How to Maintain Original Image Width When Using CSS \'object-fit: contain\'?

CSS object-fit: contain; Maintaining Original Image Width in Layout

When using CSS's object-fit: contain property to resize images within flexbox containers, the images themselves may scale appropriately while the layout retains the original image width. This can result in the appearance of a horizontal scrollbar.

To understand why this occurs, it's important to grasp how object-fit operates. Let's examine a simpler example:

<code class="css">.box {
  width: 300px;
  height: 300px;
  border: 1px solid;
}
img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}</code>

<code class="html"><div class="box">
  <img src="https://picsum.photos/300/200?image=1069">
</div></code>

In this scenario, the img element is instructed to fit entirely within the .box container while preserving its aspect ratio. However, because the container has a fixed width, the image itself may not have enough space to expand.

This is where object-fit: contain comes into play. It scales the image down to fit within the width and height constraints of the container. However, the original width of the img element remains the same. This is because the width and height properties on the img element only affect the displayed size of the image, not the actual size of the underlying image.

To resolve the issue in your original code, you could consider:

• Using width: 100% and height: auto on the img element, allowing it to naturally scale according to its original aspect ratio.
• Adding overflow: hidden to the container element to prevent the horizontal scrollbar from appearing.

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