Maintaining Aspect Ratio in Auto-Resizing Div Elements
Problem Statement
Create a div element that:
- Automatically adjusts its size to fit available screen space
- Maintains its original aspect ratio when resized
- Fits within specified width and height dimensions
Solution
Utilizing the aspect-ratio property, you can achieve the desired behavior:
body {
height: 100vh;
margin: 0;
display: flex;
justify-content: center;
align-items: center;
background: gray;
}
.stage {
--r: 960 / 540;
aspect-ratio: var(--r);
width:min(90%, min(960px, 90vh*(var(--r))));
display: flex;
justify-content: center;
align-items: center;
background:
/* this gradient is a proof that the ratio is maintained since the angle is fixed */
linear-gradient(30deg,red 50%,transparent 50%),
chocolate;
}
Explanation
- aspect-ratio: var(--r): Defines the desired aspect ratio (960px : 540px)
-
width: Calculates the width based on the smaller of:
- 90% of the available window width
- 960px
- 90% of the window's height multiplied by the aspect ratio
- Linear Gradient Background: Demonstrates how the background pattern retains its aspect ratio while resizing.
This solution allows you to create a div that automatically resizes, maintaining its original aspect ratio, within the specified maximum dimensions.
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