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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

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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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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

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

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="header">
        <h1>Animated Scrolling Title</h1>
    </div>

    <div class="content">
        <p>scroll down to see the animation</p>
        <p>created by <a href="http://stevenfabre.com">steven fabre</a></p>
       

    </div>
!

CSS 

              
                @import url(https://fonts.googleapis.com/css?family=Lato:300,900);




$backgroundBody: #ecf0f1;
$backgroundHeader: #2c3e50;
$primaryFont: 'Lato';

$titleColor: #e67e22;
$titleColorShadow: #D35400;
$titleFontSize: 3.7em;
$titlePadding: ($titleFontSize / 1.4) 0;


$paragraphColor: #34495e;

* {
  box-sizing:border-box;
}

html, body, div, object, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, ol, ul, li, form, fieldset, legend, label, table, header, footer, nav, section, figure {
  margin: 0;
  padding: 0;
}

body {
  background: $backgroundBody;
  min-height:100%;
  margin:0;
  position:relative;
  font-family:$primaryFont;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.header {
  background: $backgroundHeader;
  position:relative;
  padding:0 10%;
  overflow:hidden;

  h1 {
    text-transform: uppercase;
    font-size:$titleFontSize;
    padding: $titlePadding;
    color:$titleColor;
    text-align: center;
    text-shadow: 0px 2px 1px $titleColorShadow;

    span {
      display:inline-block;
    }
  }
}

.content {
  padding:2em 10% 80em 10%;
  p {
    color:$paragraphColor;
    font-size:2em;
    font-weight:300;
    text-align: center;
    margin:2em 0 0 0;
  }
  a {
    color:$titleColor;
    border-bottom:1px solid $titleColor;
    text-decoration: none;
    display:inline-block;
    position:relative;
    transition: all 0.2s;
    -webkit-transition: all 0.2s;
    -moz-transition: all 0.2s;
    -ms-transition: all 0.2s;
    -o-transition: all 0.2s;

    &:hover, &:focus {
      color:$titleColorShadow;
      border-bottom:1px solid $titleColorShadow;
    }
  }
}






ul.social {
  list-style-type: none;
  margin:0;
  padding:0;
  text-align:center;
  li {

    font-family: "fontello";
    font-style: normal;
    font-weight: normal;
    speak: none;
    font-size:1.5em;
    margin: 1em 0.5em;
    display:inline-block;
    position:relative;

    a {
      text-decoration:none;
      border:0;
      text-indent:9999px;
      overflow:hidden;
      position:relative;
      width:2em;
      height:2em;
      border-radius:50%;
      background:$titleColor;
      color:$backgroundBody;
      &:hover, &:focus {
        border:0;
        color:$backgroundBody;
        background:$titleColorShadow;
        top:2px;
      }
    }
  }
}


/* General Responsive */
@media all and (max-width: 40em) {
  body {
    font-size: 0.5em;
  }
}
@media all and (min-width: 40em) and (max-width: 60em) {
  body {
    font-size: 0.75em;
  }
}
@media all and (min-width: 60em) and (max-width: 80em) {
  body {
    font-size: 1em;
  }
}
@media all and (min-width: 80em) {
  body {
    font-size: 1.25em;
  }
}
!

JS 

              
                
$(document).ready(function() {
    var elementToAnimate = $('.header h1');
    animateScrollingLetters(elementToAnimate);
});


/* Animate Letters of an element e when the user scrolls down */
function animateScrollingLetters(element) {
    wrapCharacters(element);
    animateSpanScrolling(element);
}


/* Wrap each character of an element with spans */
function wrapCharacters(element) {
    $(element).contents().each(function() {
        if(this.nodeType === 1) {
            wrapCharacters(this);
        }
        else if(this.nodeType === 3) {
            $(this).replaceWith($.map(this.nodeValue.split(''), function(c) {
                if (c != ' ') {
                    return '<span>' + c + '</span>';
                }
                else {
                    return ' ';
                }
            }).join(''));
        }
    });
}


function animateSpanScrolling(element) {

    var currentDistance = 0;
    var distanceToEndAnimation = element.parent().height();

    /* *****************     */
    /* Default variables     */
    /* Arrays = orgin to end */
    /* *****************     */

    /* Variable: Rotate [Default: 0] */
    var rotate = [0,0];

    /* Variable: Scale [Default: 1] */
    var scale = [1,1];

    /* Variable: Opacity [Default: 1] */
    var opacity = [1,1];

    /* Variable: Translate Array X,Y,Z axes [Default: 0,0,0] */
    var translate = [[0,0,0],[0,0,0]];


