Now at 137 bytes!!!!!
DEMO: http://www.crhallberg.com/beta/140bytes/datejson.html
Convert a Date object into a JSON string using UTC values (YYYY-MM-DDThh:mm:ss.000Z ie 2012-05-31T01:23:33.270Z).
This may not be fully relevant with Javascript 1.8.5, but the native code returns differing formats, so.
Special thanks to Marijn Haverbeke for his Bouncing Beholder explanation (http://marijnhaverbeke.nl/js1k).
| function( | |
| a, // Placeholder or else we'll affect global | |
| ){ | |
| return // Splitting -here- gives us the full time and correct UTC values | |
| (a=this.toUTCString().split(' '))[3] // Year | |
| + ((m=this.getMonth()+1)<9?'-0'+m:-m) // Month with padding (split value is month name) | |
| + '-' | |
| + a[1] // Day (pre-padded) | |
| + 'T' // Date-time delimiter | |
| + a[4] // Full time (pre-padded) | |
| + '.' // Milliseconds with padding | |
| + (this/1+'Z').slice(-3) // this/1 returns the number of millis | |
| } |
| <!DOCTYPE html> | |
| <title>Date.prototype.toJSON</title> | |
| <style>body {font:12pt Courier}</style> | |
| <script> | |
| Date.prototype.JSON = | |
| function(a){return(a=this.toUTCString().split(' '))[3]+('-0'+(this.getMonth()+1)).slice(-3)+'-'+a[1]+'T'+a[4]+'.'+(this/1+'Z').slice(-4)} | |
| // } 140bytes | |
| var d = new Date();var c = (navigator.userAgent.indexOf('Firefox')>-1)? 0 : 1; | |
| </script> | |
| <div>Current UTC time : <script>document.write(d.toUTCString());</script></div> | |
| <div>140bytes version : <script>document.write(d.JSON());</script></div> | |
| <div>Reference UTC time: <script>document.write(d.toJSON());</script></div> | |
| <div>Current length: <script>document.write(Date.prototype.JSON.toString().replace(/\s/g,'').length+c);</script> bytes</div> |
| function(a){return(a=this.toUTCString().split(' '))[3]+('-0'+(this.getMonth()+1)).slice(-3)+'-'+a[1]+'T'+a[4]+'.'+(this/1+'Z').slice(-4)} |
| DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE | |
| Version 2, December 2004 | |
| Copyright (C) 2012 Chris Hallberg <http://crhallberg.com> | |
| Everyone is permitted to copy and distribute verbatim or modified | |
| copies of this license document, and changing it is allowed as long | |
| as the name is changed. | |
| DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE | |
| TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION | |
| 0. You just DO WHAT THE FUCK YOU WANT TO. |
| { | |
| "name": "DateToJSON", | |
| "description": "Convert a Date object into a JSON string using UTC values.", | |
| "keywords": [ | |
| "date", | |
| "json", | |
| "wishlist", | |
| "crossbrowser" | |
| ] | |
| } |