material design checkbox

HTML

<link rel="stylesheet" href="https://bizamajig.com//content/18805/bizamajig-ia-marketplace-apps-18805-20150328-61.css">
<script src="https://bizamajig.com//include/bizamajig-ui-plugins-no-map.min.js"></script>
<div class="field">
<select class="form-control">
    <option>Add<option>
    <option>Option 1</option>
    <option>Option 2</option>
</select>
</div>

CSS

.dropdownjs {
  position: relative;
}
.dropdownjs  * {
  box-sizing: border-box;
}
.dropdownjs > input {
  width: 100%;
  padding-right: 30px;
  text-overflow: ellipsis;
}
.dropdownjs > input.focus ~ ul {
  transform: scale(1);
}
.dropdownjs > ul {
  position: absolute;
  padding: 0;
  margin: 0;
  min-width: 200px;
  transform: scale(0);
  z-index: 10000;
}
/*.dropdownjs > ul[placement=top-left] {*/
.dropdownjs > ul.placement-top-left {
  transform-origin: bottom left;
  bottom: 0;
  left: 0;
}
/*.dropdownjs > ul[placement=bottom-left] {*/
.dropdownjs > ul.placement-bottom-left {
  transform-origin: top left;
  top: 0;
  left: 0;
}
.dropdownjs > ul  > li {
  list-style: none;
  padding: 10px 20px;
}
.dropdownjs > ul  > li.dropdownjs-add {
  padding: 0;
}
.dropdownjs > ul  > li.dropdownjs-add > input {
  border: 0;
  padding: 10px 20px;
  width: 100%;
}

/* Theme */
.dropdownjs > input[readonly] {
  cursor: pointer;
}
select[data-dropdownjs][disabled] + .dropdownjs > input[readonly] {
  cursor: default;
}
.dropdownjs > ul {
  background: #FFF;
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.12), 0 1px 6px rgba(0, 0, 0, 0.12);
  transition: transform 0.2s ease-out;
  padding: 10px;
  overflow: auto;
  max-width: 500px;
}
.dropdownjs > ul > li {
  cursor: pointer;
  word-wrap: break-word;
}
.dropdownjs > ul > li.selected,
.dropdownjs > ul > li:active {
  background-color: #eaeaea;
}
.dropdownjs > ul > li:focus {
  outline: 0;
  outline: 1px solid #d4d4d4;
}
.dropdownjs > ul > li > .close:before {
  content: "\00d7";
  display: block;
  position: absolute;
  right: 15px;
  float: right;
  font-size: 21px;
  font-weight: 700;
  line-height: 1;
  color: #000;
  text-shadow: 0 1px 0 #fff;
  opacity: .6;
}
.dropdownjs > ul > li:h > .close:hover:before {
  opacity: .9;
}

JavaScript

//$.material.input("input.form-control, textarea.form-control"); // !IMPORTANT! We removed select.form-control, managed by dropdown.js

$( 'select' ).filter( ':visible' ).each( function( i ){
	var $target_select = $(this);
	var input__id = $target_select.prop( 'id' );
    $target_select.dropdown({
		optionClass: 					'withripple'
	});
});
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//
//	SEE: https://github.com/FezVrasta/dropdown.js
//
//	This plugin has been modified for single selects (multi can follow this pattern):
//
//	1 - Edited so that the underlying, native select input is updated with newly selected items.
//
//	2 - Added ability to .trigger( 'dropdownjs:updated' ) to refresh the dropdown from the native select input.
//		Replaced DOMNodeInserted with .on( 'dropdownjs:updated' ) for all browser compatibility.
//
//	3 - Changed attribute to class selectors:
//		- like placeholder/top-left to .placeholder-top-left and .placeholder-bottom-left
//		- like li[selected] to li.selected
//
//		And changed the related css, for example, .dropdownjs > ul[placement=top-left] to .dropdownjs > ul.placement-top-left{}
//
//	4 - Added data attribute, data-target-select, carrying ID of related select input, to the dropdown ul object.
//
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
(function (factory) {
    if (typeof define === 'function' && define.amd) {
        // AMD. Register as an anonymous module.
        define(['jquery'], factory);
    } else if (typeof exports === 'object') {
        // Node/CommonJS
        module.exports = factory(require('jquery'));
    } else {
        // Browser globals
        factory(jQuery);
    }
}(function($) {

  var methods = {
    options : {
      "optionClass": "",
      "dropdownClass": "",
      "autoinit": false,
     ...