What is the best way to ensure that images appear in a square format?

Lately, I've been experimenting with the alpha version of bootstrap 4 for a project. No matter how hard I try, I can't seem to get uploaded images of different sizes to display as squares when displayed.

Do you remember how Instagram used to only display square thumbnails? That's what I'm trying to achieve. I've done some research and tried various methods suggested by others, but nothing has quite hit the mark like this one did:

However, the result is not exactly what I desire: https://i.sstatic.net/ZTfYx.jpg

As you can see, the images are not square, and there is a gap under the first one in order to align it with the other two columns (I want all columns to be the same width and height).

I generate image URLs using Django.

Here is the HTML I am using:

<div class="row">
    {% if competition_list %}
    {% for competition in competition_list %}

        <div class="col-md-4">
          <div class="card">
            <div class="image">
            <img class="card-image-top img-fluid" src="/{{competition.image.url}}" >
            </div>
            <div class="card-block">
              <h4 class="card-title">{{competition.name}}</h4>
              <p class="card-text">This is a wider card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.</p>
              <p><a class="btn btn-secondary" href="https://v4-alpha.getbootstrap.com/examples/jumbotron/#" role="button">View details »</a></p>
            </div>
            </div>
        </div>

    {% endfor %}
    {% else %}
    <p>No competitions in this category, please try another category</p>
    {% endif %}
    </div>

Below is my CSS code:

.card {
    margin-bottom: 10px;
}

.image{
    position:relative;
    overflow:hidden;
    padding-bottom:100%;
}
.image img{
    position:absolute;
}

The desired outcome would somewhat resemble this:

https://i.sstatic.net/VMsom.png Let me know if you require any further information.

Thank you in advance!

Answer №1

If you want to enhance your images, try using a wrapper and experimenting with width, max-width, and min-height:

<div class="img-wrapper">
  <img src="http://placehold.it/350x300">
</div>

<div class="img-wrapper">
  <img src="http://placehold.it/500x350">
</div>

<div class="img-wrapper">
  <img src="http://placehold.it/300x500">
</div>

By setting the width to 100%, the height will scale accordingly.

.img-wrapper {
  width: 300px;
  height: 300px;
  overflow: hidden;
  position: relative;
  background: rgba(0, 0, 0, 0.5);
  margin: 10px 0;
}
.img-wrapper img {
  width: 100%;
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
}

I've also added some properties like top, left, and transform to center the image vertically.

Another option is to use background-size: cover and modify the background-position as needed.

<div class="use-cover-background square" style="background-image: url(http://placehold.it/350x300)"></div>

<div class="use-cover-background square" style="background-image: url(http://placehold.it/500x300)"></div>

<div class="use-cover-background square" style="background-image: url(http://placehold.it/300x500)"></div>

// CSS

.use-cover-background {
  background-size: cover;
  background-position: center;
}
.square {
  margin: 10px 0;
  width: 300px;
  height: 300px;
}

For a demonstration, check out this link: https://jsfiddle.net/mcgnyfw9/

Best regards,

Answer №2

It's important to note that this solution is not specific to Django or Bootstrap. To achieve a square crop for your images, set them as backgrounds on the .image class.

<div class="image" style="background-image: url(/{{competition.image.url}});" ></div>

Ensure that CSS rules are in place to fill the element with the background image:

.card .image {
    background-size: cover;
}

If desired, you can also stretch the image to 100% of the height of .image and hide overflow horizontally, but using a background is the simpler approach.

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