-
Notifications
You must be signed in to change notification settings - Fork 2
/
index.js
124 lines (109 loc) · 2.24 KB
/
index.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
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
/**
* @typedef {import('hast').Element} Element
*/
/**
* Classlist
* @param {Element} node
*/
function ClassList (node) {
if (!node.properties) node.properties = {}
if (!node.properties.className) node.properties.className = []
const tokens = /** @type {string[]} */(node.properties.className)
let attribute = tokens.join(' ')
const classList = {
add: add,
remove: remove,
contains: contains,
toggle: toggle,
replace: replace,
item: item,
length: tokens.length,
forEach,
entries,
keys,
values,
toString: function () {
return attribute
}
}
/**
* @param {string} token
*/
function add (token) {
if (tokens.indexOf(token) > -1) return
tokens.push(token)
update()
}
/**
* @param {string} token
*/
function remove (token) {
const index = tokens.indexOf(token)
if (index === -1) return
tokens.splice(index, 1)
update()
}
/**
* @param {string} token
*/
function contains (token) {
return tokens.includes(token)
}
/**
* @param {string} token
* @param {(() => boolean) | boolean} force
*/
function toggle (token, force) {
if (force !== undefined) {
force = typeof force === 'function' ? force() : force
if (contains(token) && !force) {
remove(token)
} else if (force) {
add(token)
}
} else {
if (contains(token)) {
remove(token)
} else {
add(token)
}
}
return contains(token)
}
/**
* @param {string} a
* @param {string} b
*/
function replace (a, b) {
const i = tokens.indexOf(a)
if (i > -1) tokens[i] = b
}
/**
* @param {number} index
*/
function item (index) {
return tokens[index] || null
}
function update () {
classList.length = tokens.length
attribute = tokens.join(' ')
}
/**
* @param {(value: string, index: number, array: string[]) => void} callback
* @param {any} [thisArg]
*/
function forEach (callback, thisArg) {
tokens.forEach(callback, thisArg)
}
function entries () {
return tokens.entries()
}
function keys () {
return tokens.keys()
}
function values () {
return tokens.values()
}
return classList
}
export default ClassList