Why an empty `content` property is necessary for ::after pseudo-element? [CSS]

The empty content property is necessary for the ::after pseudo-element in CSS because it is used to generate content that is inserted after the content of an element. Without the content property, the ::after pseudo-element will not be displayed on the page.

The content property can be used to insert text or other content into the ::after pseudo-element. It can also be used to insert images or other media into the element.

It is important to note that the content property must be set to an empty value, such as an empty string or none, if no content is to be inserted into the ::after pseudo-element. Failure to do so may result in unexpected behavior.

Here is an example of using the ::after pseudo-element with an empty content property:

<style>
    .example::after {
        content: "";
        display: block;
        height: 20px;
        width: 20px;
        background-color: blue;
    }
</style>

<div class="example"></div>

In this example, an empty ::after pseudo-element is added to a <div> element with the class "example". The content property is set to an empty string, and the ::after pseudo-element is styled to have a blue background color and a height and width of 20 pixels.

Overall, the empty content property is a crucial component in using the ::after pseudo-element in CSS, allowing for the insertion of content that is displayed after the content of an element.