add support to dropdown events

.gitignore

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+.idea
+.grunt
+node_modules
+/package-lock.json

.gitmodules

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+[submodule "bootstrap"]
+	path = bootstrap
+	url = https://github.com/twbs/bootstrap.git

Gruntfile.js

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+module.exports = function (grunt) {
+    'use strict';
+
+    // Force use of Unix newlines
+    grunt.util.linefeed = '\n';
+
+    grunt.initConfig({
+
+        'clean': {
+            'dist': ['dist']
+        },
+
+        'copy': {
+            'js': {
+                'src': 'js/*',
+                'dest': 'dist/'
+            }
+        },
+
+        'less': {
+            compileCore: {
+                options: {
+                },
+                files: {
+                    'dist/css/dropdowns-enhancement.css': 'less/dropdowns-enhancement.less'
+                }
+            },
+            minify: {
+                options: {
+                    cleancss: true
+                },
+                files: {
+                    'dist/css/dropdowns-enhancement.min.css': 'dist/css/dropdowns-enhancement.css'
+                }
+            }
+        },
+
+        'gh-pages': {
+            options: {
+                base: 'docs',
+                message: 'Auto-generated gh-pages'
+            },
+            src: '**/*'
+        }
+    });
+
+    // These plugins provide necessary tasks.
+    require('load-grunt-tasks')(grunt, {scope: 'devDependencies'});
+
+    grunt.registerTask('dist', ['clean', 'copy', 'less']);
+    grunt.registerTask('pages', 'gh-pages');
+};

README.md

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+Bootstrap Dropdown Menus Enhancement v3.1.1
+===============================
+
+Enhancing functionality of dropdown menus.
+Added the following improvements:
+
+* Sub-Menus
+* Support for radio and checkboxes
+* Positioning of menus
+* Bullet for menus
+
+For demo and docs visit [http://behigh.github.io/bootstrap_dropdowns_enhancement/](http://behigh.github.io/bootstrap_dropdowns_enhancement/)

