Before After CSS Pseudo-elements

What is before after CSS Pseudo-elements?

before after CSS Pseudo-elements are a special type of CSS selector, but they’re not like any other kind. They can take an existing element and add new effects to it. In this article, we’ll explore the basics of pseudo-elements and how you can use them to make your website better.

Before-after pseudo-elements are a type of CSS selector that allows you to style content before and after the selected element. This is particularly useful for styling page headers, footers, or other areas at either end of a document.

How to use before after css?

The before after CSS selector creates an extra box before after the content of each selected element. Before-after CSS is also used for creating custom shapes.

we need the content property for the insert to specify the content

The content property is necessary before after CSS property. Without content property, we can not use the before after CSS property. In this tutorial, we describe what is the before-after CSS. And also describe how to use both pseudo-elements. Here we are posting a basic shape using before after CSS.

#callout {
      width: 130px;
      height: 90px;
      background: blue;
      position: relative;
      border-radius: 10px;
    #callout:before {
      content: "";
      position: absolute;
      right: 100%;
      top: 26px;
      border-top: 13px solid transparent;
      border-right: 26px solid blue;
      border-bottom: 13px solid transparent;
      width: 0;
      height: 0;
<div id="callout"></div>
before after CSS | custom CSS shape |  callout using CSS

In the above example, we used the before Pseudo-element to create the call-out shape.
There are only reasons to use them.

  • You can add the content before the element by using it.
  • You can add the content after the element.

What is the difference in between :: double colon or : single colon

Double colon has been introduced in CSS3. But Single Color Separator is supported by all the browsers. That is why we suggest that you also use a single colon. For better / cross browse compatibility use single colon: instead of:: double colon.

Are these two Pseudo-classes or Pseudo Element?

These are Pseudo Elements. The pseudo-elements are used to target a particular part of an element. And also it’s used for an absence part of an element. Like if we want to use the after or before the area of an element we used before after CSS pseudo-elements.

Is it necessary to use positions for using before after CSS?

The answer is a big NO, it all depends on us that we want to position with before after. If you want to create a custom shape you need positions. Like the above example. In the above example, we just set a position relative to our div and absolute to our pseudo-elements.

Because we need that triangle at the right side of our div. That is why we need positions only. If you want to add any text in our CSS pseudo-elements you don’t need to add position use we use content instead of position.

    #mydiv:before {
      content: "Good Morning";
      width: 0;
      height: 0;
<div id="callout">,Every one</div>

In the above example, we need to add Good Morning to our div. We simply add the content property of CSS. Here is the result of the above example.

Good Morning, Every one 

I hope this article finds you helpful. This article describes the pseudo-elements and also describes how to use them before after CSS. If you find this article helpful please let us know in the comment section. Please share this article with your friends too. Also, tell us what CSS property confused you we will create a tutorial on that property too.

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