    /* ************************** */
    /* Random Target Variables    */
    /* End                        */
    /* ************************** */
    var minRotate = -90;
    var maxRotate = 90;
    var ratioRotate = (maxRotate - minRotate) / distanceToEndAnimation;

    var minScale = 0;
    var maxScale = 1;
    var ratioScale = (maxScale - minScale) / distanceToEndAnimation;

    var minOpacity = 0;
    var maxOpacity = 1;
    var ratioOpacity = (maxOpacity - minOpacity) / distanceToEndAnimation;


    var minTranslateX = -300;
    var maxTranslateX = 300;
    var ratioTranslateX = (maxTranslateX - minTranslateX) / distanceToEndAnimation;

    var minTranslateY = -200;
    var maxTranslateY =  0;
    var ratioTranslateY = (maxTranslateY - minTranslateY) / distanceToEndAnimation;


    // Generate a random end target value for each letter and save it in letter array
    var letter = new Array();
    element.children('span').each(function(i) {
        letter[i] = new Array();

        letter[i][0] = new Array();

        letter[i][0][0] = generateRandomNumber(minRotate,maxRotate,0);
        ratioRotate = (rotate[0] - letter[i][0][0]) / distanceToEndAnimation;

        letter[i][0][1] = generateRandomNumber(minScale,maxScale,2);
        ratioScale = (scale[0] - letter[i][0][1]) / distanceToEndAnimation;

        letter[i][0][2] = generateRandomNumber(minOpacity,maxOpacity,2);
        ratioOpacity = (opacity[0] - letter[i][0][2]) / distanceToEndAnimation;

        letter[i][0][3] = generateRandomNumber(minTranslateX,maxTranslateX,0);
        ratioTranslateX = (translate[0][0] - letter[i][0][3]) / distanceToEndAnimation;

        letter[i][0][4] = generateRandomNumber(minTranslateY,maxTranslateY,0);
        ratioTranslateY = (translate[0][1] - letter[i][0][4]) / distanceToEndAnimation;

        // If end value is negative, ratio in inverted, so it decreases instead of increases
        var ratioLetterRotate = ratioRotate;
        if (letter[i][0][0] < rotate[0]) {
            ratioLetterRotate = ratioRotate * -1;
        }
        var ratioLetterScale = ratioScale;
        if (letter[i][0][1] > scale[0]) {
            ratioLetterScale = ratioScale * -1;
        }
        var ratioLetterOpacity = ratioOpacity;
        if (letter[i][0][2] > opacity[0]) {
            ratioLetterOpacity = ratioOpacity * -1;
        }
        var ratioLetterTranslateX = ratioTranslateX;
        var ratioLetterTranslateY = ratioTranslateY;



        letter[i][1] = new Array();
        letter[i][1][0] = ratioLetterRotate;
        letter[i][1][1] = ratioLetterScale;
        letter[i][1][2] = ratioLetterOpacity;
        letter[i][1][3] = ratioLetterTranslateX;
        letter[i][1][4] = ratioLetterTranslateY;
    });



    $(document).on('scroll', function() {
        currentDistance = $(document).scrollTop();
        if (currentDistance < distanceToEndAnimation) {

            element.find('span').each(function(i) {

                var cssRotate = currentDistance * letter[i][1][0];
                var cssOpacity = opacity[0] * (opacity[0] - currentDistance * letter[i][1][2]);
                var cssTranslate = 'translate3d('+ currentDistance * letter[i][1][3] +'px,'+ currentDistance * letter[i][1][4] +'px, 0)';
                var cssRotate = 'rotate(' + cssRotate + 'deg)';
                var cssScale = 'scale('+ scale[0] * (scale[0] - currentDistance * letter[i][1][1]) +','+ scale[0] * (scale[0] - currentDistance * letter[i][1][1]) +')';
                var cssTransform = cssTranslate + ' ' + cssRotate + ' ' + cssScale;
                $(this).css({
                    'transform':cssTransform,
                    '-webkit-transform':cssTransform,
                    '-moz-transform':cssTransform,
                    'opacity': cssOpacity
                });
            });
        }

    });
}


/* Generate a Random Number  from a range between min and max, dec defines how many decimals you want */
function generateRandomNumber(min, max, dec) {
    var difference = max-min;
    //this code generates a random number between max and min
    var randomNumber = (difference*Math.random()) + min;
    var result = Math.round(randomNumber*Math.pow(10,dec))/Math.pow(10,dec);
    return result;
}
!
999px

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