How to Style a Div as a Responsive Square?

Styling a Div as a Responsive Square

Achieving a div element that automatically adjusts its height to match its width while maintaining aspect ratio can be a common styling challenge. Here's a detailed explanation and solution:

CSS Methodology

To create a responsive square div, we can utilize the CSS property "padding-bottom" and the unit "%". This method ensures that the height of the div remains proportional to its width. By setting the padding-bottom to the same percentage value as the width, we effectively create a square-shaped container.

HTML and CSS Code

Here's the HTML and CSS code that accomplishes this:

<div>

#square {
  height: 0;
  width: 20%;
  padding-bottom: 20%;
  background-color: red;
}

Explanation

• The "height" property is set to 0, allowing the padding-bottom to control the height.
• The "width" property is set to 20%, defining the percentage width of the div.
• The "padding-bottom" property is also set to 20%, creating a square-shaped div.

As the parent container's width changes, the div will maintain its aspect ratio, adjusting its height automatically to match its new width.

Compatibility

This solution works effectively on various browsers, including Firefox, Chrome, Edge, and Safari.

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