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HTML

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About the <head>

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Insecure Resource

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CSS

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CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

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JavaScript

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JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

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Babel includes JSX processing.

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HTML 

              
                <header role="banner">
  <h1>CSS Filter: Popup with Blurred Background</h1>
  <h2>Support: Webkit, Firefox, Android 4.4+, iOS 6.0+, No IE</h2>
  <p>(Experimenting with Sass &amp; Compass color functions to create page color scheme.)</p>
</header>

<nav>
  <ul>
    <li>Products</li>
    <li>About</li>
    <li>Contact</li>
    <li>Home</li>
  </ul>
</nav>

<main class="main-body">
  <p>Link to popup: <a href="popover.html">Open Popup</a></p>
  
  <p>
    <span class="circle saturated-beige "></span>
    <span class="circle saturated-complement"></span>
    <span class="circle saturated-invert"></span>
  </p>
  
  <p>Lorem ipsum dolor sit amet, vim denique neglegentur at, ex omnis forensibus nec, sit omnesque omittantur no. Vel error noster putant ea. Nam no audire epicuri, at congue consul est, adhuc scriptorem ne sea. Ei usu adhuc minimum tacimates. Usu ei viris decore persius, eos an placerat menandri tractatos, ne quando periculis usu. Soluta nusquam sit eu, fabellas nominati platonem duo ex.</p>

	<p>Suas semper liberavisse sed in. Duo error numquam cu, quo idque oblique debitis ne, meis electram dissentiet pro no. Vel an solum eligendi, ius te appetere legendos iudicabit. Ex eos veritus facilis persecuti, at eros illum dicunt mea. Ut ludus alienum est.
  </p>
</main>

<div class="greyscreen">
  <div class="popover">
    <h2>CSS filter: popup with  blurred background</h2>
    <p>Click anywhere inside the popup to close it. To re-open, click the "Open Popup" link.</p>
  </div>
</div>

<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<defs>
    <filter id="blur">
     	<feGaussianBlur stdDeviation="3"/>
    </filter>
  
    <filter id="drop-shadow">
	    <feGaussianBlur in="SourceAlpha" stdDeviation="2"/>
	    <feOffset dx="5" dy="5" result="offsetblur"/>
	    <feFlood flood-color="#000000"/>
	    <feComposite in2="offsetblur" operator="in"/>
	    <feMerge>
		    <feMergeNode/>
		    <feMergeNode in="SourceGraphic"/>
	    </feMerge>
	</filter>
</defs>
</svg>
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CSS 

              
                // New test code:
.greyscreen-open {
  > :not(.greyscreen) {
  	-webkit-filter: blur(3px);
    filter: url(#blur); // FF
	}
  
  .greyscreen {display: block;}
}

.greyscreen {
  display: none;
  background: rgba(0, 0, 0, .3);
  position: fixed;
  z-index: 500;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  padding: 0 1.5em;
  overflow: auto;
}

.popover {
  background: #fff;
  border-radius: 5px;
  border: 2px solid;
  box-shadow: 0 2px 4px rgba(0, 0, 0, .75);
  margin: 1.5em auto;
  padding: 1em;
  width: 32em;
  
  :first-child {margin-top: 0;}
  :last-child {margin-bottom: 0;}
}


// Color functions etc. layout:
* {box-sizing: border-box;}

// beige: #c4af89, #turquoise: #52a8ba
$base: #c4af89;
$saturated-base: saturate($base, 30%);
$light-base: lighten($base, 25%);
$base-black: darken($base, 50%);
$complement: complement($base);
$complement-black: darken($complement, 50%);
$saturated-complement: saturate($complement, 30%);
$invert: invert($base);
$saturated-invert: saturate($invert, 30%);

body {
  background: $light-base;
  color: $base-black;
}

[role="banner"] {
  background: $base;
  padding: 1em;
  
  h1 {margin: 0;}
}

nav {
  border-top: 10px solid $invert;
  background: $complement;
  color: $complement-black;
  
  ul {
    list-stye: none;
    margin: 0;
    padding: 0;
    display: table;
    width: 100%;
    table-layout: fixed;
    border-collapse: collapse;
    
    li {
      display: table-cell;
      text-align: center;
      padding: 0.5em 1em;
    }
  }
}

a {color: $saturated-complement;}

.circle {
  border-radius: 50%;
  display: inline-block;
  height: 4em;
  width: 4em;
  margin: .5em;
}

.saturated-beige {
  background: $saturated-base;
}

.saturated-complement {
  background: $saturated-complement;
}

.saturated-invert {background: $saturated-invert;}

.main-body {padding: 0 1em;}


// extra -----------------------
h1 {margin: 0;}
h1 + h2 {margin: .1em 0 0;}
header p {margin: .5em 0 0;}
body {margin: 0;}
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JS 

              
                $(document).ready(function() {
  // display popover on initial page load:
  $('body').addClass('greyscreen-open');
  
  $('a[href*="popover"]').click(function() {
    $('body').addClass('greyscreen-open');
    return false;
  });
  
  $('.popover').click(function() {
    $('body').removeClass('greyscreen-open');
  });
});
!
999px

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