forked from bevacqua/dragula
-
Notifications
You must be signed in to change notification settings - Fork 0
/
classes.js
33 lines (28 loc) · 684 Bytes
/
classes.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
'use strict';
var cache = {};
var start = '(?:^|\\s)';
var end = '(?:\\s|$)';
function lookupClass (className) {
var cached = cache[className];
if (cached) {
cached.lastIndex = 0;
} else {
cache[className] = cached = new RegExp(start + className + end, 'g');
}
return cached;
}
function addClass (el, className) {
var current = el.className;
if (!current.length) {
el.className = className;
} else if (!lookupClass(className).test(current)) {
el.className += ' ' + className;
}
}
function rmClass (el, className) {
el.className = el.className.replace(lookupClass(className), ' ').trim();
}
module.exports = {
add: addClass,
rm: rmClass
};