How Do I Center an Image Both Horizontally and Vertically Within a Div?

Centering within a Div: Achieving Visual Alignment

In the realm of web development, aligning elements is crucial for creating visually appealing and functional designs. When dealing with images within a div, ensuring that they are centered both horizontally and vertically becomes essential.

Consider the following HTML snippet:

<div>
<p>By default, the image will be positioned at the top-left corner of the div. To achieve perfect centering, a combination of CSS properties is required:</p>
<p><strong>Horizontal Centering:</strong><br>To center the image horizontally, the following CSS rule is employed:</p>
<pre class="brush:php;toolbar:false">#over img {
  margin-left: auto;
  margin-right: auto;
}

This code instructs the browser to automatically adjust the left and right margins of the image so that it is equally spaced within its container.

Vertical Centering:
For vertical centering, the display property comes into play:

#over img {
  ...
  display: block;
}

Setting display: block ensures that the image behaves like a block-level element, taking up the full available width within the div.

These combined CSS rules effectively center the image both horizontally and vertically, resulting in a perfectly aligned image within the div.