;n++)for(var o=1*n,a=0;a<this.modules[n].length;a++){var s=1*a;this.modules[n][a]&&(i.beginFill(0,100),i.moveTo(s,o),i.lineTo(s+1,o),i.lineTo(s+1,o+1),i.lineTo(s,o+1),i.endFill())}return i},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=f.getPatternPosition(this.typeNumber),e=0;e<t.length;e++)for(var r=0;r<t.length;r++){var i=t[e],n=t[r];if(null==this.modules[i][n])for(var o=-2;o<=2;o++)for(var a=-2;a<=2;a++)this.modules[i+o][n+a]=-2==o||2==o||-2==a||2==a||0==o&&0==a}},setupTypeNumber:function(t){for(var e=f.getBCHTypeNumber(this.typeNumber),r=0;r<18;r++){var i=!t&&1==(e>>r&1);this.modules[Math.floor(r/3)][r%3+this.moduleCount-8-3]=i}for(r=0;r<18;r++){i=!t&&1==(e>>r&1);this.modules[r%3+this.moduleCount-8-3][Math.floor(r/3)]=i}},setupTypeInfo:function(t,e){for(var r=this.errorCorrectLevel<<3|e,i=f.getBCHTypeInfo(r),n=0;n<15;n++){var o=!t&&1==(i>>n&1);n<6?this.modules[n][8]=o:n<8?this.modules[n+1][8]=o:this.modules[this.moduleCount-15+n][8]=o}for(n=0;n<15;n++){o=!t&&1==(i>>n&1);n<8?this.modules[8][this.moduleCount-n-1]=o:n<9?this.modules[8][15-n-1+1]=o:this.modules[8][15-n-1]=o}this.modules[this.moduleCount-8][8]=!t},mapData:function(t,e){for(var r=-1,i=this.moduleCount-1,n=7,o=0,a=this.moduleCount-1;a>0;a-=2)for(6==a&&a--;;){for(var s=0;s<2;s++)if(null==this.modules[i][a-s]){var h=!1;o<t.length&&(h=1==(t[o]>>>n&1)),f.getMask(e,i,a-s)&&(h=!h),this.modules[i][a-s]=h,-1==--n&&(o++,n=7)}if((i+=r)<0||this.moduleCount<=i){i-=r,r=-r;break}}}},e.PAD0=236,e.PAD1=17,e.createData=function(t,r,i){for(var n=m.getRSBlocks(t,r),o=new v,a=0;a<i.length;a++){var s=i[a];o.put(s.mode,4),o.put(s.getLength(),f.getLengthInBits(s.mode,t)),s.write(o)}var h=0;for(a=0;a<n.length;a++)h+=n[a].dataCount;if(o.getLengthInBits()>8*h)throw new Error("code length overflow. ("+o.getLengthInBits()+">"+8*h+")");for(o.getLengthInBits()+4<=8*h&&o.put(0,4);o.getLengthInBits()%8!=0;)o.putBit(!1);for(;!(o.getLengthInBits()>=8*h||(o.put(e.PAD0,8),o.getLengthInBits()>=8*h));)o.put(e.PAD1,8);return e.createBytes(o,n)},e.createBytes=function(t,e){for(var r=0,i=0,n=0,o=new Array(e.length),a=new Array(e.length),s=0;s<e.length;s++){var h=e[s].dataCount,l=e[s].totalCount-h;i=Math.max(i,h),n=Math.max(n,l),o[s]=new Array(h);for(var u=0;u<o[s].length;u++)o[s][u]=255&t.buffer[u+r];r+=h;var c=f.getErrorCorrectPolynomial(l),d=new p(o[s],c.getLength()-1).mod(c);a[s]=new Array(c.getLength()-1);for(u=0;u<a[s].length;u++){var g=u+d.getLength()-a[s].length;a[s][u]=g>=0?d.get(g):0}}var m=0;for(u=0;u<e.length;u++)m+=e[u].totalCount;var v=new