dist/css/dropdowns-enhancement.css

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+.dropdown-menu > li > label {
+  display: block;
+  padding: 3px 20px;
+  clear: both;
+  font-weight: normal;
+  line-height: 1.42857143;
+  color: #333333;
+  white-space: nowrap;
+}
+.dropdown-menu > li > label:hover,
+.dropdown-menu > li > label:focus {
+  text-decoration: none;
+  color: #262626;
+  background-color: #f5f5f5;
+}
+.dropdown-menu > li > input:checked ~ label,
+.dropdown-menu > li > input:checked ~ label:hover,
+.dropdown-menu > li > input:checked ~ label:focus,
+.dropdown-menu > .active > label,
+.dropdown-menu > .active > label:hover,
+.dropdown-menu > .active > label:focus {
+  color: #ffffff;
+  text-decoration: none;
+  outline: 0;
+  background-color: #428bca;
+}
+.dropdown-menu > li > input[disabled] ~ label,
+.dropdown-menu > li > input[disabled] ~ label:hover,
+.dropdown-menu > li > input[disabled] ~ label:focus,
+.dropdown-menu > .disabled > label,
+.dropdown-menu > .disabled > label:hover,
+.dropdown-menu > .disabled > label:focus {
+  color: #999999;
+}
+.dropdown-menu > li > input[disabled] ~ label:hover,
+.dropdown-menu > li > input[disabled] ~ label:focus,
+.dropdown-menu > .disabled > label:hover,
+.dropdown-menu > .disabled > label:focus {
+  text-decoration: none;
+  background-color: transparent;
+  background-image: none;
+  filter: progid:DXImageTransform.Microsoft.gradient(enabled = false);
+  cursor: not-allowed;
+}
+.dropdown-menu > li > label {
+  margin-bottom: 0;
+  cursor: pointer;
+}
+.dropdown-menu > li > input[type="radio"],
+.dropdown-menu > li > input[type="checkbox"] {
+  display: none;
+  position: absolute;
+  top: -9999em;
+  left: -9999em;
+}
+.dropdown-menu > li > label:focus,
+.dropdown-menu > li > input:focus ~ label {
+  outline: thin dotted;
+  outline: 5px auto -webkit-focus-ring-color;
+  outline-offset: -2px;
+}
+.dropdown-menu.pull-right {
+  right: 0;
+  left: auto;
+}
+.dropdown-menu.pull-top {
+  bottom: 100%;
+  top: auto;
+  margin: 0 0 2px;
+  -webkit-box-shadow: 0 -6px 12px rgba(0, 0, 0, 0.175);
+  box-shadow: 0 -6px 12px rgba(0, 0, 0, 0.175);
+}
+.dropdown-menu.pull-center {
+  right: 50%;
+  left: auto;
+}
+.dropdown-menu.pull-middle {
+  right: 100%;
+  margin: 0 2px 0 0;
+  box-shadow: -5px 0 10px rgba(0, 0, 0, 0.2);
+  left: auto;
+}
+.dropdown-menu.pull-middle.pull-right {
+  right: auto;
+  left: 100%;
+  margin: 0 0 0 2px;
+  box-shadow: 5px 0 10px rgba(0, 0, 0, 0.2);
+}
+.dropdown-menu.pull-middle.pull-center {
+  right: 50%;
+  margin: 0;
+  box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
+}
+.dropdown-menu.bullet {
+  margin-top: 8px;
+}
+.dropdown-menu.bullet:before {
+  width: 0;
+  height: 0;
+  content: '';
+  display: inline-block;
+  position: absolute;
+  border-color: transparent;
+  border-style: solid;
+  -webkit-transform: rotate(360deg);
+  border-width: 0 7px 7px;
+  border-bottom-color: #cccccc;
+  border-bottom-color: rgba(0, 0, 0, 0.15);
+  top: -7px;
+  left: 9px;
+}
+.dropdown-menu.bullet:after {
+  width: 0;
+  height: 0;
+  content: '';
+  display: inline-block;
+  position: absolute;
+  border-color: transparent;
+  border-style: solid;
+  -webkit-transform: rotate(360deg);
+  border-width: 0 6px 6px;
+  border-bottom-color: #ffffff;
+  top: -6px;
+  left: 10px;
+}
+.dropdown-menu.bullet.pull-right:before {
+  left: auto;
+  right: 9px;
+}
+.dropdown-menu.bullet.pull-right:after {
+  left: auto;
+  right: 10px;
+}
+.dropdown-menu.bullet.pull-top {
+  margin-top: 0;
+  margin-bottom: 8px;
+}
+.dropdown-menu.bullet.pull-top:before {
+  top: auto;
+  bottom: -7px;
+  border-bottom-width: 0;
+  border-top-width: 7px;
+  border-top-color: #cccccc;
+  border-top-color: rgba(0, 0, 0, 0.15);
+}
+.dropdown-menu.bullet.pull-top:after {
+  top: auto;
+  bottom: -6px;
+  border-bottom: none;
+  border-top-width: 6px;
+  border-top-color: #ffffff;
+}
+.dropdown-menu.bullet.pull-center:before {
+  left: auto;
+  right: 50%;
+  margin-right: -7px;
+}
+.dropdown-menu.bullet.pull-center:after {
+  left: auto;
+  right: 50%;
+  margin-right: -6px;
+}
+.dropdown-menu.bullet.pull-middle {
+  margin-right: 8px;
+}
+.dropdown-menu.bullet.pull-middle:before {
+  top: 50%;
+  left: 100%;
+  right: auto;
+  margin-top: -7px;
+  border-right-width: 0;
+  border-bottom-color: transparent;
