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HTML

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HTML preprocessors can make writing HTML more powerful or convenient. For instance, Markdown is designed to be easier to write and read for text documents and you could write a loop in Pug.

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Adding Classes

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. So you don't have access to higher-up elements like the <html> tag. If you want to add classes there that can affect the whole document, this is the place to do it.

About the <head>

In CodePen, whatever you write in the HTML editor is what goes within the <body> tags in a basic HTML5 template. If you need things in the <head> of the document, put that code here.

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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.

Vendor Prefixing

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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HTML 

              
                <div class="tip">
   <svg height="40" viewBox="0 0 64 64" width="40" xmlns="http://www.w3.org/2000/svg"><path d="m61 11h-58a1 1 0 0 0 -1 1v9h60v-9a1 1 0 0 0 -1-1zm-54 7a2 2 0 1 1 2-2 2.006 2.006 0 0 1 -2 2zm7 0a2 2 0 1 1 2-2 2.006 2.006 0 0 1 -2 2zm7 0a2 2 0 1 1 2-2 2.006 2.006 0 0 1 -2 2z" fill="#57a4ff"/><g fill="#004fac"><path d="m61 10h-58a2.006 2.006 0 0 0 -2 2v40a2.006 2.006 0 0 0 2 2h58a2.006 2.006 0 0 0 2-2v-40a2.006 2.006 0 0 0 -2-2zm-58 2h58v8h-58zm58 40h-58v-30h58z"/><path d="m7 13a3 3 0 1 0 3 3 3.009 3.009 0 0 0 -3-3zm0 4a1 1 0 1 1 1-1 1 1 0 0 1 -1 1z"/><path d="m14 13a3 3 0 1 0 3 3 3.009 3.009 0 0 0 -3-3zm0 4a1 1 0 1 1 1-1 1 1 0 0 1 -1 1z"/><path d="m21 13a3 3 0 1 0 3 3 3.009 3.009 0 0 0 -3-3zm0 4a1 1 0 1 1 1-1 1 1 0 0 1 -1 1z"/><path d="m46 50h8a1 1 0 0 0 0-2h-8a1 1 0 0 0 0 2z"/><path d="m57 50h1a1 1 0 0 0 0-2h-1a1 1 0 0 0 0 2z"/><path d="m45 25v10a1 1 0 0 1 -2 0v-7.59l-20.59 20.59h7.59a1 1 0 0 1 0 2h-10a1 1 0 0 1 -.38-.08.956.956 0 0 1 -.54-.54 1 1 0 0 1 -.08-.38v-10a1 1 0 0 1 2 0v7.59l20.59-20.59h-7.59a1 1 0 0 1 0-2h10a1 1 0 0 1 .38.08.956.956 0 0 1 .54.54 1 1 0 0 1 .08.38z"/></g></svg>
  <p>- Resize browser to change video source</p>
</div>

<div class="video-container">
  <video autoplay muted playsinline loop class="responsive-video"
    data-video-src-sm="https://ak.picdn.net/shutterstock/videos/30708286/preview/stock-footage-t-l-ws-smooth-lake-and-alps-in-distance-kitzbueheler-austria.mp4"
    data-video-src-md="https://ak.picdn.net/shutterstock/videos/10851212/preview/stock-footage-mt-shasta-mountain-siskiyou-lake-bridge-california-recreation-landscape.mp4"
    data-video-src-lg="https://ak.picdn.net/shutterstock/videos/18667577/preview/stock-footage-aerial-footage-of-glenorchy-new-zealand-in-winter-lord-of-the-rings-film-location-middle-earth.mp4">
  </video>
</div>

