Create collapsibleOptGroups.js

dist/js/collapsibleOptGroups.js

+! function(e) {
+	"use strict";
+	jQuery.fn.multiselect.Constructor.prototype.selectAll = (function() {
+		var cached_function	= jQuery.fn.multiselect.Constructor.prototype.selectAll;
+
+		return function() {
+			var args			= Array.prototype.slice.call( arguments );
+				args[0]			= (this.options.enableCollapsibleOptGroups && this.options.multiple) ? false : args[0];
+			cached_function.apply(this, args);
+		};
+	}());
+
+	jQuery.fn.multiselect.Constructor.prototype.deselectAll = (function() {
+		var cached_function	= jQuery.fn.multiselect.Constructor.prototype.deselectAll;
+
+		return function() {
+			var args			= Array.prototype.slice.call( arguments );
+				args[0]			= (this.options.enableCollapsibleOptGroups && this.options.multiple) ? false : args[0];
+			cached_function.apply(this, args);
+		};
+	}());
+
+	jQuery.fn.multiselect.Constructor.prototype.buildDropdownOptions = (function() {
+		var cached_function = jQuery.fn.multiselect.Constructor.prototype.buildDropdownOptions;
+
+		return function() {
+			cached_function.apply(this, arguments);
+
+			if (this.options.enableCollapsibleOptGroups && this.options.multiple) {
+				e("li.multiselect-group", this.$ul).each( function () {
+					var name = $("label", this).html();
+					$(this).html('<a href="javascript:void(0);"><input type="checkbox" value="' + name + '"/><b> ' + name + '<b class="caret"></b></b></a>');
+				});
+				e("li.multiselect-group", this.$ul).siblings().not("li.multiselect-group, li.multiselect-all", this.$ul).each( function () {
+					$(this).toggleClass('hidden', true);
+				});
+				e("li.multiselect-group", this.$ul).on("click", e.proxy(function(t) {
+					t.stopPropagation();
+				}, this));
+				e("li.multiselect-group > a > b", this.$ul).on("click", e.proxy(function(t) {
+					t.stopPropagation();
+					var n = e(t.target).closest('li');
+					var r = n.nextUntil("li.multiselect-group");
+					var i = true;
+					r.each(function() {
+						i = i && e(this).hasClass('hidden');
+					});
+					r.toggleClass('hidden', !i);
+				}, this));
+				e("li.multiselect-group > a > input", this.$ul).on("change", e.proxy(function(t) {
+					t.stopPropagation();
+					var n = e(t.target).closest('li');
+					var r = n.nextUntil("li.multiselect-group");
+					var i = true;
+					var s = r.find("input");
+					s.each(function() {
+						i = i && e(this).prop("checked")
+					});
+					s.prop("checked", !i).trigger("change")
+				}, this));
+				e("li.multiselect-all", this.$ul).css('background', '#f3f3f3').css('border-bottom', '1px solid #eaeaea');
+				e("li.multiselect-group > a, li.multiselect-all > a > label.checkbox", this.$ul).css('padding', '3px 20px 3px 35px');
+				e("li.multiselect-group > a > input", this.$ul).css('margin', '4px 0px 5px -20px');
+			}
+		};
+	}());
+}(window.jQuery)