https://www.wvmakelaardij.nl/shared/lib/jquery-plugin/jquery-plugin.js

1(function ( ) {
2	"use strict";
3	
4	var jQueryPlugin	=
5	window.jQueryPlugin	=	function (ident, func) {
6		return function (arg) {
7			if (this.length > 1) {
8				this.each(function ( ) {
9					var $this	=	$(this);
10				
11					if (!$this.data(ident)) {
12						$this.data(ident, func($this, arg));
13					}
14				});
15			
16				return this;
17			} else if (this.length === 1) {
18				if (!this.data(ident)) {
19					this.data(ident, func(this, arg));
20				}
21			
22				return this.data(ident);
23			}
24		};
25	};
26}());