<ul class="social">
  <li>
    <a href="https://codepen.io/rhyspacker/" class="icon codepen" title="CodePen" target="_blank">
      <svg viewBox="0 0 512 512">
        <path d="M427 201.9c-0.6-4.2-2.9-8-6.4-10.3L264.2 87.3c-4.9-3.3-11.4-3.3-16.3 
                 0L91.4 191.6c-4 2.7-6.5 7.4-6.5 12.2v104.3c0 4.8 2.5 9.6 6.5 12.2l156.4 104.3c4.9 
                 3.3 11.4 3.3 16.3 0L420.6 320.4c4-2.6 6.6-7.4 6.6-12.2V203.9C427.1 203.2 
                 427.1 202.6 427 201.9 427 201.7 427.1 202.6 427 201.9zM270.7 127.1l115.2 76.8 
                 -51.5 34.4 -63.8-42.7V127.1zM241.3 127.1v68.6l-63.8 42.7 -51.5-34.4L241.3 
                 127.1zM114.3 231.4l36.8 24.6 -36.8 24.6V231.4zM241.3 384.9L126.1 308.1l51.5-34.4 
                 63.8 42.6V384.9zM256 290.8l-52-34.8 52-34.8 52 34.8L256 290.8zM270.7 
                 384.9V316.3l63.8-42.6 51.5 34.4L270.7 384.9zM397.7 280.6l-36.8-24.6 
                 36.8-24.6V280.6z"/>
      </svg>
      <!--[if lt IE 9]><em>CodePen</em><![endif]-->
    </a>
  </li>
  <li>
    <a href="https://github.com/Rhyspacker" class="icon github" title="GitHub" target="_blank">
      <svg viewBox="0 0 512 512">
        <path d="M256 70.7c-102.6 0-185.9 83.2-185.9 185.9 0 82.1 53.3 151.8 127.1 176.4 
                 9.3 1.7 12.3-4 12.3-8.9V389.4c-51.7 11.3-62.5-21.9-62.5-21.9 -8.4-21.5-20.6-27.2-20.6-27.2 
                 -16.9-11.5 1.3-11.3 1.3-11.3 18.7 1.3 28.5 19.2 28.5 19.2 16.6 28.4 43.5 20.2 54.1 
                 15.4 1.7-12 6.5-20.2 11.8-24.9 -41.3-4.7-84.7-20.6-84.7-91.9 0-20.3 7.3-36.9 
                 19.2-49.9 -1.9-4.7-8.3-23.6 1.8-49.2 0 0 15.6-5 51.1 19.1 14.8-4.1 30.7-6.2 
                 46.5-6.3 15.8 0.1 31.7 2.1 46.6 6.3 35.5-24 51.1-19.1 51.1-19.1 10.1 25.6 3.8 44.5 
                 1.8 49.2 11.9 13 19.1 29.6 19.1 49.9 0 71.4-43.5 87.1-84.9 91.7 6.7 5.8 12.8 17.1 
                 12.8 34.4 0 24.9 0 44.9 0 51 0 4.9 3 10.7 12.4 8.9 73.8-24.6 127-94.3 
                 127-176.4C441.9 153.9 358.6 70.7 256 70.7z"/>
      </svg>
      <!--[if lt IE 9]><em>GitHub</em><![endif]-->
    </a>
  </li>
  <li>
    <a href="https://www.linkedin.com/in/rhyspacker/" class="icon linkedin" title="LinkedIn"  target="_blank">
      <svg viewBox="0 0 512 512">
        <path d="M186.4 142.4c0 19-15.3 34.5-34.2 34.5 -18.9 0-34.2-15.4-34.2-34.5 0-19 
                 15.3-34.5 34.2-34.5C171.1 107.9 186.4 123.4 186.4 142.4zM181.4 201.3h-57.8V388.1h57.8V201.3zM273.8 
                 201.3h-55.4V388.1h55.4c0 0 0-69.3 0-98 0-26.3 12.1-41.9 35.2-41.9 21.3 0 31.5 15 
                 31.5 41.9 0 26.9 0 98 0 98h57.5c0 0 0-68.2 0-118.3 0-50-28.3-74.2-68-74.2 -39.6 
                 0-56.3 30.9-56.3 30.9v-25.2H273.8z"/>
      </svg>
      <!--[if lt IE 9]><em>LinkedIn</em><![endif]-->
    </a>
  </li>
  
