Parallax & Zoom effect

Parallax & Zoom effect is one of the popular effect to add in the homepage or single blog page.

In this post, we will see how we can achieve a simple Parallax & Zoom effect.

For this, we need a wide image which can serve in the top of page. I’m using jQuery for custom scripts and bootstrap for simple layout view in html.

<pre class="wp-block-syntaxhighlighter-code"><head>
  <link href="<https://stackpath.bootstrapcdn.com/bootstrap/4.2.1/css/bootstrap.min.css>" rel="stylesheet" integrity="sha384-GJzZqFGwb1QTTN6wy59ffF1BuGJpLSa9DkKMp0DgiMDm4iYMj70gZWKYbI706tWS" crossorigin="anonymous">
  <a href="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.slim.min.js">https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.slim.min.js</a>
</head>
</pre>

The image used in the code snippet is grabbed from google image search. And we need tons of text or words to present in the page. So that it will looks like page full of content and also we will get vertical scroll bar.

<div class="header" id="parallex">
    <img class="header-image" src="<https://handluggageonly.co.uk/wp-content/uploads/2015/12/London-1.jpg>" alt="">
  </div>

<p class="container">
		Lorem ipsum dolor sit amet, consectetur adipisicing elit. Recusandae similique perferendis quaerat porro, facilis quidem itaque qui excepturi autem ab iure ea quae vero dolorum fugiat alias accusantium, unde laborum facere pariatur soluta quibusdam
</p>

I’m getting that bunch of text from Lorem Ipsum generator from internet. (there is plenty site to generate random text). If you are familiar with emmet, you can generate using that as well.

Next thing, we need to add some CSS magic to make our html looks decent. I’m adding width of image as 100% and if it leads or overflows the screen – we are hiding it.

body: {
  height: 100vh;
  width: 100vw;
  overflow: hidden;
}
img {
  width: 100%;
}
.header {
  height: 500px;
  overflow: hidden;
}
p {
  font-family: tahoma;
  font-size: 20px;
  padding: 50px;
}

Next big thing, lets capture the scrolling happening in website using jQuery and zoom the header image to apply Parallax effect.

$(window).scroll(function() {
  var scroll = $(window).scrollTop();
  $("#parallex img").css({
    width: 100 + scroll / 5 + "%"
  });
});

Here, we are adjusting the CSS width property of Parallax image based on scroll happens by 5%. So the image will start scaling or zooming whenever the scroll down or scroll up happens.

Here is the full demo with code.

Happy Coding!

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