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| var blinkify = function( el, // DOM-Element | |
| rate // Speed (Default: 500 ms) | |
| ){ | |
| setInterval(function(){ // Interval | |
| el.style.opacity ^= 1 // change the visibility | |
| }, rate || 500 ); |
| function(a,b){setInterval(function(){a.style.opacity^=1},b||500)} |
| DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE | |
| Version 2, December 2004 | |
| Copyright (C) 2011 YOUR_NAME_HERE <YOUR_URL_HERE> | |
| 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": "blinkify", | |
| "description": "The Comeback of the Blink-Tag", | |
| "keywords": [ | |
| "blink", | |
| "blinktag", | |
| "retro" | |
| ] | |
| } |
| <!doctype html> | |
| <html> | |
| <head> | |
| </head> | |
| <body> | |
| <b id="test">BLINKY</b><br /> | |
| <b id="test2">BLINKY - fast</b> | |
| <script> | |
| var blinkify = function( el, rate ){ | |
| setInterval(function(){ | |
| el.style.opacity ^= 1 | |
| }, rate || 500 ); | |
| } | |
| blinkify( document.getElementById( "test" ) ); | |
| blinkify( document.getElementById( "test2" ), 100 ); | |
| </script> | |
| </body> | |
| </html> |
Just a typo, fixed. Update: thanks, @phillipdornauer
Thanks to @atk we can go further and exploit the falsiness of empty string:
function(a,b){setInterval(function(){a.style.visibility=b=!b?"hidden":""},b||500)}(82 bytes)
reordered to save the !:
function(a,b){setInterval(function(){b=a.style.visibility=b?"":"hidden"},b||500)}(81 bytes)
Subzey, jed: that was one sweet move.
Sacrificing a little more backward compatibility we can reach 70 bytes:
function(a,b){setInterval(function(){b=a.style.opacity=b?0:1},b||500)}
well, if you're gonna go down that road...
function(a,b){setInterval(function(){b=a.style.opacity=+!b},b||500)}(68 bytes)
or for that matter:
function d(a,b,c){c=a.style.opacity=+!c;setTimeout(d,b||500,a,b,c)}(67 bytes)
or even:
function d(a,b,c){setTimeout(d,b||500,a,b,a.style.opacity=+!c)}(63 bytes, assuming you're okay with losing old browsers)
Interesting.
Supporting the current and previous version of each major browser would be nice. No ?
IE8, does not support setTimeout(function,delay,arg1,arg2,...), so... 68 ?
i'm happy with 68 (unless we want to dial down the default to 99 for 67).
Oh dear, it's amazing.
And finally i make bitwise trick useful.
function(a,b){setInterval(function(){a.style.opacity^=1},b||500)}
(65 bytes)
whoa, nice! i think that's the first useful XOR assignment i've ever seen here.
I think that's it. There's not much code left to optimize here.
Sorry for the b=...=b?0:1 in my previous comment. That was lazy. It was obvious there was room for improvements.
Normally I would say keep the "visible" for there might very well be a CSS rule setting it to "hidden", but this is 140byt.es so...
atk I don't know if this is a typo, but you used a BINARY OR in the delay instead of the LOGICAL OR. This will mess up most delays: the
|and ``||` only rarely have the same result.