  <li>
    <a href="https://twitter.com/Rhyspacker" class="icon twitter" title="Twitter" target="_blank">
      <svg viewBox="0 0 512 512">
        <path d="M419.6 168.6c-11.7 5.2-24.2 8.7-37.4 10.2 13.4-8.1 23.8-20.8 28.6-36 
                 -12.6 7.5-26.5 12.9-41.3 15.8 -11.9-12.6-28.8-20.6-47.5-20.6 -42 0-72.9 39.2-63.4 
                 79.9 -54.1-2.7-102.1-28.6-134.2-68 -17 29.2-8.8 67.5 20.1 86.9 
                 -10.7-0.3-20.7-3.3-29.5-8.1 -0.7 30.2 20.9 58.4 52.2 64.6 -9.2 2.5-19.2 3.1-29.4 
                 1.1 8.3 25.9 32.3 44.7 60.8 45.2 -27.4 21.4-61.8 31-96.4 27 28.8 18.5 63 29.2 99.8 
                 29.2 120.8 0 189.1-102.1 185-193.6C399.9 193.1 410.9 181.7 419.6 168.6z"/>
      </svg>
      <!--[if lt IE 9]><em>Twitter</em><![endif]-->
    </a>
  </li>
</ul>
!

CSS 

              
                // ==============================
// Video 
// ========================================

.video-container {
  max-width: 1200px;
  margin: 0 auto 100px auto;
  padding: 0 20px;
  
  video {
    width: 100%;
  }
}

// ==============================
// Tip
// ========================================

.tip {
  max-width: 1200px;
  margin: 40px auto 40px auto;
  
  display: flex;
  justify-content: center;
  align-items: center;
  font-family: arial;
  font-weight: bold;
  
  svg {
    margin-right: 10px;
  }
}

// ==============================
// Social
// ========================================

.social {
  position: fixed;
  bottom: 20px;
  right: 0;
  font-size: 0;
  list-style: none; 
  margin: 0;
  padding: 0 26px;
  
  li {
    display: inline-block;
    margin: 12px;
  }
  
  a, svg {
    display: block;
  }
  
  a { 
    position: relative;
    height: 40px;
    width: 40px;
  }
  
  svg {
    height: 100%;
    width: 100%;
  }
  
  .icon {
    color: #444757;
    fill: #444757;
    &:hover {
      border-radius: 100%;
      
      color: #5f637a;
      fill: #5f637a;
      
      -webkit-transform: scale(1.25);

      transform: scale(1.25);

      -webkit-transition: background-color 0.5s, 
      -webkit-transform 0.5s ease-out;

      transition: background-color 0.5s, 
      -webkit-transform 0.5s ease-out;

      transition: background-color 0.5s, 
      transform 0.5s ease-out;

      transition: background-color 0.5s, 
      transform 0.5s ease-out, 
      -webkit-transform 0.5s ease-out;
    }
  }
}
!

JS 

              
                //##########################################################################
// Responsive video
//##########################################################################

var app = {
  debounce: function(func, wait = 100) {
    let timeout;
    return function(...args) {
      clearTimeout(timeout);
      timeout = setTimeout(() => {
        func.apply(this, args);
      }, wait);
    };
  }
};

app.responsiveVideo = {
  responsiveVideos: null,

  breakpoints: {
    tablet: 768,
    desktop: 1024
  },

  init: function() {
    var self = this;

    // Set local elements
    self.responsiveVideos = $('.responsive-video');

    if ( self.responsiveVideos.length ) {
      self.responsiveVideos.each(function(index, responsiveVideo) {
        self.handleVideoSource(responsiveVideo);
      })

      self.handleResize();
    }
  },

  handleVideoSource: function(responsiveVideo) {
    var self = this;

    var video = $(responsiveVideo);

