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
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156// version 1.3 2020-08-30 (C) AAB van der Heijden
// Updated 2.4 2025-01-03
window.$ = document.querySelector.bind(document);
window.$$ = document.querySelectorAll.bind(document);
window.$id = document.getElementById.bind(document);

//DOM reader
//onReady(() =>
//{
//});
const onReady = (callback) => document.addEventListener("DOMContentLoaded", callback);
//DOM and stylesheets ready
const onLoad = (callback) => window.addEventListener("load", callback);

Element.prototype.$ = function (selector)
{
    return this.querySelector(selector);
};

Element.prototype.$$ = function (selector)
{
    return this.querySelectorAll(selector);
};

Element.prototype.addClass = function (className)
{
    this.classList.add(className);
    return this;
};

Element.prototype.removeClass = function (className)
{
    this.classList.remove(className);
    return this;
};

Element.prototype.toggleClass = function (className)
{
    this.classList.toggle(className);
    return this;
};

Element.prototype.hasClass = function (className)
{
    return this.classList.contains(className);
};

Element.prototype.show = function ()
{
    this.style.display = 'inline-block';
    return this;
};

Element.prototype.hide = function ()
{
    this.style.display = 'none';
    return this;
};

Element.prototype.toggleVisibility = function ()
{
    this.style.display = this.style.display === 'none' ? '' : 'none';
    return this;
};

Document.prototype.on = function (event, selectorOrHandler, handler) 
{
    if (typeof selectorOrHandler === 'function') 
    {
        this.addEventListener(event, selectorOrHandler);
    }
    else if (typeof selectorOrHandler === 'string' && typeof handler === 'function') 
    {
        this.addEventListener(event, function (e) 
        {
            if (e.target.matches(selectorOrHandler)) 
            {
                handler.call(e.target, e);
            }
        });
    }
    else 
    {
        throw new Error('Invalid arguments: Expected (event, selector, handler) or (event, handler).');
    }

    return this;
};


Element.prototype.on = function (event, selectorOrHandler, handler)
{
    if (typeof selectorOrHandler === 'function')
    {
        this.addEventListener(event, selectorOrHandler);
    }
    else
    {
        this.addEventListener(event, function (e)
        {
            if (e.target.matches(selectorOrHandler))
            {
                handler.call(e.target, e);
            }
        });
    }
    return this;
};

Element.prototype.off = function (event, handler)
{
    this.removeEventListener(event, handler);
    return this;
};

NodeList.prototype.addClass = function (className)
{
    this.forEach(el => el.addClass(className));
    return this;
};

NodeList.prototype.removeClass = function (className)
{
    this.forEach(el => el.removeClass(className));
    return this;
};

NodeList.prototype.toggleClass = function (className)
{
    this.forEach(el => el.toggleClass(className));
    return this;
};

NodeList.prototype.on = function (event, selectorOrHandler, handler)
{
    this.forEach(el => el.on(event, selectorOrHandler, handler));
    return this;
};

NodeList.prototype.off = function (event, handler)
{
    this.forEach(el => el.off(event, handler));
    return this;
};

window.formatCurrency = (value, locale = 'nl-NL', currency = 'EUR', options = {}) => 
{
    const formatter = new Intl.NumberFormat(locale, 
    {
        style: 'currency',
        currency: currency,
        ...options
    });

    return formatter.format(value);
};