CODEWITHSUNDEEP
jquery-animateonscroll
Johnny B Good
Johnny B Good

Reputation: 23

How to animate resize smaller logo image on scroll?

I was able to figure out how to animate header resize on scroll. However, I can't seem to figure out how to also animate a header logo image to make it smaller on scroll. Any help to modify the code below would be greatly appreciated.

$(document).on("scroll", function () {
    if
    ($(document).scrollTop() > 100) {
        $("header").addClass("shrink");
    } else {
        $("header").removeClass("shrink");
    }
});
#logo {
    width: 100%;
    margin: 0 auto;
    position: fixed;
}

#content {
    width: 100%;
    margin: 0 auto;
}

header {
    width: 100%;
    padding: 30px 0;
    background: #000;
    border-bottom: 1px solid #fff;
    /* animation magic */
    -webkit-transition: all 0.4s ease-in-out;
    -moz-transition: all 0.4s ease-in-out;
    z-index: 9999;
    top: 0;
    position: fixed;
}

.shrink {
    padding: 0;
}
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
    <head>
        <script src="http://code.jquery.com/jquery-2.1.4.min.js"></script>
    </head>
        <body>
        <div id="logo">
            <header><img src="https://www.computerhope.com/cdn/computer-hope.jpg"></header>
        </div>
        
        <div id="content">
            <p>Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum</p>
            <p>Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum</p>
            <p>Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum</p>
            <p>Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum</p>
            <p>Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum</p>
            <p>Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum</p>
        </div>
    </body>
</html>

Upvotes: 1

Views: 9581

Answers (1)

Marco
Marco

Reputation: 644

I would first of all change a bit your HTML like so:

 <header>
     <div id="logo">
         <img src="https://www.computerhope.com/cdn/computer-hope.jpg">
     </div>
 </header>

And change you css to this:

#logo 
{
   width:200px;/*give it a fixed size*/
   margin:0 auto;
   /* animation magic */
   -webkit-transition: all 1s ease-in-out;
   -moz-transition: all 1s ease-in-out ;
   -ms-transition: all 1s ease-in-out ;
   -o-transition: all 1s ease-in-out ;
   transition: all 1s ease-in-out ;
}

#logo img 
{
   width:100%;
   height:auto;
}

header 
{
   width: 100%;
   padding: 30px 0;
   background: #000;
   border-bottom: 1px solid #fff;
   z-index: 9999;
}

.shrink 
{
   width:100px;/*change the size here*/
}

Change your jQuery to this:

$(document).on("scroll", function(){
    if($(document).scrollTop() > 100)
    {
       $("#logo").addClass("shrink");
    }
    else
    {
        $("#logo").removeClass("shrink");
    }
});

Upvotes: 3

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