Simple Popup [HTML + CSS + JS]

index.html

<div class="Click-here">Click Here</div>        
<div class="custom-model-main">
    <div class="custom-model-inner">        
    <div class="close-btn">×</div>
        <div class="custom-model-wrap">
            <div class="pop-up-content-wrap">
               Content Here
            </div>
        </div>  
    </div>  
    <div class="bg-overlay"></div>
</div> 

script.js

$(".Click-here").on('click', function() {
  $(".custom-model-main").addClass('model-open');
}); 
$(".close-btn, .bg-overlay").click(function(){
  $(".custom-model-main").removeClass('model-open');
});














// TAB
// $(document).on('click', '.tab-wrap ul li a', function (e) {
//     var curTabContentId = $(this).attr('href');
//     $(this).parents('.tab-wrap').find('ul li').removeClass('active');
//     $(this).parents('li').addClass('active');
//     $(this).parents('.tab-wrap').find('.tab-content-id').removeClass('active');
//     $(curTabContentId).addClass("active");
//     e.preventDefault();
// });

scripts

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

simple-popup-html-css-js.markdown

Simple Popup [HTML + CSS + JS]

Simple Popup with optimized code

A Pen by Asadabbas on CodePen.

License.

style.css

body {
  font: normal 14px/100% "Andale Mono", AndaleMono, monospace;
  width: 300px;
  margin: 0 auto;
  display:flex;
  align-items:center;
  height:100vh;
}
.Click-here {
  cursor: pointer;
  background-image: linear-gradient(190deg, #f83600 0%, #fee140 100%);
  color: #fff;
  width: 180px;
  text-align: center;
  font-size:16px;
  padding: 18px 0;
  margin: 0 auto;
  transition:background-image 3s ease-in-out;
}
.Click-here:hover{
  transition:background-image 3s ease-in-out;
  background-image: linear-gradient(90deg, #fee140 0%, #f83600 100%);
}
.custom-model-main {
  text-align: center;
  overflow: hidden;
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0; /* z-index: 1050; */
  -webkit-overflow-scrolling: touch;
  outline: 0;
  opacity: 0;
  -webkit-transition: opacity 0.15s linear, z-index 0.15;
  -o-transition: opacity 0.15s linear, z-index 0.15;
  transition: opacity 0.15s linear, z-index 0.15;
  z-index: -1;
  overflow-x: hidden;
  overflow-y: auto;
}

.model-open {
  z-index: 99999;
  opacity: 1;
  overflow: hidden;
}
.custom-model-inner {
  -webkit-transform: translate(0, -25%);
  -ms-transform: translate(0, -25%);
  transform: translate(0, -25%);
  -webkit-transition: -webkit-transform 0.3s ease-out;
  -o-transition: -o-transform 0.3s ease-out;
  transition: -webkit-transform 0.3s ease-out;
  -o-transition: transform 0.3s ease-out;
  transition: transform 0.3s ease-out;
  transition: transform 0.3s ease-out, -webkit-transform 0.3s ease-out;
  display: inline-block;
  vertical-align: middle;
  width: 600px;
  margin: 30px auto;
  max-width: 97%;
}
.custom-model-wrap {
  display: block;
  width: 100%;
  position: relative;
  background-color: #fff;
  border: 1px solid #999;
  border: 1px solid rgba(0, 0, 0, 0.2);
  border-radius: 6px;
  -webkit-box-shadow: 0 3px 9px rgba(0, 0, 0, 0.5);
  box-shadow: 0 3px 9px rgba(0, 0, 0, 0.5);
  background-clip: padding-box;
  outline: 0;
  text-align: left;
  padding: 20px;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
  max-height: calc(100vh - 70px);
	overflow-y: auto;
}
.model-open .custom-model-inner {
  -webkit-transform: translate(0, 0);
  -ms-transform: translate(0, 0);
  transform: translate(0, 0);
  position: relative;
  z-index: 999;
}
.model-open .bg-overlay {
  background: rgba(0, 0, 0, 0.6);
  z-index: 99;
}
.bg-overlay {
  background: rgba(0, 0, 0, 0);
  height: 100vh;
  width: 100%;
  position: fixed;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  z-index: 0;
  -webkit-transition: background 0.15s linear;
  -o-transition: background 0.15s linear;
  transition: background 0.15s linear;
}
.close-btn {
  position: absolute;
  right: 0;
  top: -30px;
  cursor: pointer;
  z-index: 99;
  font-size: 30px;
  color: #fff;
}

@media screen and (min-width:800px){
	.custom-model-main:before {
	  content: "";
	  display: inline-block;
	  height: auto;
	  vertical-align: middle;
	  margin-right: -0px;
	  height: 100%;
	}
}
@media screen and (max-width:799px){
  .custom-model-inner{margin-top: 45px;}
}