Responsive jQuery / CSS3 Modal with Blurred Background

This is a jQuery & CSS3 based animated and responsive modal component that uses SVG filters to blur the background (main content) when the modal popup is triggered.

How to use it:

1. Build the markup structure for the modal popup.

<div class="modal is-active">
  <div class="modal__header">
    <div class="inner">
      <h2>Modal Title</h2>
    </div>
  </div>
  <div class="modal__content">
    <div class="inner">
      <p>Modal Content</p>
    </div>
  </div>
  <div class="modal__footer">
    <div class="inner">
      <button class="toggleModal">close</button>
    </div>
  </div>
</div>

2. Create a SVG filter for the blurred modal background.

<svg version="1.1" xmlns="http://www.w3.org/2000/svg">
  <filter id="blur">
    <feGaussianBlur stdDeviation="3"></feGaussianBlur>
  </filter>
</svg>

3. Style the modal popup in the CSS.

.modal {
  display: none;
  position: fixed;
  top: 50%;
  width: 100%;
  height: auto;
  margin-top: -150px;
  background-color: #fff;
  border-radius: 3px;
  z-index: 999;
  box-shadow: 0px 1px 3px 0px #d5d5d5;
}

@media only screen and (min-width: 650px) {

.modal {
  left: 50%;
  margin-left: -260px;
  max-width: 520px;
}
}

.modal.is-active {
  display: block;
  -webkit-animation: 1s linear slide;
  animation: 1s linear slide;
}

.modal .inner {
  position: relative;
  padding: 20px;
}

.modal__header { border-bottom: 1px solid #e1e1e1; }

.modal__footer { text-align: center; }

.modal__footer button { display: inline-block; }

4. The core CSS / CSS3 rules for the modal animation and blur effect.

@-webkit-keyframes 
slide {  from {
 top: 0;
}

to { top: 50%; }
}

@keyframes 
slide {  from {
 top: 0;
}

to { top: 50%; }
}

body.is-blurred .wrapper {
  -webkit-filter: url("#blur");
  filter: url("#blur");
  /* SVG filters for browser support. */
  -webkit-filter: blur(3px);
  filter: blur(3px);
  /* works in chrome */
  -webkit-transition: -webkit-filter 500ms linear;
  pointer-events: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

5. Include the necessary jQuery JavaScript library on the webpage.

<script src="//code.jquery.com/jquery-2.1.4.min.js"></script> 

6. The jQuery script to toggle CSS classes as the modal is toggled.

$('body').addClass('is-blurred');

$('.toggleModal').on('click', function (event) {
  event.preventDefault();
  
  $('.modal').toggleClass('is-active');
  $('body').toggleClass('is-blurred');
});

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This awesome jQuery plugin is developed by Elizabet Oliveira. For more Advanced Usages, please check the demo page or visit the official website.