Create a sticky ad banner easily with CSS and Javascript

Create a sticky ad banner easily with CSS and Javascript, let do it by yourself follow by steps below:

1 - Make a sample HTML layout with header, left column and right column:

Main sidebar

Left column

What is Lorem Ipsum? 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.

Why do we use it? It is a long established fact that a reader will be distracted by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more-or-less normal distribution of letters, as opposed to using 'Content here, content here', making it look like readable English. Many desktop publishing packages and web page editors now use Lorem Ipsum as their default model text, and a search for 'lorem ipsum' will uncover many web sites still in their infancy. Various versions have evolved over the years, sometimes by accident, sometimes on purpose (injected humour and the like).

Where does it come from? Contrary to popular belief, Lorem Ipsum is not simply random text. It has roots in a piece of classical Latin literature from 45 BC, making it over 2000 years old. Richard McClintock, a Latin professor at Hampden-Sydney College in Virginia, looked up one of the more obscure Latin words, consectetur, from a Lorem Ipsum passage, and going through the cites of the word in classical literature, discovered the undoubtable source. Lorem Ipsum comes from sections 1.10.32 and 1.10.33 of "de Finibus Bonorum et Malorum" (The Extremes of Good and Evil) by Cicero, written in 45 BC. This book is a treatise on the theory of ethics, very popular during the Renaissance. The first line of Lorem Ipsum, "Lorem ipsum dolor sit amet..", comes from a line in section 1.10.32.

The standard chunk of Lorem Ipsum used since the 1500s is reproduced below for those interested. Sections 1.10.32 and 1.10.33 from "de Finibus Bonorum et Malorum" by Cicero are also reproduced in their exact original form, accompanied by English versions from the 1914 translation by H. Rackham.

right

banner


2 - Add CSS into your HTML file:

.header {
  padding: 5px 15px;
  background: #068bd8;
  color: #fff;
}

.left-col {
  padding: 15px;
  width: 70%;
  float: left;
  box-sizing: border-box;
}

.right-col {
   width: 30%;
   float: left;
}

.right-banner {
    background: #494;
    width: 100%;
    height: 400px;
    color: #fff;
    padding:20px;
    box-sizing: border-box;
}

.sticky {
  position: fixed;
  top: 20px;
  width: 100%;
} 


Add Javascript code:

const rightBanner = document.getElementById("right-banner");
const eOffset = rightBanner.offsetTop;

window.onscroll = () => onSticky(rightBanner, eOffset);

function onSticky(e, eOffset) {
  if (window.pageYOffset > eOffset) {
    e.classList.add("sticky");
  } else {
    e.classList.remove("sticky");
  }
}


Explanation:
We use onscroll method to check and use the offsetTop property of right banner to compare with the pageYOffset property of window, if pageYOffset > offsetTop we will add sticky class to right banner, otherwise we'll remove it.


Finaly, see your result on browser!



© 2019 4codev

Created with love by Sil.