How to Properly Resize Images Using object-fit: contain

Understanding object-fit: contain and Image Resizing

When using CSS object-fit: contain to make images responsive within flexbox containers, it's essential to understand how this property affects image width. Despite the resizing of images, the layout might retain the original image size, resulting in a scrollbar.

In object-fit: contain, the image is scaled proportionally so that the entire image remains within the specified container while preserving its aspect ratio. This ensures that the image is fully visible and avoids cropping. However, it doesn't necessarily resize the image to fit the width of its container.

To address this, you need to set the CSS width property of the container to a specific value or percentage that you want the image to be displayed at.

For example, if you have the following HTML:

<code class="html"><div class="container">
  <img  src="/static/imghwm/default1.png" data-src="image.jpg" class="lazy" alt="How to Properly Resize Images Using object-fit: contain" >
</div></code>

And the following CSS:

<code class="css">.container {
  width: 50%;
  height: 50%;
}

img {
  object-fit: contain;
}</code>

The image will be scaled proportionally to fit within the .container, but the width of the image will remain its original size. To fit the width of the container, you can specify the width of the .container as a percentage or absolute value:

<code class="css">.container {
  width: 100vw;  // 100% of the viewport width
}

// or

.container {
  width: 500px;  // 500 pixels
}</code>

Remember, object-fit: contain only ensures that the image is visible within the container without cropping. If you need to resize the image specifically to the width of the container, you need to set the width property of the container accordingly.

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