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c, an expressive className manipulation lib: c( elem, 'has/add/remove/toggle', class_name )
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// class manipulation library | |
function( elem, verb, classname, attr, result ) { | |
// systematically remove class name from className attribute | |
result = elem[ | |
attr = 'className' | |
].replace( | |
eval('/ *\\b' + classname + '\\b/g') | |
// in production environment, replace with the following safer line (+9B) | |
//RegExp('(^| ) *'+ classname +' *( |$)','g') | |
, '' ); | |
return 'has' == verb ? result != elem[attr]: | |
// all other verbs modify className attribute | |
elem[attr] = { | |
add: 1, | |
toggle: result == elem[attr] | |
}[ verb ] ? | |
// verb is 'add' or ( verb is 'toggle' and class name wasn't already present in className attribute) | |
result + ' ' + classname: | |
// verb is anything else ('remove', 'getRidOf') or ( verb is 'toggle' and class name was already present in className attribute) | |
result; | |
} |
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function(e,v,n,c,r){r=e[c='className'].replace(eval('/ *\\b'+n+'\\b/g'),'');return'has'==v?r!=e[c]:e[c]={add:1,toggle:r==e[c]}[v]?r+' '+n:r} |
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DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE | |
Version 2, December 2004 | |
Copyright (C) 2011 @louis_remi <http://louisremi.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. |
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{ | |
"name": "c", | |
"description": "An expressive className manipulation lib: c( elem, 'has/add/remove/toggle', class_name )", | |
"contributors": [ | |
"louisremi", | |
"atk", | |
"tsaniel", | |
"maettig" | |
], | |
"keywords": [ | |
"class", | |
"className", | |
"DOM" | |
] | |
} |
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<!DOCTYPE html> | |
<title>Foo</title> | |
<div id="elem" class="banana"></div> | |
<pre><code><div id="elem" class="banana"></div></code></pre> | |
<div>elem has banana?: <b id=t1>undefined</b></div> | |
<div>elem has chocolate?: <b id=t2>undefined</b></div> | |
<div>elem add cacao: <b id=t3>undefined</b></div> | |
<div>elem remove banana: <b id=t4>undefined</b></div> | |
<div>elem has banana?: <b id=t5>undefined</b></div> | |
<div>elem toggle iceCream?: <b id=t6>undefined</b></div> | |
<div>elem toggle cacao?: <b id=t7>undefined</b></div> | |
<script> | |
var c = function(e,v,n,c,r){r=e[c='className'].replace(eval('/ *\\b'+n+'\\b/g'),'');return'has'==v?r!=e[c]:e[c]={add:1,toggle:r==e[c]}[v]?r+' '+n:r}, | |
$ = function(id) { return document.getElementById(id) }, | |
elem = $("elem"); | |
$("t1").innerHTML = !!c( elem, "has", "banana" ); | |
$("t2").innerHTML = !!c( elem, "has", "chocolate" ); | |
$("t3").innerHTML = c( elem, "add", "cacao" ); | |
$("t4").innerHTML = c( elem, "remove", "banana" ); | |
$("t5").innerHTML = !!c( elem, "has", "banana" ); | |
$("t6").innerHTML = c( elem, "toggle", "iceCream" ); | |
$("t7").innerHTML = c( elem, "toggle", "cacao" ); | |
</script> |
Besides @tsaniel's abusing regular expressions to find prime numbers this is one of my favorite 140byt.es snippets. It's incredible how much functionality is compressed in this toolkit.
I have a suggestion what to do with the remaining 2 bytes: Change eval('/\\b'+n+'\\b/g'),'')
into eval('/ *\\b'+n+'\\b/g'),'')
. This will at least remove some of the spaces. Toggling the same class on and off will not add more and more spaces.
Thanks maettig, I should have applied your suggestion earlier. The output is now much cleaner.
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Thanks Autarc. There are only two characters left so it's a tricky problem ;^)