    // Initialise the first load to set video.data('isMobile')/isTablet/isDesktop values
    //
    if ( !video.data('data-init') ) {

      // If tablet or less
      if ( $(window).width() <= self.breakpoints.tablet ) {
        if ( video.attr("data-video-src-sm") !== undefined ) {
          self.setSmallVideoSource(video);
        } else {
          self.setLargeVideoSource(video);
        }
      }
      // If above tablet and less than desktop
      else if ( $(window).width() > self.breakpoints.tablet && $(window).width() < self.breakpoints.desktop ) {
        if ( video.attr("data-video-src-md") !== undefined ) {
          self.setMediumVideoSource(video);
        } else {
          self.setLargeVideoSource(video);
        }
      }
      // If above desktop
      else if ( $(window).width() >= self.breakpoints.desktop ) {
        self.setLargeVideoSource(video);
      }

      video.data('data-init', true);
    } else {
      // This block is triggered on resize
      //
      // Use of video.data('isMobile')/isTablet/isDesktop prevents multiple <source> updates (when resizing)
      // Instead will only update at each breakpoint - not each resize event.
      //
      // Adds sources to video based on screen size,
      // from data-video-src-sm/data-video-src-md/data-video-src-lg
      // If sm/md sizes aren't defined it will default to lg
      //
      // If tablet or less
      if ( $(window).width() <= self.breakpoints.tablet && video.data('isMobile') === false ) {
        if ( video.attr("data-video-src-sm") !== undefined ) {
          self.setSmallVideoSource(video);
        } else {
          self.setLargeVideoSource(video);
        }
      }
      // If above tablet and less than desktop
      else if ( $(window).width() > self.breakpoints.tablet && $(window).width() < self.breakpoints.desktop && video.data('isTablet') === false ) {
        if ( video.attr("data-video-src-md") !== undefined ) {
          self.setMediumVideoSource(video);
        } else {
          self.setLargeVideoSource(video);
        }
      }
      // If above desktop
      else if ( $(window).width() >= self.breakpoints.desktop && video.data('isDesktop') === false  ) {
        self.setLargeVideoSource(video);
      }

    }

  },

  setLargeVideoSource: function(video) {
    var self = this;

    // Create source for .mp4
    //
    var source = `<source src='${video.data("video-src-lg")}' type='video/mp4'>`;

    // Reload the video with new source
    //
    video.html(source);
    video.get(0).load();
    video.get(0).play();

    // Set screen size state of this video
    //
    video.data('isMobile', false);
    video.data('isTablet', false);
    video.data('isDesktop', true);
  },

  setMediumVideoSource: function(video) {
    var self = this;

    // Create source for .mp4
    //
    var source = `<source src='${video.data("video-src-md")}' type='video/mp4'>`;

    // Reload the video with new source
    //
    video.html(source);
    video.get(0).load();
    video.get(0).play();

    // Set screen size state of this video
    //
    video.data('isMobile', false);
    video.data('isTablet', true);
    video.data('isDesktop', false);
  },

  setSmallVideoSource: function(video) {
    var self = this;

    // Create source for .mp4
    //
    var source = `<source src='${video.data("video-src-sm")}' type='video/mp4'>`;

    // Reload the video with new source
    //
    video.html(source);
    video.get(0).load();
    video.get(0).play();

    // Set screen size state of this video
    //
    video.data('isMobile', true);
    video.data('isTablet', false);
    video.data('isDesktop', false);
  },

  handleResize: function() {
    var self = this;

    self.responsiveVideos.each(function(index, responsiveVideo) {

      var width = $(window).width();

      window.addEventListener("resize", app.debounce(function() {
        if ( $(this).width() != width ) {
          width = $(this).width();

          self.handleVideoSource(responsiveVideo);
        }
      }, 500));

    });
  }
};

$(document).ready(function() {
  app.responsiveVideo.init();
})
!
999px

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