Why Doesn't `object-fit` Work with Images in Flexbox Columns?

Understanding Why "object-fit" Doesn't Function in a Flexbox

In this inquiry, the goal is to utilize the "object-fit: cover" property to scale images within flexbox columns. However, it has been observed that the images remain unadjusted. This article clarifies the underlying mechanics and provides a solution.

The Principle Behind "object-fit"

As per the specification, "object-fit" directs how a replaced element's contents fit within the box defined by its height and width.

The Key Observation

Crucially, the "object-fit" property applies not to the parent container but to the replaced element itself (in this case, the image).

Solution: Nesting Within the Flex Item

To resolve the issue, the images should become the flex items instead of being nested within flex containers.

Revised Code

.container {
  display: flex;
  flex-direction: row;
  width: 100%;
}

img {
  object-fit: cover;
  flex: 1;
  margin-right: 1rem;
  overflow: hidden;
  height: 400px;
}

<div class="container">
  <img src="http://placehold.it/1920x1080">
  <img src="http://placehold.it/1920x1080">
  <img src="http://placehold.it/1920x1080">
  <img src="http://placehold.it/1920x1080">
</div>

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