Adding following HTML, CSS, Jquery on page to Create Animated Fixed Sticky Header On Scroll with CSS3 and Javascript

HTML CODE

<body>
<header>
    <h1>Sticky Header Title</h1>
    <nav>
      <a href="">Home</a>
      <a href="">About</a>
      <a href="">Service</a>
      <a href="">Contact</a>
    </nav>
  </header>
</body>

CSS CODE

<style>
@import "compass/css3";

@import "compass/css3";
@import "compass/reset";
*{
    @include box-sizing(border-box);
}

body{
    background-color: #ecf0f1;
    font-family: helvetica, arial, sans-serif;
    font-size: 16px;
    padding-top: 330px;
    @include transition(padding-top .5s ease);
        margin: 0;
        padding: 0;
}
header{
    width: 100%;
    height: 300px;
    background-color: #3498db;
    text-align: center;
    position: relative;
    position: fixed;
    top: 0;
    overflow: hidden;
    @include transition(all .5s ease);
    h1{
        font-size: 42px;
        color: #fff;
        line-height: 230px;
        text-transform: uppercase;
        font-weight: 100;
        @include transition(all .3s ease);
    }
    nav{
        position: absolute;
        bottom: 0;
        height: 60px;
        line-height: 60px;
        width: 100%;
        background-color: rgba(0,0,0,.1);
        a{
            color: #fff;
            display: inline-block;
            padding: 10px 15px;
            line-height: 1;
            text-decoration: none;
       @include border-radius(2px);
        &:hover{
          @include box-shadow(0 0 0 1px #fff);
        }
        }
    }
}
h2{
    font-size: 34px;
    text-transform: uppercase;
    font-weight: 100;
    line-height: 2;
    color: #2c3e50;
}
p{
    margin-bottom: 2rem;
    line-height: 2;
    color: #7f8c8d;
}
.wrapper{
    width: 800px;
    margin: 0 auto;
}
section{
    padding: 20px;
    margin-bottom: 40px;
    background-color: #fff;
    @include border-radius(4px);
    @include box-shadow(0 1px 0 rgba(0,0,0,.2));
}

/* Sticky Header Style */   
/* ---------------------------------------- */ 
body.sticky-header{
    padding-top: 100px;
    header{
        height: 60px;
        background-color: rgba(52,152,219,.9);
        h1{
            @include scale(0);
        }
    }
}

</style>

JS CODE

<script
  src="https://code.jquery.com/jquery-3.2.1.min.js"
  integrity="sha256-hwg4gsxgFZhOsEEamdOYGBf13FyQuiTwlAQgxVSNgt4="
  crossorigin="anonymous"></script>
<script>
$(function(){
  $(window).scroll(function(){
    var winTop = $(window).scrollTop();
    if(winTop >= 30){
      $("body").addClass("sticky-header");
    }else{
      $("body").removeClass("sticky-header");
    }
  });
});
</script>

Posted in tutorials on Sep 25, 2017