https://account.moneymarketing.co.uk/JavaScript/core/natives/Element.Data.js

1/*
2---
3
4name: data-mootools
5
6description: An API for access to data-attributes in elements.
7
8authors: [Dimitar Christoff]
9
10license: MIT-style license.
11
12provides: Element.data
13
14requires:
15 - Core/Element
16
17...
18*/
19/*jshint mootools:true */
20;(function(){
21	'use strict';
22
23	var rbrace = /(?:\{[\s\S]*\}|\[[\s\S]*\])$/;
24
25	function formatDataProperty(prop){
26		return prop.replace('data-', '').camelCase();
27	}
28
29	var wrap = function(){
30
31		[Document, Element].invoke('implement', {
32
33			data: function(property, force){
34				var data = this.retrieve('dataCollection'),
35					ii = 0,
36					len,
37					hasData = false,
38					attribs;
39
40				if (!data || force === true) {
41					data = {};
42					attribs = this.attributes || [];
43					for (len = attribs.length; ii < len; ++ii) {
44						if (attribs[ii].name.indexOf('data-') === 0) {
45							data[formatDataProperty(attribs[ii].name)] = attribs[ii].value.test(rbrace)
46								? JSON.parse(attribs[ii].value)
47								: attribs[ii].value;
48
49							hasData = true;
50						}
51					}
52
53					if (!hasData)
54						data = null;
55
56					this.store('dataCollection', data);
57				}
58				else {
59					hasData = true;
60				}
61
62				return property ? hasData && data[formatDataProperty(property)] || null : data;
63			}
64		});
65	};
66
67	if (typeof define === 'function' && define.amd) {
68		// returns an empty module
69		define(wrap);
70	}
71	else {
72		wrap();
73	}
74}());