用HTML+JS制作二维码生成器

女爷i 2024-03-02 09:02 89阅读 0赞

代码如下

--------------------

<!DOCTYPE html>  
<html>  
<head>  
<meta name="viewport" content="width=device-width, initial-scale=1.0">  
<title>二维码生成</title>  
<style>  
body \{  
font-family: Arial, sans-serif;  
text-align: center;  
margin: 0;  
padding: 0;  
\}

h1 \{  
margin-top: 30px;  
\}

input \{  
width: 300px;  
height: 30px;  
font-size: 16px;  
padding: 5px;  
margin-top: 20px;  
\}

button \{  
width: 120px;  
height: 40px;  
font-size: 18px;  
margin-top: 20px;  
background-color: \#4CAF50;  
color: white;  
border: none;  
cursor: pointer;  
\}

canvas \{  
margin-top: 20px;  
\}  
</style>  
<script src="looknow.js"></script>  
</head>  
<body>  
<h1>闪光二维码</h1>  
<input type="text" id="text-input" placeholder="输入要生成二维码的文本">  
<br><br>  
<button οnclick="generateQRCode()">生成二维码</button>  
<br><br>  
<canvas id="qrcode"></canvas>

--------------------

looknow.js

--------------------

/\*! QRious v4.0.2 | (C) 2017 Alasdair Mercer | GPL v3 License  
Based on jsqrencode | (C) 2010 tz@execpc.com | GPL v3 License  
\*/  
!function(t,e)\{"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):t.QRious=e()\}(this,function()\{"use strict";function t(t,e)\{var n;return"function"==typeof Object.create?n=Object.create(t):(s.prototype=t,n=new s,s.prototype=null),e&&i(!0,n,e),n\}function e(e,n,s,r)\{var o=this;return"string"!=typeof e&&(r=s,s=n,n=e,e=null),"function"!=typeof n&&(r=s,s=n,n=function()\{return o.apply(this,arguments)\}),i(!1,n,o,r),n.prototype=t(o.prototype,s),n.prototype.constructor=n,n.class\_=e||o.class\_,n.super\_=o,n\}function i(t,e,i)\{for(var n,s,a=0,h=(i=o.call(arguments,2)).length;a<h;a++)\{s=i\[a\];for(n in s)t&&!r.call(s,n)||(e\[n\]=s\[n\])\}\}function n()\{\}var s=function()\{\},r=Object.prototype.hasOwnProperty,o=Array.prototype.slice,a=e;n.class\_="Nevis",n.super\_=Object,n.extend=a;var h=n,f=h.extend(function(t,e,i)\{this.qrious=t,this.element=e,this.element.qrious=t,this.enabled=Boolean(i)\},\{draw:function(t)\{\},getElement:function()\{return this.enabled||(this.enabled=!0,this.render()),this.element\},getModuleSize:function(t)\{var e=this.qrious,i=e.padding||0,n=Math.floor((e.size-2\*i)/t.width);return Math.max(1,n)\},getOffset:function(t)\{var e=this.qrious,i=e.padding;if(null!=i)return i;var n=this.getModuleSize(t),s=Math.floor((e.size-n\*t.width)/2);return Math.max(0,s)\},render:function(t)\{this.enabled&&(this.resize(),this.reset(),this.draw(t))\},reset:function()\{\},resize:function()\{\}\}),c=f.extend(\{draw:function(t)\{var e,i,n=this.qrious,s=this.getModuleSize(t),r=this.getOffset(t),o=this.element.getContext("2d");for(o.fillStyle=n.foreground,o.globalAlpha=n.foregroundAlpha,e=0;e<t.width;e++)for(i=0;i<t.width;i++)t.buffer\[i\*t.width+e\]&&o.fillRect(s\*e+r,s\*i+r,s,s)\},reset:function()\{var t=this.qrious,e=this.element.getContext("2d"),i=t.size;e.lineWidth=1,e.clearRect(0,0,i,i),e.fillStyle=t.background,e.globalAlpha=t.backgroundAlpha,e.fillRect(0,0,i,i)\},resize:function()\{var 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e,i,n,s,r,o=t.value.length;for(this.\_badness=\[\],this.\_level=l.LEVELS\[t.level\],this.\_polynomial=\[\],this.\_value=t.value,this.\_version=0,this.\_stringBuffer=\[\];this.\_version<40&&(this.\_version++,n=4\*(this.\_level-1)+16\*(this.\_version-1),s=l.BLOCKS\[n++\],r=l.BLOCKS\[n++\],e=l.BLOCKS\[n++\],i=l.BLOCKS\[n\],n=e\*(s+r)+r-3+(this.\_version<=9),!(o<=n)););this.\_dataBlock=e,this.\_eccBlock=i,this.