JS1k: The JavaScript code golfing competition
2010 - The Original
- Author:
- Ron MacMuhu
- Twitter:
- @
- GitHub:
- Facebook:
- Google+:
- +
- Reddit:
- /r/
- Pouet:
- Website:
- yocode.de
- Compo:
- classic
- Demo link:
- https://js1k.com/2010-first/demo/563
- Shortlink:
- https://js1k.com/563
- Blog post:
- please update here!
- Bytes:
- 1017
- Chars:
- 1017
- Submission
d=document;i=window.parent.location.href.split("?")[1];l=0;if(i){i=i.split("&");for(j=0;j<i.length;j++){k=i[j].split("=");if(k[0]=="ean")l=k[1];}}q=eval;T="q(u+z.join(v+u)+v)";a=[114,102,108,66,92,78,80,68,72,116];b=[0,11,13,14,19,25,28,21,22,26];x="for(j=0;j<7;j++){k=n[g](i);o=";w="for(;i<";y="6-j;l=(a[k]>>o)&1;if(";u="c.fillRect(";t="l)z.push(i*7+j+";e=d.body;c=e.children[0];if(l)p={value:l};else{f="createElement";g="insertBefore";p=d[f]("input");e[g](p,c);e[g](d[f]("br"),c);p.focus();p.onkeyup=r}c=c.getContext("2d");c.font="24px Arial";g="charAt";r({target:p});function r(e){c.clearRect(0,0,240,200);s="substring";S=e.target.value;L=S.length;if(L>13)S=e.target.value=S[s](L-13,L);if(!S.match(/^\d+$/)){S="";L=0}n="";for(i=0;i<13-L;i++)n+=0;n+=S;z=[2,4,48,50,94,96];v="*2+18,10,2,130);";q(T);i=1;z=[];v=v.replace(3,1);f=n[g](0);h="fillText";c[h](f,6,140);c[h](n[s](1,7),32,140);c[h](n[s](7,13),124,140);h=b[f];q([w,"7;i++){m=(h>>6-i)&1;",x,"m?j:",y,"!m^",t,-2,")}}",w,"13;i++){",x,y,t,3,")}}"].join(""));q(T)}- Description
- EAN-13/UPC barcode renderer Creates the popular barcodes, that are used to identify many products. Enter a 13-digit number in the input field - the 'application' draws the code. It even has a non-interactive mode, which makes this piece of JS really useful for embedding, i.e. in printable HTML: just append a http parameter to the URL, for example '?ean=4002051684617' (without the ') and you get only the result without the input field. Try it and copy-and-paste the example to the end of the address string in your browser window. Update: set code to 0 when non-digits are entered
- Base64 encoded
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Original source not submitted