Wordpress popup without any plugin - wordpress

Question

How can I make an easy popup on Wordpress without any plugins? This popup should be shown only for the first site visit. Any ideas, mates?

Answer 1

Maybe this:
codepen example
Html part in footer.php, css part in style.css and js part in main.js and that's it.

Answer 2

First download popup from here http://www.jqueryscript.net/lightbox/Super-Simple-Modal-Popups-with-jQuery-CSS3-Transitions.html
Now paste this code where you want to show popup into your template
<style>
html {
font-family: "roboto", helvetica;
position: relative;
height: 100%;
font-size: 100%;
line-height: 1.5;
color: #444;
}
h2 {
margin: 1.75em 0 0;
font-size: 5vw;
}
h3 { font-size: 1.3em; }
.v-center {
height: 100vh;
width: 100%;
display: table;
position: relative;
text-align: center;
}
.v-center > div {
display: table-cell;
vertical-align: middle;
position: relative;
top: -10%;
}
.btn {
font-size: 3vmin;
padding: 0.75em 1.5em;
background-color: #fff;
border: 1px solid #bbb;
color: #333;
text-decoration: none;
display: inline;
border-radius: 4px;
-webkit-transition: background-color 1s ease;
-moz-transition: background-color 1s ease;
transition: background-color 1s ease;
}
.btn:hover {
background-color: #ddd;
-webkit-transition: background-color 1s ease;
-moz-transition: background-color 1s ease;
transition: background-color 1s ease;
}
.btn-small {
padding: .75em 1em;
font-size: 0.8em;
}
.modal-box {
display: none;
position: absolute;
z-index: 1000;
width: 98%;
background: white;
border-bottom: 1px solid #aaa;
border-radius: 4px;
box-shadow: 0 3px 9px rgba(0, 0, 0, 0.5);
border: 1px solid rgba(0, 0, 0, 0.1);
background-clip: padding-box;
}
#media (min-width: 32em) {
.modal-box { width: 70%; }
}
.modal-box header,
.modal-box .modal-header {
padding: 1.25em 1.5em;
border-bottom: 1px solid #ddd;
}
.modal-box header h3,
.modal-box header h4,
.modal-box .modal-header h3,
.modal-box .modal-header h4 { margin: 0; }
.modal-box .modal-body { padding: 2em 1.5em; }
.modal-box footer,
.modal-box .modal-footer {
padding: 1em;
border-top: 1px solid #ddd;
background: rgba(0, 0, 0, 0.02);
text-align: right;
}
.modal-overlay {
opacity: 0;
filter: alpha(opacity=0);
position: absolute;
top: 0;
left: 0;
z-index: 900;
width: 100%;
height: 100%;
background: rgba(0, 0, 0, 0.3) !important;
}
a.close {
line-height: 1;
font-size: 1.5em;
position: absolute;
top: 5%;
right: 2%;
text-decoration: none;
color: #bbb;
}
a.close:hover {
color: #222;
-webkit-transition: color 1s ease;
-moz-transition: color 1s ease;
transition: color 1s ease;
}
</style>
<section class="v-center">
<div>
<a class="js-open-modal btn" href="#" data-modal-id="popup1"> Pop Up One</a> </div>
</section>
<div id="popup1" class="modal-box">
<header>
<h3>Pop Up One</h3>
</header>
<div class="modal-body">
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut commodo at felis vitae facilisis. Cras volutpat fringilla nunc vitae hendrerit. Donec porta id augue quis sodales. Sed sit amet metus ornare, mattis sem at, dignissim arcu. Cras rhoncus ornare mollis. Ut tempor augue mi, sed luctus neque luctus non. Vestibulum mollis tristique blandit. Aenean condimentum in leo ac feugiat. Sed posuere, est at eleifend suscipit, erat ante pretium turpis, eget semper ex risus nec dolor. Etiam pellentesque nulla neque, ut ullamcorper purus facilisis at. Nam imperdiet arcu felis, eu placerat risus dapibus sit amet. Praesent at justo at lectus scelerisque mollis. Mauris molestie mattis tellus ut facilisis. Sed vel ligula ornare, posuere velit ornare, consectetur erat.</p>
</div>
<footer> Close </footer>
</div>
<script src="http://code.jquery.com/jquery-1.11.1.min.js"></script>
<script>
$(function(){
var appendthis = ("<div class='modal-overlay js-modal-close'></div>");
$('a[data-modal-id]').click(function(e) {
e.preventDefault();
$("body").append(appendthis);
$(".modal-overlay").fadeTo(500, 0.7);
//$(".js-modalbox").fadeIn(500);
var modalBox = $(this).attr('data-modal-id');
$('#'+modalBox).fadeIn($(this).data());
});
$(".js-modal-close, .modal-overlay").click(function() {
$(".modal-box, .modal-overlay").fadeOut(500, function() {
$(".modal-overlay").remove();
});
});
$(window).resize(function() {
$(".modal-box").css({
top: ($(window).height() - $(".modal-box").outerHeight()) / 2,
left: ($(window).width() - $(".modal-box").outerWidth()) / 2
});
});
$(window).resize();
});
</script>