Simple Cookie Consent

CSS

.dp-cookie {
    display: none;
    position: fixed;
    z-index: 11;
    bottom: 18px;
    left: 50%;
    transform: translateX(-50%);
    background-color: #2e2e2b;
    width: calc(100% - 50px);
    max-width: 1500px;
    text-align: center;
    padding: 10px 20px;
    border-radius: 30px;
    -webkit-box-shadow: 1px 1px 5px 0px rgb(0 0 0);
    -moz-box-shadow: 1px 1px 5px 0px rgba(0, 0, 0, 0, 1);
    box-shadow: 1px 1px 5px 0px rgb(0 0 0);
}
.dp-cookie p,
.dp-cookie button {
    color: #ffffff;
    font-size: 14px;
    display: inline-block;
    vertical-align: middle;
}
.dp-cookie p {
    margin: 5px 0;
}
.dp-cookie button {
    font-size: 14px;
    background-color: #5e5e5e;
    margin-left: 10px;
    padding: 10px 20px;
    border-radius: 20px;
    cursor: pointer;
    -webkit-transition: all 0.3s;
    -moz-transition: all 0.3s;
    -o-transition: all 0.3s;
    -ms-transition: all 0.3s;
    transition: all 0.3s;
}
.dp-cookie button:hover {
    background-color: #1f1f1f;
}

HTML

<!-- before </footer> -->
<div class="dp-cookie">
    <p>We use cookies to ensure that we give you the best experience on our website. If you continue to use this site we will assume that you are happy with it.</p>
    <button>AGREE</button>
</div>

JS

jQuery( document ).ready( function( $ ) {
  if ( document.cookie.indexOf( 'accepted_cookies=' ) < 0 )
    $( '.dp-cookie' ).fadeIn();

  $( '.dp-cookie button' ).on( 'click', function() {
    document.cookie = 'accepted_cookies=yes;';
    $( '.dp-cookie' ).fadeOut();
  } );
} );