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HTML

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About the <head>

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Insecure Resource

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CSS

About CSS Preprocessors

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

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

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About Vendor Prefixing

To get the best cross-browser support, it is a common practice to apply vendor prefixes to CSS properties and values that require them to work. For instance -webkit- or -moz-.

We offer two popular choices: Autoprefixer (which processes your CSS server-side) and -prefix-free (which applies prefixes via a script, client-side).

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JavaScript

About JavaScript Preprocessors

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

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Babel includes JSX processing.

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Packages

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Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.

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Using packages here is powered by esm.sh, which makes packages from npm not only available on a CDN, but prepares them for native JavaScript ESM usage.

All packages are different, so refer to their docs for how they work.

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HTML 

              
                <html>
  <body>
    <!-- Codepen example, by Michael Fosgerau -->
    <!-- Based on effect on http://blender.org (2018-03) -->
    <!-- Free image used in this example is from https://pixabay.com/da/baggrund-terninger-valg-en-bl%C3%A5-2492010/ -->
    <div class="container">
      <div class="topdiv">
        <h1>Slanted &lt;div&gt; layout</h1>
        <b>This is the top div.</b>
        Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. 
      </div>
    </div>
    <div class="container">
      <div class="imagebg"></div>
      <div class="middleoverlay"></div>
      <div class="topoverlay"></div>
      <div class="middlediv">
        <div class="rightbox">
          <b>This is the middle div.</b>
          Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
        </div>
      </div>
      <div class="topoverlay type2"></div>
    </div>
    <div class="bottomdiv">
      <b>This is the bottom div.</b>
      Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
    </div>
  </body>
</html>
!

CSS 

              
                html, body {
  font-family: segoe ui;
  font-size: 7pt;
  padding: 0;
  margin: 0;
  width: 100%;
  height: 100%;
  background: #aaa;
}
.topdiv {
  height: 240px;
  display: block;
  background-color: #000;
  color: #ddd;
  padding-top: 25px; 
  text-align: center;
      box-sizing: border-box;
  padding-left: 10%;
  padding-right: 10%;
}
.topoverlay {
  
  background-image: linear-gradient(2deg, transparent 49%, #000 50%);
  height: 50px;
  left: 0;
  position: relative;
  right: 0;
  top: 0;
  z-index: 0;
      box-sizing: border-box;
}
.middlediv {
  height: 200px;
  color: #000;
  padding-top: 65px; 
  text-align: center;
  z-index: 2;
}
.middleoverlay {
  background-color: #ddd;
  bottom: -100%;
  left: 50%;
  position: absolute;
  right: 0%;
  top: -50%;
  transform: rotate(15deg);
  border:5px solid #red;
}
.container {
  overflow: hidden;
      background-color: #fff;
    display: -ms-flexbox;
    display: flex;
    -ms-flex-direction: column;
    flex-direction: column;
    -ms-flex-pack: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
      box-sizing: border-box;
}
.type2 {
  background-image: linear-gradient(-2deg, #aaa 49%, transparent 50%);
  top: initial;
  bottom: 0;
}
.bottomdiv {
  background-color: #aaa;
  height: 200px;
  display: block;
  color: #333;
  padding-top: 65px; 
  text-align: left;
  box-sizing: border-box;
  padding-left: 10%;
  padding-right: 10%;
}
.rightbox {
  margin-left: 50%;
  padding-left: 10%;
  padding-right: 10%;
  text-align: left;
}
.imagebg {
  background-image:url('https://i.imgur.com/9JeuAuJ.jpg');
  background-color: #fff;
  background-position: center center;
  background-size: 60%;
  bottom: 0;
  left: -280px;
  position: absolute;
  right: 0;
  top: 0;
  color: #fff;
}

@media (min-width: 768px)
{
  body {
    font-size: 9pt;
  }
}

@media (min-width: 992px)
{
  body {
    font-size: 12pt;
  }
}

@media (min-width: 1200px)
{
  body {
    font-size: 14pt;
  }
}
!

JS
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999px

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