Array(m),w=0;for(u=0;u<i;u++)for(s=0;s<e.length;s++)u<o[s].length&&(v[w++]=o[s][u]);for(u=0;u<n;u++)for(s=0;s<e.length;s++)u<a[s].length&&(v[w++]=a[s][u]);return v};for(var r={MODE_NUMBER:1,MODE_ALPHA_NUM:2,MODE_8BIT_BYTE:4,MODE_KANJI:8},i={L:1,M:0,Q:3,H:2},n=0,o=1,a=2,s=3,h=4,l=5,u=6,c=7,f={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;f.getBCHDigit(e)-f.getBCHDigit(f.G15)>=0;)e^=f.G15<<f.getBCHDigit(e)-f.getBCHDigit(f.G15);return(t<<10|e)^f.G15_MASK},getBCHTypeNumber:function(t){for(var e=t<<12;f.getBCHDigit(e)-f.getBCHDigit(f.G18)>=0;)e^=f.G18<<f.getBCHDigit(e)-f.getBCHDigit(f.G18);return t<<12|e},getBCHDigit:function(t){for(var e=0;0!=t;)e++,t>>>=1;return e},getPatternPosition:function(t){return f.PATTERN_POSITION_TABLE[t-1]},getMask:function(t,e,r){switch(t){case n:return(e+r)%2==0;case o:return e%2==0;case a:return r%3==0;case s:return(e+r)%3==0;case h:return(Math.floor(e/2)+Math.floor(r/3))%2==0;case l:return e*r%2+e*r%3==0;case u:return(e*r%2+e*r%3)%2==0;case c:return(e*r%3+(e+r)%2)%2==0;default:throw new Error("bad maskPattern:"+t)}},getErrorCorrectPolynomial:function(t){for(var e=new p([1],0),r=0;r<t;r++)e=e.multiply(new p([1,d.gexp(r)],0));return e},getLengthInBits:function(t,e){if(1<=e&&e<10)switch(t){case r.MODE_NUMBER:return 10;case r.MODE_ALPHA_NUM:return 9;case r.MODE_8BIT_BYTE:case r.MODE_KANJI:return 8;default:throw new Error("mode:"+t)}else if(e<27)switch(t){case r.MODE_NUMBER:return 12;case r.MODE_ALPHA_NUM:return 11;case r.MODE_8BIT_BYTE:return 16;case r.MODE_KANJI:return 10;default:throw new Error("mode:"+t)}else{if(!(e<41))throw new Error("type:"+e);switch(t){case r.MODE_NUMBER:return 14;case r.MODE_ALPHA_NUM:return 13;case r.MODE_8BIT_BYTE:return 16;case r.MODE_KANJI:return 12;default:throw new Error("mode:"+t)}}},getLostPoint:function(t){for(var e=t.getModuleCount(),r=0,i=0;i<e;i++)for(var n=0;n<e;n++){for(var o=0,a=t.isDark(i,n),s=-1;s<=1;s++)if(!(i+s<0||e<=i+s))for(var h=-1;h<=1;h++)n+h<0||e<=n+h||0==s&&0==h||a==t.isDark(i+s,n+h)&&o++;o>5&&(r+=3+o-5)}for(i=0;i<e-1;i++)for(n=0;n<e-1;n++){var l=0;t.isDark(i,n)&&l++,t.isDark(i+1,n)&&l++,t.isDark(i,n+1)&&l++,t.isDark(i+1,n+1)&&l++,0!=l&&4!=l||(r+=3)}for(i=0;i<e;i++)for(n=0;n<e-6;n++)t.isDark(i,n)&&!t.isDark(i,n+1)&&t.isDark(i,n+2)&&t.isDark(i,n+3)&&t.isDark(i,n+4)&&!t.isDark(i,n+5)&&t.isDark(i,n+6)&&(r+=40);for(n=0;n<e;n++)for(i=0;i<e-6;i++)t.isDark(i,n)&&!t.isDark(i+1,n)&&t.isDark(i+2,n)&&t.isDark(i+3,n)&&t.isDark(i+4,n)&&!t.isDark(i+5,n)&&t.isDark(i+6,n)&&(r+=40);var 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