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HTML

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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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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

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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JavaScript

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JavaScript preprocessors can help make authoring JavaScript easier and more convenient. For instance, CoffeeScript can help prevent easy-to-make mistakes and offer a cleaner syntax and Babel can bring ECMAScript 6 features to browsers that only support ECMAScript 5.

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Babel is required to process package imports. If you need a different preprocessor remove all packages first.

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About External Resources

You can apply a script from anywhere on the web to your Pen. Just put a URL to it here and we'll add it, in the order you have them, before the JavaScript in the Pen itself.

If the script you link to has the file extension of a preprocessor, we'll attempt to process it before applying.

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HTML Settings

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HTML 

            
              <!DOCTYPE html>
<html lang="ru">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Crowd at a concert Parallax</title>
    <link rel="stylesheet" href="style.css">
</head>
<body>
<div class="container">
        <div id="scene" class='parallax' data-speed="-4">
            <img src="https://ydmitry.ru/upload/blog/crowd/scene.png">
        </div>
        <div id="crowd-first" class='parallax'>
            <img src="https://ydmitry.ru/upload/blog/crowd/crowd-first.png">
        </div>
        <div id="crowd-second" class='parallax' data-speed="-2">
            <img src="https://ydmitry.ru/upload/blog/crowd/crowd-second.png">
        </div>
        <div id="crowd-third" class='parallax' data-speed="-3">
            <img src="https://ydmitry.ru/upload/blog/crowd/crowd-third.png">
        </div>
</div>
  <div class="container">
    <h1>lorem</h1>
    Lorem ipsum dolor sit amet consectetur adipisicing elit. Quidem deleniti et eum perferendis laboriosam odio, totam reiciendis non quasi repudiandae error ab aspernatur odit accusantium placeat laborum debitis nesciunt minima.
    Lorem ipsum dolor sit amet consectetur adipisicing elit. Dignissimos voluptatem modi necessitatibus culpa error molestiae magnam distinctio sed! Consequatur quam enim accusantium nam odio expedita facere debitis optio beatae doloremque.
    Placeat voluptatibus autem dolore numquam sapiente magnam. Doloremque, modi officia, repudiandae dolorem quis, eum illum quaerat distinctio sunt hic ratione mollitia veniam error! Pariatur tempore veritatis cupiditate tenetur, tempora consequuntur!
    Possimus quae omnis quasi tenetur ipsam itaque corrupti tempore ex quia eos ratione neque voluptatum eaque, ut dignissimos ullam aspernatur porro rerum, eligendi cupiditate facilis deleniti? Minima iusto nesciunt ea!
    Aliquam iure dolorem autem officia odit quis cumque nostrum corporis obcaecati, dignissimos provident commodi inventore placeat consectetur beatae quos, id vel at laborum debitis nesciunt. Eius expedita sunt tenetur sequi.
    Quas maxime, architecto enim quam commodi hic odit consectetur sed? Labore magni fuga, consequuntur minus obcaecati autem eaque quia? Suscipit iste harum minus maiores dolores laboriosam sed accusamus cupiditate veniam!
  </div>
</body>

</html>
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CSS 

            
              * {
    margin: 0;
    padding: 0;
}

body {
    background: #1f2c2c;
    color: #fff;
    font-family: Arial, serif;
}

.container {
    position: relative;
    background: #1f2c2c;
    height: 760px;
    width: 1200px;
    margin: 0 auto;
    overflow: hidden;
}

.parallax {
    position: absolute;
}

#scene {
    z-index: 100;
}

#crowd-third {
  z-index: 200;
}

#crowd-second {
  z-index: 300;
}

#crowd-first {
  z-index: 400;
}
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JS 

            
              $(document).ready(function(){

  var elem = $('.container'),
      pos = elem.offset(),
      elem_left = pos.left,
      elem_top = pos.top,
      elem_width = elem.width(),
      elem_height = elem.height(),
      x_center,
      y_center;


  $('.container').mousemove(function(e){

    x_center = ( elem_width / 2 ) - ( e.pageX - elem_left );
    y_center = ( elem_height / 2 ) - ( e.pageY - elem_top );

    $('.parallax').each(function(){

      var speed = $(this).attr('data-speed'),
          xPos = Math.round(-1*x_center/20*speed),
          yPos = Math.round(y_center/20*speed);

      if (yPos < 0)
        yPos = -2*speed;
     
      $(this).css('transform', 'translate3d('+xPos+'px, '+yPos+'px, 0px)');

        });

    });

});
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