\_neccBlock1=s,this.\_neccBlock2=r;var a=this.width=17+4\*this.\_version;this.buffer=v.\_createArray(a\*a),this.\_ecc=v.\_createArray(e+(e+i)\*(s+r)+r),this.\_mask=v.\_createArray((a\*(a+1)+1)/2),this.\_insertFinders(),this.\_insertAlignments(),this.buffer\[8+a\*(a-8)\]=1,this.\_insertTimingGap(),this.\_reverseMask(),this.\_insertTimingRowAndColumn(),this.\_insertVersion(),this.\_syncMask(),this.\_convertBitStream(o),this.\_calculatePolynomial(),this.\_appendEccToData(),this.\_interleaveBlocks(),this.\_pack(),this.\_finish()\},\{\_addAlignment:function(t,e)\{var 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c=0,u=f;for(u+=u<<2,u<<=1;u>h\*h;)u-=h\*h,c++;for(r+=c\*v.N4,n=0;n<h;n++)\{for(i=0,o\[0\]=0,t=0,s=0;s<h;s++)t===(e=a\[n+h\*s\])?o\[i\]++:o\[++i\]=1,t=e;r+=this.\_getBadness(i)\}return r\},\_convertBitStream:function(t)\{var e,i,n=this.\_ecc,s=this.\_version;for(i=0;i<t;i++)n\[i\]=this.\_value.charCodeAt(i);var r=this.\_stringBuffer=n.slice(),o=this.\_calculateMaxLength();t>=o-2&&(t=o-2,s>9&&t--);var a=t;if(s>9)\{for(r\[a+2\]=0,r\[a+3\]=0;a--;)e=r\[a\],r\[a+3\]|=255&e<<4,r\[a+2\]=e>>4;r\[2\]|=255&t<<4,r\[1\]=t>>4,r\[0\]=64|t>>12\}else\{for(r\[a+1\]=0,r\[a+2\]=0;a--;)e=r\[a\],r\[a+2\]|=255&e<<4,r\[a+1\]=e>>4;r\[1\]|=255&t<<4,r\[0\]=64|t>>4\}for(a=t+3-(s<10);a<o;)r\[a++\]=236,r\[a++\]=17\},\_getBadness:function(t)\{var e,i=0,n=this.\_badness;for(e=0;e<=t;e++)n\[e\]>=5&&(i+=v.N1+n\[e\]-5);for(e=3;e<t-1;e+=2)n\[e-2\]===n\[e+2\]&&n\[e+2\]===n\[e-1\]&&n\[e-1\]===n\[e+1\]&&3\*n\[e-1\]===n\[e\]&&(0===n\[e-3\]||e+3>t||3\*n\[e-3\]>=4\*n\[e\]||3\*n\[e+3\]>=4\*n\[e\])&&(i+=v.N3);return i\},\_finish:function()\{this.\_stringBuffer=this.buffer.slice();var t,e,i=0,n=3e4;for(e=0;e<8&&(this.\_applyMask(e),(t=this.\_checkBadness())<n&&(n=t,i=e),7!==i);e++)this.buffer=this.\_stringBuffer.slice();i!==e&&this.\_applyMask(i),n=l.FINAL\_FORMAT\[i+(this.\_level-1<<3)\];var s=this.buffer,r=this.width;for(e=0;e<8;e++,n>>=1)1&n&&(s\[r-1-e+8\*r\]=1,e<6?s\[8+r\*e\]=1:s\[8+r\*(e+1)\]=1);for(e=0;e<7;e++,n>>=1)1&n&&(s\[8+r\*(r-7+e)\]=1,e?s\[6-e+8\*r\]=1:s\[7+8\*r\]=1)\},\_interleaveBlocks:function()\{var t,e,i=this.\_dataBlock,n=this.\_ecc,s=this.\_eccBlock,r=0,o=this.\_calculateMaxLength(),a=this.\_neccBlock1,h=this.\_neccBlock2,f=this.\_stringBuffer;for(t=0;t<i;t++)\{for(e=0;e<a;e++)n\[r++\]=f\[t+e\*i\];for(e=0;e<h;e++)n\[r++\]=f\[a\*i+t+e\*(i+1)\]\}for(e=0;e<h;e++)n\[r++\]=f\[a\*i+t+e\*(i+1)\];for(t=0;t<s;t++)for(e=0;e<a+h;e++)n\[r++\]=f\[o+t+e\*s\];this.\_stringBuffer=n\},\_insertAlignments:function()\{var t,e,i,n=this.\_version,s=this.width;if(n>1)for(t=u.BLOCK\[n\],i=s-7;;)\{for(e=s-7;e>t-3&&(this.\_addAlignment(e,i),!(e<t));)e-=t;if(i<=t+9)break;i-=t,this.\_addAlignment(6,i),this.\_addAlignment(i,6)\}\},\_insertFinders:function()\{var t,e,i,n,s=this.buffer,r=this.width;for(t=0;t<3;t++)\{for(e=0,n=0,1===t&&(e=r-7),2===t&&(n=r-7),s\[n+3+r\*(e+3)\]=1,i=0;i<6;i++)s\[n+i+r\*e\]=1,s\[n+r\*(e+i+1)\]=1,s\[n+6+r\*(e+i)\]=1,s\[n+i+1+r\*(e+6)\]=1;for(i=1;i<5;i++)this.\_setMask(n+i,e+1),this.\_setMask(n+1,e+i+1),this.\_setMask(n+5,e+i),this.\_setMask(n+i+1,e+5);for(i=2;i<4;i++)s\[n+i+r\*(e+2)\]=1,s\[n+2+r\*(e+i+1)\]=1,s\[n+4+r\*(e+i)\]=1,s\[n+i+1+r\*(e+4)\]=1\}\},\_insertTimingGap:function()\{var t,e,i=this.width;for(e=0;e<7;e++)this.\_setMask(7,e),this.\_setMask(i-8,e),this.\_setMask(7,e+i-7);for(t=0;t<8;t++)this.\_setMask(t,7),this.\_setMask(t+i-8,7),this.\_setMask(t,i-8)\},\_insertTimingRowAndColumn:function()\{var 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