How Can I Preserve Image Aspect Ratio Using Flexbox?

Enforcing Image Aspect Ratio with Flexbox: Maintaining Proportions

In a flexbox layout, images often resize to fill the width of their container. While this behavior is desirable in many cases, it may not be suitable when you want to maintain the original aspect ratio of the images.

Consider the following HTML and CSS:

<div class="slider">
    <img src="image1.jpg">
    <img src="image2.jpg">
    <img src="image3.jpg">
</div>

.slider {
    display: flex;
}
.slider img {
    margin: 0 5px;
}

This code creates a slider with three images that stretch or shrink to fill the container horizontally.

Solution 1: Using object-fit

One way to maintain image aspect ratios is by using the CSS object-fit property. By setting object-fit: contain, you instruct the browser to resize the image while preserving its proportions.

.slider img {
    object-fit: contain;
}

This solution is simple and works well in most cases.

Solution 2: Flex-Specific Rules

Another approach is to use flex-specific rules. By setting align-self: center and flex: 0 0 auto, you force images to center themselves vertically and resize proportionally within their container.

.slider img {
    align-self: center;
    flex: 0 0 auto;
}

This method gives you more control over image positioning and is better suited for specific layout requirements.

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