+  border-top-width: 7px;
+  border-left-color: #cccccc;
+  border-left-color: rgba(0, 0, 0, 0.15);
+}
+.dropdown-menu.bullet.pull-middle:after {
+  top: 50%;
+  left: 100%;
+  right: auto;
+  margin-top: -6px;
+  border-right-width: 0;
+  border-bottom-color: transparent;
+  border-top-width: 6px;
+  border-left-color: #ffffff;
+}
+.dropdown-menu.bullet.pull-middle.pull-right {
+  margin-right: 0;
+  margin-left: 8px;
+}
+.dropdown-menu.bullet.pull-middle.pull-right:before {
+  left: -7px;
+  border-left-width: 0;
+  border-right-width: 7px;
+  border-right-color: #cccccc;
+  border-right-color: rgba(0, 0, 0, 0.15);
+}
+.dropdown-menu.bullet.pull-middle.pull-right:after {
+  left: -6px;
+  border-left-width: 0;
+  border-right-width: 6px;
+  border-right-color: #ffffff;
+}
+.dropdown-menu.bullet.pull-middle.pull-center {
+  margin-left: 0;
+  margin-right: 0;
+}
+.dropdown-menu.bullet.pull-middle.pull-center:before {
+  border: none;
+  display: none;
+}
+.dropdown-menu.bullet.pull-middle.pull-center:after {
+  border: none;
+  display: none;
+}
+.dropdown-submenu {
+  position: relative;
+}
+.dropdown-submenu > .dropdown-menu {
+  top: 0;
+  left: 100%;
+  margin-top: -6px;
+  margin-left: -1px;
+  border-top-left-radius: 0;
+}
+.dropdown-submenu > a:before {
+  display: block;
+  float: right;
+  width: 0;
+  height: 0;
+  content: "";
+  margin-top: 6px;
+  margin-right: -8px;
+  border-width: 4px 0 4px 4px;
+  border-style: solid;
+  border-left-style: dashed;
+  border-top-color: transparent;
+  border-bottom-color: transparent;
+}
+@media (max-width: 767px) {
+  .navbar-nav .dropdown-submenu > a:before {
+    margin-top: 8px;
+    border-color: inherit;
+    border-style: solid;
+    border-width: 4px 4px 0;
+    border-left-color: transparent;
+    border-right-color: transparent;
+  }
+  .navbar-nav .dropdown-submenu > a {
+    padding-left: 40px;
+  }
+  .navbar-nav > .open > .dropdown-menu > .dropdown-submenu > .dropdown-menu > li > a,
+  .navbar-nav > .open > .dropdown-menu > .dropdown-submenu > .dropdown-menu > li > label {
+    padding-left: 35px;
+  }
+  .navbar-nav > .open > .dropdown-menu > .dropdown-submenu > .dropdown-menu > li > .dropdown-menu > li > a,
+  .navbar-nav > .open > .dropdown-menu > .dropdown-submenu > .dropdown-menu > li > .dropdown-menu > li > label {
+    padding-left: 45px;
+  }
+  .navbar-nav > .open > .dropdown-menu > .dropdown-submenu > .dropdown-menu > li > .dropdown-menu > li > .dropdown-menu > li > a,
+  .navbar-nav > .open > .dropdown-menu > .dropdown-submenu > .dropdown-menu > li > .dropdown-menu > li > .dropdown-menu > li > label {
+    padding-left: 55px;
+  }
+  .navbar-nav > .open > .dropdown-menu > .dropdown-submenu > .dropdown-menu > li > .dropdown-menu > li > .dropdown-menu > li > .dropdown-menu > li > a,
+  .navbar-nav > .open > .dropdown-menu > .dropdown-submenu > .dropdown-menu > li > .dropdown-menu > li > .dropdown-menu > li > .dropdown-menu > li > label {
+    padding-left: 65px;
+  }
+  .navbar-nav > .open > .dropdown-menu > .dropdown-submenu > .dropdown-menu > li > .dropdown-menu > li > .dropdown-menu > li > .dropdown-menu > li > .dropdown-menu > li > a,
+  .navbar-nav > .open > .dropdown-menu > .dropdown-submenu > .dropdown-menu > li > .dropdown-menu > li > .dropdown-menu > li > .dropdown-menu > li > .dropdown-menu > li > label {
+    padding-left: 75px;
+  }
+}
+.navbar-default .navbar-nav .open > .dropdown-menu > .dropdown-submenu.open > a,
+.navbar-default .navbar-nav .open > .dropdown-menu > .dropdown-submenu.open > a:hover,
+.navbar-default .navbar-nav .open > .dropdown-menu > .dropdown-submenu.open > a:focus {
+  background-color: #e7e7e7;
+  color: #555555;
+}
+@media (max-width: 767px) {
+  .navbar-default .navbar-nav .open > .dropdown-menu > .dropdown-submenu.open > a:before {
+    border-top-color: #555555;
+  }
+}
+.navbar-inverse .navbar-nav .open > .dropdown-menu > .dropdown-submenu.open > a,
+.navbar-inverse .navbar-nav .open > .dropdown-menu > .dropdown-submenu.open > a:hover,
+.navbar-inverse .navbar-nav .open > .dropdown-menu > .dropdown-submenu.open > a:focus {
+  background-color: #080808;
+  color: #ffffff;
+}
+@media (max-width: 767px) {
+  .navbar-inverse .navbar-nav .open > .dropdown-menu > .dropdown-submenu.open > a:before {
+    border-top-color: #ffffff;
+  }
+}