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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

            
              <div id="dd" class="wrapper-dropdown-4">To do
    <ul class="dropdown">
        <li><input type="checkbox" id="el-1" name="el-1" value="donut"><label for="el-1">Eat a donut</label></li>
        <li><input type="checkbox" id="el-2" name="el-2" value="neighbour"><label for="el-2">Spy on my neighbours</label></li>
        <li><input type="checkbox" id="el-3" name="el-3" value="T-rex"><label for="el-3">Feed my T-Rex</label></li>
    </ul>
</div>
            
          
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              @import "compass/css3";

*,*:after,*:before {
  box-sizing: border-box;
}

body {
font-family: 'Lato', 'Arial', sans-serif;
background: #DDD url(https://tympanus.net/Tutorials/CustomDropDownListStyling/images/bg.jpg);
font-weight: 300;
font-size: 15px;
color: #333;
-webkit-font-smoothing: antialiased;
overflow-y: scroll;
overflow-x: hidden;
}

.wrapper-dropdown-4 {
    /* Size and position */
    position: relative;
    width: 270px;
    margin: 40px auto;
    padding: 10px 10px 10px 30px;

    /* Styles */
    background: #fff;
    border: 1px solid silver;
    cursor: pointer;
    outline: none;
}

.wrapper-dropdown-4:after {
    content: "";
    width: 0;
    height: 0;
    position: absolute;
    right: 14px;
    top: 50%;
    margin-top: -3px;
    border-width: 6px 6px 0 6px;
    border-style: solid;
    border-color: #ffaa9f transparent;
}

.wrapper-dropdown-4 .dropdown {
    /* Size & position */
    position: absolute;
    top: 100%;
    margin-top: 1px;
    left: -1px;
    right: -1px;

    /* Styles */
    background: white;
    border: inherit;
    border-top: none;
    list-style: none;
    -webkit-transition: all 0.3s ease-out;
    -moz-transition: all 0.3s ease-out;
    -ms-transition: all 0.3s ease-out;
    -o-transition: all 0.3s ease-out;
    transition: all 0.3s ease-out;
  
    /* Hiding */
    opacity: 0;
    pointer-events: none;
}

/* Red lines: the pseudo-elements way */
.wrapper-dropdown-4 .dropdown:before,
.wrapper-dropdown-4:before {
    content: "";
    width: 4px;
    height: 100%;
    position: absolute;
    top: 0;
    left: 15px;
    border: 1px solid #ffaa9f;
    border-top: none;
    border-bottom: none;
    z-index: 2;
}

/* Red lines: the gradients way */

/*
.wrapper-dropdown-4 .dropdown,
.wrapper-dropdown-4 {
  background: linear-gradient(left, white 5%, #ffaa9f 5%, #ffaa9f 5.3%, white 5.3%, white 6.5%, #ffaa9f 6.5%, #ffaa9f 6.8%, white 6.8%);
}

.wrapper-dropdown-4 .dropdown li:hover label {
  background: linear-gradient(left, #f0F0F0 5%, #ffaa9f 5%, #ffaa9f 5.3%, #f0F0F0 5.3%, #f0F0F0 6.5%, #ffaa9f 6.5%, #ffaa9f 6.8%, #f0F0F0 6.8%);
}
*/

.wrapper-dropdown-4 .dropdown li {
    position: relative; /* Enable absolute positioning for checkboxes */
}

.wrapper-dropdown-4 .dropdown li label {
    display: block;
    padding: 10px 10px 10px 30px; /* Same padding as the button */
    border-bottom: 1px dotted #1ccfcf;
    -webkit-transition: all 0.3s ease-out;
    -moz-transition: all 0.3s ease-out;
    -ms-transition: all 0.3s ease-out;
    -o-transition: all 0.3s ease-out;
    transition: all 0.3s ease-out;
}

.wrapper-dropdown-4 .dropdown li:last-of-type label {
    border: none;
}

.wrapper-dropdown-4 .dropdown li input /* Checkboxes */ {
    position: absolute;
    display: block;
    right: 10px;
    top: 50%;
    margin-top: -8px;
}

/* Hover state */

.wrapper-dropdown-4 .dropdown li:hover label {
    background: #f0f0f0;
}

/* Checked state */

.wrapper-dropdown-4 .dropdown li input:checked ~ label {
    color: grey;
    text-decoration: line-through;
}

/* Active state */

.wrapper-dropdown-4.active:after {
    border-width: 0 6px 6px 6px;
}

.wrapper-dropdown-4.active .dropdown {
    opacity: 1;
    pointer-events: auto;
}
            
          
!
            
                		
			function DropDown(el) {
				this.dd = el;
				this.opts = this.dd.find('ul.dropdown > li');
				this.val = [];
				this.index = [];
				this.initEvents();
			}
			DropDown.prototype = {
				initEvents : function() {
					var obj = this;

					obj.dd.on('click', function(event){
						$(this).toggleClass('active');
						event.stopPropagation();
					});

					obj.opts.children('label').on('click',function(event){
						var opt = $(this).parent(),
							chbox = opt.children('input'),
							val = chbox.val(),
							idx = opt.index();

						($.inArray(val, obj.val) !== -1) ? obj.val.splice( $.inArray(val, obj.val), 1 ) : obj.val.push( val );
						($.inArray(idx, obj.index) !== -1) ? obj.index.splice( $.inArray(idx, obj.index), 1 ) : obj.index.push( idx );
					});
				},
				getValue : function() {
					return this.val;
				},
				getIndex : function() {
					return this.index;
				}
			}

			$(function() {

				var dd = new DropDown( $('#dd') );

				$(document).click(function() {
					// all dropdowns
					$('.wrapper-dropdown-4').removeClass('active');
				});

			});

		
            
          
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